/* Consolidated CSS for Learnfrench App - All styles in one file */
/* This file contains all CSS from the modular architecture consolidated into main.css */

/* Modern CSS Architecture for Learnfrench App */

/* Local Resources */
/* Material Icons Local Implementation
 * Self-hosted replacement for Google Material Icons
 * Using CSS with JavaScript-initialized icon mappings
 */

.material-icons {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  width: 24px;
  height: 24px;
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

/* When Material Icons font isn't available, use emoji/symbol fallbacks */
.material-icons.fallback {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 1.2em;
}

/* Ensure icons work in high contrast mode */
@media (prefers-contrast: high) {
  .material-icons {
    filter: contrast(2);
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .material-icons {
    transition: none;
  }
}

/* Size variants */
.material-icons.small {
  font-size: 18px;
  width: 18px;
  height: 18px;
}

.material-icons.large {
  font-size: 36px;
  width: 36px;
  height: 36px;
}

/* Color variants for better theme integration */
.material-icons.primary {
  color: var(--color-primary, #60a5fa);
}

.material-icons.secondary {
  color: var(--color-text-secondary, #6b7280);
}

.material-icons.success {
  color: var(--color-success, #10b981);
}

.material-icons.warning {
  color: var(--color-warning, #fbbf24);
}

.material-icons.error {
  color: var(--color-error, #f87171);
}
/* Bootstrap Replacement - Local Utility Classes
 * Provides essential Bootstrap-like utility classes without CDN dependency
 */

/* Box model reset */
*, *::before, *::after {
  box-sizing: border-box;
}

html,
body {
  max-width: 100%;
  overflow-x: hidden;
}

body {
  margin: 0;
}

img,
video,
canvas,
svg {
  max-width: 100%;
  height: auto;
}

/* Container system */
.container-fluid {
  width: 100%;
  padding-right: var(--space-4, 15px);
  padding-left: var(--space-4, 15px);
  margin-right: auto;
  margin-left: auto;
}

.container {
  width: 100%;
  padding-right: var(--space-4, 15px);
  padding-left: var(--space-4, 15px);
  margin-right: auto;
  margin-left: auto;
}

@media (min-width: 576px) {
  .container {
    max-width: 540px;
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 720px;
  }
}

@media (min-width: 992px) {
  .container {
    max-width: 960px;
  }
}

@media (min-width: 1200px) {
  .container {
    max-width: 1140px;
  }
}

/* Grid system */
.row {
  display: flex;
  flex-wrap: wrap;
  margin-right: -15px;
  margin-left: -15px;
}

.col,
.col-1, .col-2, .col-3, .col-4, .col-5, .col-6,
.col-7, .col-8, .col-9, .col-10, .col-11, .col-12 {
  position: relative;
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
}

.col {
  flex-basis: 0;
  flex-grow: 1;
  max-width: 100%;
}

.col-12 { flex: 0 0 100%; max-width: 100%; }
.col-11 { flex: 0 0 91.666667%; max-width: 91.666667%; }
.col-10 { flex: 0 0 83.333333%; max-width: 83.333333%; }
.col-9 { flex: 0 0 75%; max-width: 75%; }
.col-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
.col-7 { flex: 0 0 58.333333%; max-width: 58.333333%; }
.col-6 { flex: 0 0 50%; max-width: 50%; }
.col-5 { flex: 0 0 41.666667%; max-width: 41.666667%; }
.col-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
.col-3 { flex: 0 0 25%; max-width: 25%; }
.col-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
.col-1 { flex: 0 0 8.333333%; max-width: 8.333333%; }

/* Responsive grid */
@media (min-width: 576px) {
  .col-sm { flex-basis: 0; flex-grow: 1; max-width: 100%; }
  .col-sm-12 { flex: 0 0 100%; max-width: 100%; }
  .col-sm-6 { flex: 0 0 50%; max-width: 50%; }
  .col-sm-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
  .col-sm-3 { flex: 0 0 25%; max-width: 25%; }
}

@media (min-width: 768px) {
  .col-md { flex-basis: 0; flex-grow: 1; max-width: 100%; }
  .col-md-12 { flex: 0 0 100%; max-width: 100%; }
  .col-md-6 { flex: 0 0 50%; max-width: 50%; }
  .col-md-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
  .col-md-3 { flex: 0 0 25%; max-width: 25%; }
}

/* Display utilities */
.d-none { display: none !important; }
.d-inline { display: inline !important; }
.d-inline-block { display: inline-block !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-inline-flex { display: inline-flex !important; }

@media (min-width: 576px) {
  .d-sm-none { display: none !important; }
  .d-sm-block { display: block !important; }
  .d-sm-flex { display: flex !important; }
}

@media (min-width: 768px) {
  .d-md-none { display: none !important; }
  .d-md-block { display: block !important; }
  .d-md-flex { display: flex !important; }
}

/* Flexbox utilities */
.flex-row { flex-direction: row !important; }
.flex-column { flex-direction: column !important; }
.flex-row-reverse { flex-direction: row-reverse !important; }
.flex-column-reverse { flex-direction: column-reverse !important; }

.justify-content-start { justify-content: flex-start !important; }
.justify-content-end { justify-content: flex-end !important; }
.justify-content-center { justify-content: center !important; }
.justify-content-between { justify-content: space-between !important; }
.justify-content-around { justify-content: space-around !important; }

.align-items-start { align-items: flex-start !important; }
.align-items-end { align-items: flex-end !important; }
.align-items-center { align-items: center !important; }
.align-items-baseline { align-items: baseline !important; }
.align-items-stretch { align-items: stretch !important; }

.align-content-start { align-content: flex-start !important; }
.align-content-end { align-content: flex-end !important; }
.align-content-center { align-content: center !important; }
.align-content-between { align-content: space-between !important; }
.align-content-around { align-content: space-around !important; }
.align-content-stretch { align-content: stretch !important; }

.align-self-auto { align-self: auto !important; }
.align-self-start { align-self: flex-start !important; }
.align-self-end { align-self: flex-end !important; }
.align-self-center { align-self: center !important; }
.align-self-baseline { align-self: baseline !important; }
.align-self-stretch { align-self: stretch !important; }

/* Gap utilities */
.gap-0 { gap: 0 !important; }
.gap-1 { gap: 0.25rem !important; }
.gap-2 { gap: 0.5rem !important; }
.gap-3 { gap: 1rem !important; }
.gap-4 { gap: 1.5rem !important; }
.gap-5 { gap: 3rem !important; }

/* Spacing utilities */
.m-0 { margin: 0 !important; }
.m-1 { margin: 0.25rem !important; }
.m-2 { margin: 0.5rem !important; }
.m-3 { margin: 1rem !important; }
.m-4 { margin: 1.5rem !important; }
.m-5 { margin: 3rem !important; }

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: 0.25rem !important; }
.mt-2 { margin-top: 0.5rem !important; }
.mt-3 { margin-top: 1rem !important; }
.mt-4 { margin-top: 1.5rem !important; }
.mt-5 { margin-top: 3rem !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: 0.25rem !important; }
.mb-2 { margin-bottom: 0.5rem !important; }
.mb-3 { margin-bottom: 1rem !important; }
.mb-4 { margin-bottom: 1.5rem !important; }
.mb-5 { margin-bottom: 3rem !important; }

.ms-0, .ml-0 { margin-left: 0 !important; }
.ms-1, .ml-1 { margin-left: 0.25rem !important; }
.ms-2, .ml-2 { margin-left: 0.5rem !important; }
.ms-3, .ml-3 { margin-left: 1rem !important; }
.ms-4, .ml-4 { margin-left: 1.5rem !important; }
.ms-5, .ml-5 { margin-left: 3rem !important; }

.me-0, .mr-0 { margin-right: 0 !important; }
.me-1, .mr-1 { margin-right: 0.25rem !important; }
.me-2, .mr-2 { margin-right: 0.5rem !important; }
.me-3, .mr-3 { margin-right: 1rem !important; }
.me-4, .mr-4 { margin-right: 1.5rem !important; }
.me-5, .mr-5 { margin-right: 3rem !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: 0.25rem !important; }
.p-2 { padding: 0.5rem !important; }
.p-3 { padding: 1rem !important; }
.p-4 { padding: 1.5rem !important; }
.p-5 { padding: 3rem !important; }

.pt-0 { padding-top: 0 !important; }
.pt-1 { padding-top: 0.25rem !important; }
.pt-2 { padding-top: 0.5rem !important; }
.pt-3 { padding-top: 1rem !important; }
.pt-4 { padding-top: 1.5rem !important; }
.pt-5 { padding-top: 3rem !important; }

.pb-0 { padding-bottom: 0 !important; }
.pb-1 { padding-bottom: 0.25rem !important; }
.pb-2 { padding-bottom: 0.5rem !important; }
.pb-3 { padding-bottom: 1rem !important; }
.pb-4 { padding-bottom: 1.5rem !important; }
.pb-5 { padding-bottom: 3rem !important; }

.ps-0, .pl-0 { padding-left: 0 !important; }
.ps-1, .pl-1 { padding-left: 0.25rem !important; }
.ps-2, .pl-2 { padding-left: 0.5rem !important; }
.ps-3, .pl-3 { padding-left: 1rem !important; }
.ps-4, .pl-4 { padding-left: 1.5rem !important; }
.ps-5, .pl-5 { padding-left: 3rem !important; }

.pe-0, .pr-0 { padding-right: 0 !important; }
.pe-1, .pr-1 { padding-right: 0.25rem !important; }
.pe-2, .pr-2 { padding-right: 0.5rem !important; }
.pe-3, .pr-3 { padding-right: 1rem !important; }
.pe-4, .pr-4 { padding-right: 1.5rem !important; }
.pe-5, .pr-5 { padding-right: 3rem !important; }

/* Sizing utilities */
.w-25 { width: 25% !important; }
.w-50 { width: 50% !important; }
.w-75 { width: 75% !important; }
.w-100 { width: 100% !important; }
.w-auto { width: auto !important; }

.h-25 { height: 25% !important; }
.h-50 { height: 50% !important; }
.h-75 { height: 75% !important; }
.h-100 { height: 100% !important; }
.h-auto { height: auto !important; }

/* Text alignment */
.text-left { text-align: left !important; }
.text-right { text-align: right !important; }
.text-center { text-align: center !important; }
.text-justify { text-align: justify !important; }

/* Button styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  margin-bottom: 0;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  vertical-align: middle;
  cursor: pointer;
  user-select: none;
  background-color: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius, 0.375rem);
  transition: all 0.15s ease-in-out;
}

.btn:hover {
  text-decoration: none;
}

.btn:focus {
  outline: 0;
  box-shadow: 0 0 0 0.2rem rgba(var(--color-primary-rgb, 0, 123, 255), 0.25);
}

.btn-primary {
  color: var(--color-text-inverse);
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

.btn-secondary {
  color: var(--color-text-inverse);
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
}

.btn-outline-primary {
  color: var(--color-primary);
  background-color: transparent;
  border-color: var(--color-primary);
}

.btn-outline-primary:hover {
  color: var(--color-text-inverse);
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-sm {
  padding: 0.25rem 0.5rem;
  font-size: 0.875rem;
  border-radius: calc(var(--radius, 0.375rem) * 0.8);
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1.125rem;
  border-radius: calc(var(--radius, 0.375rem) * 1.2);
}

/* Card component */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  word-wrap: break-word;
  background-color: var(--color-bg-card, #1f2937);
  background-clip: border-box;
  border: 1px solid var(--color-border-light, rgba(15, 23, 42, 0.3));
  border-radius: var(--radius, 0.375rem);
}

.card-body {
  flex: 1 1 auto;
  padding: 1rem;
}

.card-header {
  padding: 0.75rem 1rem;
  margin-bottom: 0;
  background-color: var(--color-bg-secondary, #1f2937);
  border-bottom: 1px solid var(--color-border-light, rgba(148, 163, 184, 0.35));
  border-top-left-radius: calc(var(--radius, 0.375rem) - 1px);
  border-top-right-radius: calc(var(--radius, 0.375rem) - 1px);
}

/* Base Styles */
/* CSS Custom Properties - Unified Dark Theme Design System */
:root {
  /* Enhanced Primary Colors - Unified Dark Theme */
  --color-primary: #60a5fa;
  --color-primary-light: #93c5fd;
  --color-primary-dark: #3b82f6;
  --color-secondary: #6b7280;
  --color-accent: #fbbf24;
  --color-french-blue: #0f172a;
  --color-french-red: #dc2626;
  --color-french-white: #ffffff;

  /* Enhanced Background Colors - Unified Dark Theme (Eye-Friendly Day/Night) */
  --color-bg-primary: #111827;
  --color-bg-secondary: #1f2937;
  --color-bg-tertiary: #273449;
  --color-bg-accent: #1e3a5f;
  --color-bg-canvas: #111827;
  --color-bg-overlay: #1f2937;
  --color-bg-subtle: #273449;
  --color-bg-card: #1f2937;
  --color-bg-interactive: #273449;
  --color-bg-success: #1a5646;
  --color-bg-warning: #5d4e2a;
  --color-bg-error: #5d2a2a;

  /* Enhanced Text Colors - Unified Dark Theme (Improved High Readability) */
  --color-text-primary: #f8fafc;
  --color-text-secondary: #e2e8f0;
  --color-text-tertiary: #cbd5e1;
  --color-text-inverse: #f8fafc;
  --color-text-link: #93c5fd;
  --color-text-muted: #94a3b8;
  --color-text-success: #34d399;
  --color-text-warning: #fbbf24;
  --color-text-error: #f87171;
  
  /* Enhanced Border Colors - Unified Dark Theme (Better Contrast) */
  --color-border-default: #374151;
  --color-border-muted: #27303f;
  --color-border-subtle: #1f2533;
  --color-border-light: #2f3a4e;
  --color-border-interactive: #60a5fa;
  --color-border-success: #34d399;
  --color-border-warning: #fbbf24;
  --color-border-error: #f87171;
  
  /* Header tokens */
  --header-surface: #1f2937;
  --header-on-surface: var(--color-text-primary);
  --header-divider: rgba(148, 163, 184, 0.25);
  --header-shadow: 0 2px 10px rgba(2, 6, 23, 0.45);
  --header-link: rgba(226, 232, 240, 0.82);
  --header-link-active: var(--color-text-inverse);
  --header-link-indicator: var(--color-primary);
  --header-button-bg: rgba(148, 163, 184, 0.12);
  --header-button-bg-hover: rgba(96, 165, 250, 0.2);
  --header-button-border: rgba(148, 163, 184, 0.25);
  --header-button-border-hover: rgba(96, 165, 250, 0.35);

  /* Enhanced Status Colors - Unified Dark Theme */
  --color-success: #10b981;
  --color-success-bg: #064e3b;
  --color-success-light: #34d399;
  --color-warning: #fbbf24;
  --color-warning-bg: #451a03;
  --color-warning-light: #fcd34d;
  --color-error: #f87171;
  --color-error-bg: #7f1d1d;
  --color-error-light: #fca5a5;
  --color-info: #60a5fa;
  --color-info-bg: #1e3a8a;
  --color-info-light: #93c5fd;
  
  /* Spacing Scale - GitHub Style */
  --space-xs: 0.25rem;   /* 4px */
  --space-sm: 0.5rem;    /* 8px */
  --space-md: 1rem;      /* 16px */
  --space-lg: 1.5rem;    /* 24px */
  --space-xl: 2rem;      /* 32px */
  --space-2xl: 2.5rem;   /* 40px */
  --space-3xl: 3rem;     /* 48px */
  --space-4xl: 4rem;     /* 64px */
  
  /* GitHub-specific spacing */
  --space-1: 0.25rem;    /* 4px */
  --space-2: 0.5rem;     /* 8px */
  --space-3: 0.75rem;    /* 12px */
  --space-4: 1rem;       /* 16px */
  --space-5: 1.25rem;    /* 20px */
  --space-6: 1.5rem;     /* 24px */
  --space-8: 2rem;       /* 32px */
  
  /* Typography Scale - GitHub Style */
  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 1.875rem;  /* 30px */
  --text-4xl: 2.25rem;   /* 36px */
  --text-5xl: 3rem;      /* 48px */
  
  /* Font Family - GitHub Style */
  --font-family-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-family-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  
  /* Font Weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* Line Heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  
  /* Border Radius */
  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.375rem;  /* 6px */
  --radius-lg: 0.5rem;    /* 8px */
  --radius-xl: 0.75rem;   /* 12px */
  --radius-2xl: 1rem;     /* 16px */
  --radius-full: 9999px;
  
  /* Enhanced Shadows - Unified Dark Theme */
  --shadow-sm: 0 1px 0 rgba(0, 0, 0, 0.1);
  --shadow-md: 0 3px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 12px 28px rgba(0, 0, 0, 0.5);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.6);

  /* Interactive shadows */
  --shadow-inset: inset 0 2px 4px 0 rgba(0, 0, 0, 0.3);
  --shadow-focus: 0 0 0 3px rgba(88, 166, 255, 0.4);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.2), 0 8px 24px rgba(0, 0, 0, 0.3);
  --shadow-interactive: 0 1px 3px 0 rgba(0, 0, 0, 0.2), 0 1px 2px 0 rgba(0, 0, 0, 0.15);
  --shadow-floating: 0 8px 24px rgba(0, 0, 0, 0.4);
  
  /* Enhanced Transitions - Smooth Learning Experience */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 400ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --transition-spring: 300ms cubic-bezier(0.175, 0.885, 0.32, 1.275);
  
  /* Layout - GitHub Style */
  --container-max: 1280px;
  --container-padding: var(--space-4);
  --header-height: 72px;
  --sidebar-width: 296px;
  
  /* GitHub-specific layout */
  --content-max-width: 1012px;
  --sidebar-max-width: 296px;
  
  /* Responsive Breakpoints - Standardized */
  --breakpoint-xs: 320px;
  --breakpoint-sm: 576px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 992px;
  --breakpoint-xl: 1200px;
  --breakpoint-2xl: 1400px;
  
  /* Container Sizes - Responsive */
  --container-xs: 100%;
  --container-sm: 540px;
  --container-md: 720px;
  --container-lg: 960px;
  --container-xl: 1140px;
  --container-2xl: 1320px;
  
  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;

  color-scheme: dark;
}

:root[data-theme="dark"] {
  color-scheme: dark;
}

html[data-text-size="comfortable"] {
  font-size: 17px;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;
}

html[data-text-size="large"] {
  font-size: 18px;
  --leading-normal: 1.7;
  --leading-relaxed: 1.85;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-fast: 0ms;
    --transition-normal: 0ms;
    --transition-slow: 0ms;
  }
}
/* Reset and Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  line-height: var(--leading-normal);
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

.no-scroll {
  overflow: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

a {
  color: var(--color-text-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Lists */
ul, ol {
  list-style: none;
}

/* Images */
img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Form Elements */
input, button, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

/* Focus Management */
:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  text-decoration: none;
  z-index: var(--z-toast);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 6px;
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  width: 100%;
}

/* Responsive Typography */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }
  h3 { font-size: var(--text-xl); }
}

@media (max-width: 480px) {
  .page__main {
    padding: var(--space-5) var(--space-4) var(--space-8);
  }

  .dark-page {
    padding: var(--space-5) var(--space-4) var(--space-8);
    gap: var(--space-xl);
  }

  .dark-content {
    padding: var(--space-xl) var(--space-lg);
    gap: var(--space-lg);
  }

  .simple-list {
    grid-template-columns: 1fr;
  }

  .hero-card {
    padding: var(--space-xl);
  }
}

@media (min-width: 1024px) {
  .page__main {
    padding: var(--space-10) var(--space-8) var(--space-12);
    gap: var(--space-4xl);
  }

  .dark-page {
    padding: var(--space-10) var(--space-8) var(--space-14);
  }

  .dark-content {
    padding: var(--space-4xl);
    gap: var(--space-3xl);
  }

  .hero--split {
    flex-direction: row;
    align-items: stretch;
    gap: var(--space-12);
  }

  .hero--split .hero__content {
    flex: 1 1 0;
    padding-right: var(--space-12);
  }

  .hero--split .hero__aside {
    flex: 0 0 360px;
    margin: 0;
    align-self: stretch;
  }

  .hero-card {
    height: 100%;
  }
}

/* Print Styles */
@media print {
  * {
    background: white !important;
    color: black !important;
    box-shadow: none !important;
  }
  
  .no-print {
    display: none !important;
  }
}

/* Components */
/* Enhanced Button Components - Modern French Learning Theme */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  line-height: 1.45;
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  min-height: 48px;
  white-space: nowrap;
  position: relative;
  user-select: none;
  background: linear-gradient(145deg, transparent, transparent);
  overflow: hidden;
  transform: translateY(0);
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-spring);
}

.btn:hover::before {
  left: 100%;
}

.btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn:active:not(:disabled) {
  transform: translateY(0);
  transition: transform var(--transition-fast);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
  transform: none;
}

.btn:focus-visible {
  box-shadow: var(--shadow-focus);
  outline: none;
  transform: translateY(-1px);
}

/* Enhanced button loading state */
.btn--loading {
  cursor: wait;
  position: relative;
}

.btn--loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-left: var(--space-2);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Enhanced Primary Button - French Theme */
.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.btn--primary:hover {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn--primary:active {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  transform: translateY(1px);
  box-shadow: var(--shadow-sm);
}

/* Enhanced Secondary Button - French Theme */
.btn--secondary {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  border-color: var(--color-border-default);
  box-shadow: var(--shadow-sm);
}

.btn--secondary:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-border-muted);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--secondary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* Enhanced Ghost Button */
.btn--ghost {
  background: var(--color-bg-subtle);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-default);
  font-weight: var(--font-medium);
}

.btn--ghost:hover {
  background: var(--color-bg-interactive);
  color: var(--color-text-primary);
  border-color: var(--color-border-interactive);
  transform: translateY(-1px);
}

/* Danger Button - Unified Dark Theme */
.btn--danger {
  background: var(--color-error);
  color: var(--color-text-inverse);
  border-color: var(--color-border-error);
  box-shadow: var(--shadow-sm), var(--shadow-inset);
}

.btn--danger:hover {
  background: var(--color-error-light);
  border-color: var(--color-border-error);
  color: var(--color-text-inverse);
}

/* Success Button - Unified Dark Theme */
.btn--success {
  background: var(--color-success);
  color: var(--color-text-inverse);
  border-color: var(--color-border-success);
  box-shadow: var(--shadow-sm), var(--shadow-inset);
}

.btn--success:hover {
  background: var(--color-success-light);
  border-color: var(--color-border-success);
  color: var(--color-text-inverse);
}

/* Button Sizes - GitHub Style */
.btn--sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  min-height: 28px;
}

.btn--lg {
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-base);
  min-height: 40px;
}

.btn--xl {
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-lg);
  min-height: 48px;
}

/* Icon Button - GitHub Style */
.btn--icon {
  width: 48px;
  height: 48px;
  padding: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-secondary);
  border: none;
}

/* Unified dark theme header button styles */
.header .btn--icon {
  color: var(--color-text-inverse);
}

.btn--icon:hover {
  background: var(--color-bg-interactive);
  color: var(--color-text-primary);
}

.header .btn--icon:hover {
  background: var(--color-bg-interactive);
  color: var(--color-text-inverse);
}

.btn--icon svg,
.btn--icon .material-icons {
  width: 16px;
  height: 16px;
}

/* Floating Action Button */
.btn--fab {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-lg);
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  z-index: var(--z-fixed);
}

.btn--fab:hover {
  background: var(--color-primary-dark);
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
}

/* Full Width Button */
.btn--full {
  width: 100%;
}

/* Button Group */
.btn-group {
  display: inline-flex;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.btn-group .btn {
  border-radius: 0;
  border-right-width: 0;
  margin: 0;
}

.btn-group .btn:first-child {
  border-top-left-radius: var(--radius-md);
  border-bottom-left-radius: var(--radius-md);
}

.btn-group .btn:last-child {
  border-top-right-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
  border-right-width: 1px;
}

.btn-group .btn:focus-visible {
  z-index: 1;
  position: relative;
}

/* Loading State */
.btn--loading {
  position: relative;
  color: transparent;
}

.btn--loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Responsive Button Adjustments - Mobile-First */
@media (max-width: 768px) {
  .btn {
    min-height: 48px; /* Maintain mobile touch targets */
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-base);
    border-radius: var(--radius-lg);
  }
  
  .btn--icon {
    width: 48px;
    height: 48px;
  }
  
  .btn--fab {
    bottom: var(--space-lg);
    right: var(--space-lg);
  }
  
  .btn-group {
    flex-direction: column;
  }
  
  .btn-group .btn {
    border-right-width: 1px;
    border-bottom-width: 0;
  }
  
  .btn-group .btn:first-child {
    border-radius: var(--radius-md) var(--radius-md) 0 0;
  }
  
  .btn-group .btn:last-child {
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    border-bottom-width: 1px;
  }
}

/* Enhanced touch targets for small mobile screens */
@media (max-width: 480px) {
  .btn {
    min-height: 52px; /* Larger touch targets on small screens */
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
    border-radius: var(--radius-xl);
  }
  
  .btn--sm {
    min-height: 40px;
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
  }
}

/* Favorites Button */
.favorites-btn {
  background: transparent;
  border: none;
  padding: var(--space-2);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-normal);
  color: var(--color-text-muted);
  min-width: 32px;
  min-height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
}

.favorites-btn:hover {
  background: var(--color-background-secondary);
  color: var(--color-primary);
  transform: scale(1.1);
}

.favorites-btn.favorited {
  color: var(--color-error);
}

.favorites-btn.favorited:hover {
  color: var(--color-error-dark);
}

.favorites-btn .material-icons {
  font-size: 18px;
  transition: all var(--transition-normal);
}

/* Favorites Feedback Toast */
.favorites-feedback {
  position: fixed;
  top: 80px;
  right: var(--space-6);
  background: var(--color-background-elevated);
  color: var(--color-text);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  z-index: var(--z-toast);
  transform: translateX(100%);
  opacity: 0;
  transition: all var(--transition-spring);
  border-left: 3px solid var(--color-success);
}

.favorites-feedback.negative {
  border-left-color: var(--color-warning);
}

.favorites-feedback.show {
  transform: translateX(0);
  opacity: 1;
}

.favorites-feedback .material-icons {
  font-size: 16px;
  color: var(--color-success);
}

.favorites-feedback.negative .material-icons {
  color: var(--color-warning);
}
/* Enhanced Card Component - Modern French Learning Theme */
.card {
  background: var(--color-bg-card) !important;
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
  overflow: hidden;
  position: relative;
  backdrop-filter: blur(8px);
  color: var(--color-text-primary) !important;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent), var(--color-primary));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-floating);
  border-color: var(--color-border-interactive);
  transform: translateY(-4px);
}

/* Enhanced card interaction effects */
.card--success {
  border-color: var(--color-success);
  background: linear-gradient(135deg, var(--color-bg-card), var(--color-success-bg));
}

.card--success::before {
  background: var(--color-success);
  opacity: 1;
}

.card--warning {
  border-color: var(--color-warning);
  background: linear-gradient(135deg, var(--color-bg-card), var(--color-warning-bg));
}

.card--error {
  border-color: var(--color-error);
  background: linear-gradient(135deg, var(--color-bg-card), var(--color-error-bg));
}

/* Loading card state */
.card--loading {
  pointer-events: none;
}

.card--loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg-overlay);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.card:hover::before {
  opacity: 1;
}

.card--interactive {
  cursor: pointer;
}

.card--interactive:hover {
  border-color: var(--color-primary);
  transform: translateY(-6px) scale(1.02);
}

.card--interactive:focus-within {
  box-shadow: var(--shadow-focus);
  outline: none;
}

.card--interactive:active {
  transform: translateY(-2px) scale(1.01);
  transition-duration: 0.1s;
}

.card__header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--color-border-subtle);
  background: linear-gradient(135deg, var(--color-bg-subtle), var(--color-bg-secondary));
}

.card__body {
  padding: var(--space-6);
}

.card__footer {
  padding: var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
  background: var(--color-bg-subtle);
}

/* Grade Card Component - Clean Mobile-First Design */
.grade-card {
  position: relative;
  padding: var(--space-lg);
  display: block;
  text-decoration: none;
  color: inherit;
  min-height: 96px;
  background: var(--color-bg-canvas);
  transition: all var(--transition-normal);
}

.grade-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}

.grade-card:hover .grade-card__level-badge {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.grade-card:hover .grade-card__cta {
  color: var(--color-primary-dark);
  font-weight: var(--font-semibold);
}

.grade-card__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  height: 100%;
}

.grade-card__level-info {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex: 1;
  min-width: 0;
}

.grade-card__level-badge {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  box-shadow: var(--shadow-md);
}

.grade-card__level-number {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: white;
  text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.grade-card__details {
  flex: 1;
  min-width: 0;
}

.grade-card__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-xs);
  color: var(--color-text-primary) !important;
  line-height: var(--leading-tight);
}

.grade-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.grade-card__difficulty {
  display: inline-flex;
  align-items: center;
  padding: 3px var(--space-2);
  background: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border: 1px solid rgba(var(--color-primary-rgb), 0.2);
}

.grade-card__lessons,
.grade-card__progress-text {
  font-size: var(--text-xs);
  color: var(--color-text-secondary) !important;
  font-weight: var(--font-medium);
}

.grade-card__action {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  flex-shrink: 0;
}

.grade-card__cta {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-primary);
  white-space: nowrap;
}

.grade-card__arrow {
  width: 24px;
  height: 24px;
  color: var(--color-primary) !important;
  transition: transform var(--transition-fast);
}

.grade-card:hover .grade-card__arrow {
  transform: translateX(4px);
}

.grade-accordion {
  background: var(--color-surface-elevated, rgba(17, 24, 39, 0.85));
  border: 1px solid var(--color-border-muted, rgba(148, 163, 184, 0.2));
  border-radius: 18px;
  margin: 0 0 var(--space-5, 1.5rem);
  padding: 0;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  overflow: hidden;
}

.grade-accordion:hover,
.grade-accordion[open] {
  border-color: var(--color-primary, #60a5fa);
  box-shadow: 0 20px 45px -25px rgba(56, 189, 248, 0.5);
}

.grade-accordion__summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: var(--space-5, 1.5rem) var(--space-6, 1.75rem);
  cursor: pointer;
}

.grade-accordion__summary::-webkit-details-marker {
  display: none;
}

.grade-accordion__summary:focus-visible {
  outline: 2px solid var(--color-focus-ring, #93c5fd);
  outline-offset: 4px;
}

.grade-accordion__summary-main {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex: 1;
}

.grade-accordion__badge {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.8), rgba(147, 197, 253, 0.8));
  color: #0b1120;
  font-weight: 700;
  font-size: 1.5rem;
  min-width: 3rem;
  min-height: 3rem;
  display: grid;
  place-items: center;
  border-radius: 1rem;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.25);
}

.grade-accordion__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 0.35rem;
}

.grade-accordion__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  color: var(--color-text-subtle, rgba(226, 232, 240, 0.75));
  font-size: 0.95rem;
}

.grade-accordion__difficulty {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--color-primary, #60a5fa);
}

.grade-accordion__chevron {
  transition: transform 0.2s ease;
  color: var(--color-text-muted, rgba(148, 163, 184, 0.9));
}

.grade-accordion[open] .grade-accordion__chevron {
  transform: rotate(180deg);
}

.grade-accordion__content {
  padding: 0 var(--space-6, 1.75rem) var(--space-6, 1.75rem);
  display: grid;
  gap: var(--space-5, 1.5rem);
  max-width: 100%;
  overflow-wrap: anywhere;
}

.grade-accordion__progress {
  display: grid;
  gap: 0.6rem;
}

.grade-accordion__progress-track {
  width: 100%;
  height: 0.5rem;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.25);
  overflow: hidden;
}

.grade-accordion__progress-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, rgba(96, 165, 250, 0.9), rgba(129, 140, 248, 0.9));
  transition: width 0.3s ease;
}

.grade-accordion__progress-label {
  font-size: 0.95rem;
  color: var(--color-text-subtle, rgba(226, 232, 240, 0.8));
}

.grade-accordion__highlights {
  display: grid;
  gap: 0.75rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.grade-accordion__highlights li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  font-size: 0.98rem;
  color: var(--color-text-primary, #e2e8f0);
}

.grade-accordion__highlights li::before {
  content: '✔';
  font-size: 0.85rem;
  color: var(--color-success, #34d399);
  margin-top: 0.2rem;
}

.grade-accordion__actions {
  display: flex;
  justify-content: flex-end;
}

.grade-accordion__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: rgba(37, 99, 235, 0.15);
  border-radius: 999px;
  color: var(--color-primary, #60a5fa);
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.2s ease;
}

.grade-accordion__cta:hover,
.grade-accordion__cta:focus-visible {
  background: rgba(59, 130, 246, 0.25);
  transform: translateY(-1px);
}

.grade-accordion__cta:focus-visible {
  outline: 2px solid var(--color-focus-ring, rgba(59, 130, 246, 0.6));
  outline-offset: 3px;
}

.grade-accordion__cta-label {
  letter-spacing: 0.02em;
}

@media (max-width: 900px) {
  .grade-accordion__summary {
    padding: var(--space-5, 1.5rem);
  }

  .grade-accordion__summary-main {
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .grade-accordion {
    margin-bottom: var(--space-4, 1.25rem);
  }

  .grade-accordion__summary {
    flex-direction: column;
    align-items: flex-start;
  }

  .grade-accordion__summary-main {
    width: 100%;
  }

  .grade-accordion__actions {
    justify-content: flex-start;
  }
}

@media (max-width: 480px) {
  .grade-accordion__summary {
    padding: var(--space-4);
  }

  .grade-accordion__badge {
    font-size: 1.25rem;
    min-width: 2.5rem;
    min-height: 2.5rem;
  }

  .grade-accordion__title {
    font-size: 1.1rem;
  }

  .grade-accordion__actions {
    width: 100%;
    flex-wrap: wrap;
    gap: var(--space-3);
  }

  .grade-accordion__cta {
    width: 100%;
    justify-content: center;
  }
}

/* Lesson Card Component */
.lesson-card {
  position: relative;
  text-decoration: none;
  color: inherit;
  display: block;
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-canvas) 100%) !important;
}

.lesson-card__content {
  padding: var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.lesson-card__main {
  flex: 1;
  min-width: 0;
}

.lesson-card__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-xs);
  color: var(--color-text-primary) !important;
  line-height: 1.4;
}

.lesson-card__description {
  font-size: var(--text-base);
  color: var(--color-text-secondary) !important;
  margin-bottom: var(--space-sm);
  line-height: 1.5;
}

.lesson-card__type {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  text-transform: capitalize;
}



/* Unified dark theme lesson card type styles */
.lesson-card__type--debutant {
  background: #1a5646;
  color: #34d399;
}

.lesson-card__type--intermediaire {
  background: #5d4e2a;
  color: #fbbf24;
}

.lesson-card__type--avance {
  background: #7c3251;
  color: #f9a8d4;
}

.lesson-card__type--conversationnel {
  background: #1e3a5a;
  color: #7dd3fc;
}

.lesson-card__type--culturel {
  background: #581c87;
  color: #c4b5fd;
}

.lesson-card__type--histoire {
  background: #5d2a2a;
  color: #f87171;
}

.lesson-card__arrow {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  color: var(--color-text-tertiary);
  transition: transform var(--transition-fast);
}

.lesson-card:hover .lesson-card__arrow {
  transform: translateX(4px);
}

/* Progress Card */
.progress-card {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-text-inverse);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  text-align: center;
}

.progress-card__value {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-xs);
}

.progress-card__label {
  font-size: var(--text-base);
  opacity: 0.9;
}

/* Responsive Cards */
@media (max-width: 768px) {
  .card__header,
  .card__body,
  .card__footer {
    padding: var(--space-lg);
  }
  
  .grade-card {
    padding: var(--space-lg);
    min-height: 104px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
  }
  
  .grade-card__content {
    gap: var(--space-md);
  }
  
  .grade-card__level-info {
    gap: var(--space-md);
  }
  
  .grade-card__level-badge {
    width: 56px;
    height: 56px;
  }
  
  .grade-card__level-number {
    font-size: var(--text-xl);
  }
  
  .grade-card__title {
    font-size: var(--text-lg);
    margin-bottom: var(--space-xs);
  }
  
  .grade-card__meta {
    gap: var(--space-sm);
  }
  
  .grade-card__difficulty {
    font-size: var(--text-xs);
  }
  
  .grade-card__lessons,
  .grade-card__progress-text {
    font-size: var(--text-xs);
  }
  
  .grade-card__cta {
    font-size: var(--text-xs);
  }
  
  .grade-card__arrow {
    width: 20px;
    height: 20px;
  }
  
  .lesson-card__content {
    padding: var(--space-lg);
    gap: var(--space-md);
  }
  
  .lesson-card__title {
    font-size: var(--text-lg);
  }
}

/* Extra small screens - more compact layout */
@media (max-width: 480px) {
  .grade-card {
    padding: var(--space-md);
    min-height: 80px;
  }
  
  .grade-card__content {
    gap: var(--space-sm);
  }
  
  .grade-card__level-info {
    gap: var(--space-sm);
  }
  
  .grade-card__level-badge {
    width: 48px;
    height: 48px;
  }
  
  .grade-card__level-number {
    font-size: var(--text-base);
  }
  
  .grade-card__title {
    font-size: var(--text-base);
  }
  
  .grade-card__meta {
    gap: var(--space-xs);
    flex-direction: column;
    align-items: flex-start;
  }
  
  .grade-card__action {
    gap: 2px;
  }
  
  .grade-card__cta {
    font-size: var(--text-xs);
  }
  
  .grade-card__arrow {
    width: 18px;
    height: 18px;
  }
}

/* Lessons Layout */
.page--lessons .lessons-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.lessons-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.lessons-hero {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-2xl) var(--space-xl);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(37, 99, 235, 0.04));
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: var(--shadow-md);
}

.lessons-hero__details {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.lessons-hero__details span {
  display: inline-flex;
  gap: var(--space-xs);
  align-items: center;
}

.lessons-hero__count {
  font-weight: 600;
  color: var(--color-text-primary);
}

.lessons-hero__breadcrumb {
  gap: var(--space-xs);
}

.lessons-toolbar {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-xl);
  border-radius: var(--radius-xl);
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-sm);
}

.lessons-toolbar__search {
  width: 100%;
}

.lessons-toolbar__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
}

@media (max-width: 640px) {
  .lessons-hero {
    padding: var(--space-xl) var(--space-lg);
  }

  .lessons-hero__details {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }

  .lessons-toolbar__actions {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
  }

  .lessons-toolbar__filters,
  .filters-summary {
    width: 100%;
    justify-content: center;
  }
}

.lessons-toolbar__filters {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-default);
  background: var(--color-bg-subtle);
  color: var(--color-text-primary);
  font-weight: var(--font-medium);
  transition: all var(--transition-fast);
}

.lessons-toolbar__filters .material-icons {
  font-size: 20px;
}

.lessons-toolbar__filters:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-border-muted);
}

.lessons-info-card {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-xl);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.16), rgba(59, 130, 246, 0.08));
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: var(--shadow-sm);
  align-items: flex-start;
}

.lessons-info-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: rgba(34, 197, 94, 0.18);
  color: var(--color-text-primary);
  flex-shrink: 0;
}

.lessons-info-card__icon .material-icons {
  font-size: 28px;
}

.lessons-info-card__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.lessons-info-card__content h2 {
  margin: 0;
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.lessons-info-card__content p {
  margin: 0;
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.lessons-info-card__content ul {
  margin: 0;
  padding-left: var(--space-xl);
  color: var(--color-text-secondary);
  display: grid;
  gap: var(--space-xs);
}

.lessons-info-card__hint {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

.lesson-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.lesson-card__tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  background: rgba(148, 163, 184, 0.2);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.lesson-card__tag--spiral {
  background: rgba(34, 197, 94, 0.12);
  color: var(--color-text-secondary);
  border: 1px solid rgba(34, 197, 94, 0.25);
}

.lesson-card__note {
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  line-height: var(--leading-tight);
}

.lesson-card__tag--solo {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border: 1px solid rgba(245, 158, 11, 0.6);
}

@media (max-width: 768px) {
  .lessons-info-card {
    flex-direction: column;
    align-items: stretch;
  }

  .lessons-info-card__icon {
    width: 48px;
    height: 48px;
  }
}

.filters-summary {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.lessons-filters-panel {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  transform: translateY(100%);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  box-shadow: 0 -16px 40px rgba(15, 23, 42, 0.35);
  max-height: 75vh;
  overflow-y: auto;
  padding: var(--space-lg) var(--space-xl);
  z-index: var(--z-modal);
  pointer-events: none;
  opacity: 0;
}

.lessons-filters-panel.is-open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.lessons-filters-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.lessons-filters-panel__header h2 {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
}

.sheet-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(2px);
  z-index: calc(var(--z-modal) - 1);
  opacity: 0;
  transition: opacity var(--transition-normal);
  display: none;
}

.sheet-overlay.is-visible {
  display: block;
  opacity: 1;
}

.lessons-empty {
  margin-top: var(--space-xl);
  padding: var(--space-2xl) var(--space-xl);
  border-radius: var(--radius-xl);
  border: 1px dashed var(--color-border-muted);
  text-align: center;
  background: rgba(37, 99, 235, 0.08);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.lessons-empty__icon .material-icons {
  font-size: 48px;
  color: var(--color-text-link);
}

.lessons-empty h2 {
  margin: 0;
}

.lessons-empty p {
  margin: 0;
  color: var(--color-text-secondary);
  max-width: 360px;
}

.lessons-empty.hidden {
  display: none;
}

.lessons-support {
  margin-top: var(--space-2xl);
  display: flex;
  justify-content: center;
}

/* Enhanced Lesson Cards - Mobile-First Design */
.lessons-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.lesson-card-wrapper {
  position: relative;
}

.lesson-accordion {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  color: var(--color-text-primary);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  overflow: hidden;
}

.lesson-accordion:hover {
  border-color: var(--color-border-interactive);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.lesson-accordion[open] {
  border-color: var(--color-border-interactive);
  box-shadow: var(--shadow-lg);
}

.lesson-accordion__summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: var(--space-md);
  align-items: center;
  padding: var(--space-lg);
  cursor: pointer;
  list-style: none;
  outline: none;
  background: transparent;
}

.lesson-accordion__summary::-webkit-details-marker {
  display: none;
}

.lesson-accordion__summary:focus-visible {
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.35);
  border-radius: var(--radius-xl);
}

.lesson-accordion__summary-main {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  min-width: 0;
  grid-column: 1;
}

.lesson-accordion__title {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: 600;
  color: inherit;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lesson-accordion__type {
  align-self: flex-start;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  background: rgba(96, 165, 250, 0.15);
  color: var(--color-text-link);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.lesson-accordion__summary-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-xs);
  min-width: max-content;
  grid-column: 2;
}

.lesson-accordion__activities {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

.lesson-accordion__chevron {
  font-size: 28px;
  color: var(--color-text-tertiary);
  transition: transform var(--transition-fast);
  grid-column: 3;
}

@media (max-width: 640px) {
  .lesson-accordion__summary {
    grid-template-columns: minmax(0, 1fr);
    align-items: flex-start;
  }

  .lesson-accordion__summary-meta {
    grid-column: 1;
    align-items: flex-start;
    min-width: 0;
    width: 100%;
  }

  .lesson-accordion__chevron {
    grid-column: 1;
    justify-self: flex-end;
  }

  .lesson-accordion__actions {
    flex-wrap: wrap;
    gap: var(--space-3);
  }

  .lesson-accordion__cta {
    width: 100%;
    justify-content: center;
  }
}

.lesson-accordion[open] .lesson-accordion__chevron {
  transform: rotate(180deg);
}

.lesson-accordion__content {
  padding: 0 var(--space-lg) var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  border-top: 1px solid var(--color-border-muted);
  max-width: 100%;
  overflow-wrap: anywhere;
}

.lesson-accordion__description {
  margin: 0;
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.lesson-accordion__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.lesson-accordion__meta-item {
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--color-border-muted);
  background: rgba(148, 163, 184, 0.12);
}

.lesson-accordion__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.lesson-accordion__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 0.65rem 1.2rem;
  border-radius: var(--radius-lg);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  text-decoration: none;
  font-weight: 600;
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.lesson-accordion__cta:hover,
.lesson-accordion__cta:focus-visible {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
}

.lesson-accordion__cta:active {
  transform: translateY(1px);
}

.lesson-accordion__cta-label {
  white-space: nowrap;
}

.lesson-accordion .lesson-card__favorite {
  position: static;
  top: auto;
  right: auto;
  margin-left: auto;
  background: rgba(148, 163, 184, 0.12);
  border-radius: var(--radius-full);
}

@media (max-width: 767px) {
  .lesson-accordion__summary {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: var(--space-sm);
  }

  .lesson-accordion__summary-meta {
    flex-direction: row;
    align-items: flex-start;
    justify-content: flex-start;
    gap: var(--space-sm);
    min-width: 0;
    flex-wrap: wrap;
    grid-column: 1 / -1;
  }

  .lesson-accordion__title {
    white-space: normal;
  }

  .lesson-accordion__chevron {
    justify-self: end;
    grid-column: 2;
    grid-row: 1;
  }

  .lesson-accordion__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .lesson-accordion .lesson-card__favorite {
    position: static;
    top: auto;
    right: auto;
    margin-left: 0;
    align-self: flex-end;
    background: rgba(148, 163, 184, 0.12);
  }
}

.lesson-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  text-decoration: none;
  color: inherit;
  position: relative;
  min-height: 120px;
  box-shadow: var(--shadow-sm);
}

.lesson-card:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}

.lesson-card__content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-md);
  flex: 1;
}

.lesson-card__main {
  flex: 1;
  min-width: 0;
}

.lesson-card__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.lesson-card__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  line-height: 1.4;
  margin: 0;
}

.lesson-card__description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin: 0;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.lesson-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-md);
  margin-top: var(--space-xs);
}

.lesson-card__activities {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.lesson-card__status {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-weight: var(--font-medium);
}

.lesson-card__status--completed {
  background: rgba(34, 197, 94, 0.1);
  color: #22c55e;
}

.lesson-card__status--in-progress {
  background: rgba(59, 130, 246, 0.1);
  color: #3b82f6;
}

.lesson-card__status--not-started {
  background: rgba(107, 114, 128, 0.1);
  color: var(--color-text-tertiary);
}

.lesson-card__action {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  min-width: 80px;
}

.lesson-card__cta {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-primary);
  text-align: center;
}

.lesson-card__arrow {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.lesson-card:hover .lesson-card__arrow {
  transform: translateX(4px);
}

.lesson-card__favorite {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: none;
  border: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  z-index: 2;
}

.lesson-card__favorite:hover {
  background: rgba(107, 114, 128, 0.1);
  color: var(--color-text-secondary);
}

.lesson-card__favorite.favorited {
  color: #ef4444;
}

.lesson-card__favorite.favorited:hover {
  background: rgba(239, 68, 68, 0.1);
}

/* Lessons Controls */
.lessons-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
  margin-top: var(--space-xl);
}

/* Responsive Design for Lessons */
@media (min-width: 768px) {
  .lessons-toolbar {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .lessons-toolbar__search {
    max-width: 420px;
  }

  .lessons-toolbar__actions {
    justify-content: flex-end;
  }

  .lessons-grid {
    display: flex;
    flex-direction: column;
    gap: clamp(var(--space-md), 2vw, var(--space-lg));
  }

  .lessons-actions {
    justify-content: flex-start;
  }
}

@media (min-width: 1024px) {
  .lessons-content {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: var(--space-xl);
    align-items: flex-start;
  }

  .lessons-toolbar {
    grid-column: 1 / -1;
  }

  .lessons-toolbar__filters {
    display: none;
  }

  .lessons-filters-panel {
    position: sticky;
    top: calc(var(--header-height, 72px) + var(--space-lg));
    transform: none;
    opacity: 1;
    pointer-events: auto;
    max-height: calc(100vh - var(--header-height, 72px) - var(--space-3xl));
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
  }

  .lessons-filters-panel__header {
    display: none;
  }

  .sheet-overlay {
    display: none !important;
  }

  .lessons-grid,
  .lessons-empty,
  .pagination-container,
  .lessons-support {
    grid-column: 2 / -1;
  }
}

@media (min-width: 1200px) {
  .lessons-grid {
    display: flex;
    flex-direction: column;
    gap: clamp(var(--space-md), 1.5vw, var(--space-xl));
  }
}
/* Enhanced Header Component - Modern French Learning Theme */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  backdrop-filter: blur(12px);
  min-height: var(--header-height);
  width: 100%;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
}

/* Modern App Header */
.header.app-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  color: var(--header-on-surface);
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.9), rgba(30, 64, 175, 0.78));
  box-shadow: none;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  isolation: isolate;
}

.header.app-header::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: clamp(18px, 5vw, 44px);
  background: linear-gradient(
    to bottom,
    rgba(15, 23, 42, 0.15),
    rgba(15, 23, 42, 0)
  );
  pointer-events: none;
  z-index: -1;
}

.app-header__container {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: clamp(var(--space-sm), 2vw, var(--space-lg));
  padding: clamp(var(--space-xs), 1.8vw, var(--space-sm)) clamp(var(--space-md), 4vw, var(--space-xl));
  margin: 0 auto;
  max-width: var(--container-max);
  min-height: clamp(56px, 8vh, 72px);
  width: 100%;
  position: relative;
  z-index: 1;
}

.app-header__brand {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-sm), 2vw, var(--space-md));
  min-width: 0;
  grid-column: 1;
}

.app-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--header-on-surface);
  min-width: 0;
}

.app-header__menu.btn--icon,
.app-header__action.btn--icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.28);
  background: rgba(148, 163, 184, 0.14);
  color: var(--header-on-surface);
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.25);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform var(--transition-normal), background var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.app-header__menu.btn--icon:hover,
.app-header__menu.btn--icon:focus-visible,
.app-header__action.btn--icon:hover,
.app-header__action.btn--icon:focus-visible {
  background: rgba(96, 165, 250, 0.2);
  border-color: rgba(96, 165, 250, 0.4);
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.35);
  transform: translateY(-1px);
  outline: none;
}

.app-header__menu.btn--icon:active,
.app-header__action.btn--icon:active {
  transform: translateY(0);
}

.app-header__logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.app-header__logo-link:hover .app-header__logo,
.app-header__logo-link:focus-visible .app-header__logo {
  transform: scale(1.04);
  box-shadow: var(--shadow-md);
}

.app-header__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.app-header__title {
  font-size: clamp(var(--text-base), 2.8vw, var(--text-lg));
  font-weight: var(--font-semibold);
  color: var(--header-on-surface);
  margin: 0;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.app-header__subtitle {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--header-link);
  margin: 0;
}

.app-header__nav {
  display: none;
  align-items: center;
  justify-content: center;
  gap: clamp(var(--space-sm), 1.6vw, var(--space-md));
  grid-column: 1 / -1;
}

.app-header__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  color: var(--header-link);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  transition: color var(--transition-fast);
}

.app-header__link::after {
  content: '';
  position: absolute;
  left: var(--space-xs);
  right: var(--space-xs);
  bottom: -6px;
  height: 3px;
  border-radius: var(--radius-pill, 999px);
  background: var(--header-link-indicator);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-normal);
}

.app-header__link:hover,
.app-header__link:focus-visible {
  color: var(--header-link-active);
  outline: none;
}

.app-header__link:hover::after,
.app-header__link:focus-visible::after,
.app-header__link.is-active::after {
  transform: scaleX(1);
}

.app-header__link.is-active {
  color: var(--header-link-active);
}

.app-header__actions {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: clamp(var(--space-xs), 1.2vw, var(--space-sm));
  grid-column: 2;
}

.app-header__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  border-radius: var(--radius-lg);
  padding-inline: var(--space-md);
  box-shadow: 0 14px 30px rgba(37, 99, 235, 0.35);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.app-header__cta .material-icons {
  font-size: 18px;
}

.app-header__cta:hover,
.app-header__cta:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 18px 36px rgba(37, 99, 235, 0.45);
}

.app-header__cta-text {
  font-weight: var(--font-semibold);
}

@media (max-width: 1200px) {
  .app-header__container {
    gap: clamp(var(--space-sm), 2vw, var(--space-md));
    padding: var(--space-sm) var(--space-lg);
  }
}

@media (min-width: 720px) {
  .app-header__container {
    grid-template-columns: auto 1fr auto;
  }

  .app-header__nav {
    grid-column: 2;
  }

  .app-header__actions {
    grid-column: 3;
  }
}

@media (min-width: 960px) {
  .app-header__nav {
    display: flex;
  }

  .app-header__container {
    gap: clamp(var(--space-sm), 2vw, var(--space-lg));
  }
}

@media (max-width: 720px) {
  .app-header__actions {
    gap: var(--space-xs);
  }

  .app-header__cta {
    padding-inline: var(--space-sm);
  }
}

@media (max-width: 640px) {
  .app-header__container {
    padding: clamp(var(--space-xs), 1.2vw, var(--space-sm)) var(--space-md);
  }

  .app-header__title {
    font-size: var(--text-base);
  }

  .app-header__subtitle {
    display: none;
  }

  .app-header__actions .app-header__action.btn--icon {
    display: none;
  }

  .app-header__cta-text {
    display: none;
  }

  .header.app-header::after {
    bottom: -24px;
    height: 40px;
  }
}

@media (max-width: 480px) {
  .app-header__container {
    gap: var(--space-sm);
  }

  .app-header__brand {
    gap: var(--space-sm);
  }

  .app-header__menu.btn--icon,
  .app-header__action.btn--icon {
    width: 40px;
    height: 40px;
  }
}

/* Enhanced Button Icons - Mobile-First Touch Targets */
.btn--icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  padding: 0;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  color: var(--color-french-white);
  text-decoration: none;
  transition: all var(--transition-normal);
  backdrop-filter: blur(8px);
  position: relative;
  overflow: hidden;
}

.btn--icon::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.2) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.btn--icon:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn--icon:hover::before {
  opacity: 1;
}

.btn--icon:active {
  transform: translateY(0);
  transition: transform var(--transition-fast);
}

/* Enhanced Sidebar */
.sidebar {
  position: fixed;
  top: 0;
  left: -100%;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--color-bg-secondary);
  border-right: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-floating);
  transition: left var(--transition-spring);
  z-index: var(--z-modal);
  overflow-y: auto;
  backdrop-filter: blur(12px);
}

.sidebar.open {
  left: 0;
}

.sidebar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6);
  border-bottom: 1px solid var(--color-border-default);
  background: linear-gradient(135deg, var(--color-bg-secondary), var(--color-bg-tertiary));
}

.sidebar__logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.sidebar__content {
  padding: var(--space-6);
}

.sidebar__section {
  margin-bottom: var(--space-8);
}

.sidebar__section-title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
  padding-left: var(--space-2);
}

.sidebar__nav {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar__nav-item {
  margin-bottom: var(--space-1);
}

.sidebar__nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.sidebar__nav-link::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--color-primary);
  transform: scaleY(0);
  transition: transform var(--transition-normal);
}

.sidebar__nav-link:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  transform: translateX(8px);
}

.sidebar__nav-link:hover::before {
  transform: scaleY(1);
}

.sidebar__nav-link.active {
  background: var(--color-bg-accent);
  color: var(--color-primary);
  font-weight: var(--font-medium);
}

.sidebar__nav-link.active::before {
  transform: scaleY(1);
}

.sidebar__nav-icon {
  font-size: 20px;
  transition: transform var(--transition-normal);
}

.sidebar__nav-link:hover .sidebar__nav-icon {
  transform: scale(1.1);
}

/* Sidebar Overlay */
.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: var(--z-modal-backdrop);
  backdrop-filter: blur(2px);
}

.sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

@media (max-width: 520px) {
  .sidebar {
    border-radius: 0;
  }
}

/* Breadcrumbs Enhancement */
.breadcrumbs {
  display: block;
  padding: var(--space-4) var(--space-6);
  background: var(--color-bg-subtle);
  border-bottom: 1px solid var(--color-border-default);
  font-size: var(--text-sm);
}

.breadcrumb__list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb__node {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.breadcrumb__node.current {
  gap: var(--space-2);
}

.breadcrumb__item {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-normal);
}

.breadcrumb__item:hover {
  color: var(--color-text-primary);
}

.breadcrumb__item.current {
  color: var(--color-text-primary);
  font-weight: var(--font-medium);
}

.breadcrumb__separator {
  color: var(--color-text-muted);
  margin: 0 var(--space-1);
}

/* Animation Keyframes */
@keyframes logoGlow {
  0% {
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
  }
  100% {
    filter: drop-shadow(0 2px 8px rgba(96, 165, 250, 0.4));
  }
}

/* Responsive Navigation */
@media (max-width: 768px) {
  .header {
    padding-block: var(--space-2);
  }

  .header__container {
    padding: 0 var(--space-4);
    gap: var(--space-3);
  }

  .header__title {
    font-size: var(--text-lg);
  }

  .header__controls {
    gap: var(--space-2);
  }

  .sidebar {
    width: 280px;
  }

  .sidebar__content {
    padding: var(--space-4);
  }
}

@media (max-width: 540px) {
  .header__container {
    padding: 0 var(--space-3);
    gap: var(--space-2);
  }

  .header__left {
    gap: var(--space-2);
  }

  .header__logo {
    width: 32px;
    height: 32px;
  }

  .header__title {
    font-size: var(--text-md);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .header__controls {
    gap: var(--space-1);
  }

  .header .btn--icon {
    width: 38px;
    height: 38px;
  }
}

/* Progress Bar Enhancement */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: transparent;
  pointer-events: none;
  z-index: var(--z-toast);
}

.progress-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  width: 0%;
  transition: width var(--transition-normal);
  box-shadow: 0 0 10px rgba(96, 165, 250, 0.5);
}
}

.header__title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text-inverse);
  margin: 0;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  letter-spacing: -0.025em;
}

.header__controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 0 0 auto;
  flex-wrap: nowrap;
}

/* Sidebar Component */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--color-bg-primary);
  border-right: 1px solid var(--color-border-light);
  transform: translateX(-100%);
  transition: transform var(--transition-normal), visibility var(--transition-normal), opacity var(--transition-normal);
  z-index: var(--z-modal);
  overflow-y: auto;
  /* Improve accessibility and ensure proper hidden state */
  visibility: hidden;
  opacity: 0;
}

.sidebar.open {
  transform: translateX(0);
  /* Show the sidebar when open */
  visibility: visible;
  opacity: 1;
}

.sidebar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
  background: var(--color-bg-secondary);
}

.sidebar__logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
}

.sidebar__content {
  padding: var(--space-lg);
}

.sidebar__section {
  margin-bottom: var(--space-xl);
}

.sidebar__section-title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.sidebar__nav {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sidebar__nav-item {
  margin-bottom: var(--space-xs);
}

.sidebar__nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  min-height: 48px;
}

.sidebar__nav-link:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.sidebar__nav-link.active {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.sidebar__nav-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* Sidebar Update Section */
.sidebar__update-section {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.sidebar__update-actions {
  display: grid;
  gap: var(--space-sm);
}

.sidebar__update-hint {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  text-align: center;
}

.sidebar__version-info {
  margin-top: var(--space-md);
  text-align: center;
}

.version-info {
  margin-top: var(--space-lg);
  color: var(--color-text-secondary);
}

.version-text {
  color: var(--color-text-tertiary);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
}

#currentVersion {
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
  background: var(--color-bg-secondary);
  overflow-x: auto;
}

.breadcrumb__item {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.breadcrumb__item:hover {
  color: var(--color-primary);
}

.breadcrumb__item.current {
  color: var(--color-text-primary);
  font-weight: var(--font-medium);
}

.breadcrumb__separator {
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

/* Sidebar Overlay */
.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Progress Bar */
.progress-bar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-bg-tertiary);
  z-index: var(--z-fixed);
}

.progress-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width var(--transition-normal);
  width: 0%;
}

/* Footer */
.footer,
.app-footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border-light);
  padding: var(--space-xl) 0;
  margin-top: auto;
  width: 100%;
}

.footer__container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  text-align: center;
  flex-wrap: wrap;
}

.footer__left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.footer__right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .app-footer .footer__container {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-md);
  }

  .app-footer .footer__left,
  .app-footer .footer__right {
    width: 100%;
    justify-content: center;
  }
}

.footer__version {
  color: var(--color-text-tertiary);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  background: var(--color-bg-tertiary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
}

.footer__update-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-primary);
  background: transparent;
  color: var(--color-primary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: background var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast);
}

.footer__update-btn:hover,
.footer__update-btn:focus-visible {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary-dark, var(--color-primary));
  outline: none;
}

.footer__update-btn .material-icons {
  font-size: 18px;
}

.footer__update-btn--danger {
  border-color: var(--color-error);
  color: var(--color-error);
}

.footer__update-btn--danger .material-icons {
  color: inherit;
}

.footer__update-btn--danger:hover,
.footer__update-btn--danger:focus-visible {
  background: var(--color-error);
  color: var(--color-white);
  border-color: var(--color-error-dark, var(--color-error));
}

.footer__debug-btn {
  background: none;
  border: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer__debug-btn:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
}

.footer__debug-btn .material-icons {
  font-size: 18px;
}

.footer__text {
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.footer__link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: var(--font-medium);
}

.footer__link:hover {
  text-decoration: underline;
}

.debug-inspector {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.debug-inspector__entry {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.debug-inspector__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

.debug-inspector__section-title {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-1);
}

.debug-inspector__code {
  font-family: var(--font-family-mono);
  font-size: var(--text-xs);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
  padding: var(--space-2);
  word-break: break-word;
}

.debug-inspector__empty {
  border: 1px dashed var(--color-border-muted);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  color: var(--color-text-tertiary);
  background: var(--color-bg-secondary);
}

.alert {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  padding: var(--space-3);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-muted);
  background: var(--color-bg-secondary);
}

.alert--info {
  border-color: rgba(37, 99, 235, 0.2);
  background: rgba(37, 99, 235, 0.08);
}

.alert__title {
  font-weight: var(--font-semibold);
  margin: 0 0 var(--space-1) 0;
  color: var(--color-text-primary);
}

.alert__description {
  margin: 0;
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* Responsive Navigation */
@media (max-width: 768px) {
  .header__title {
    display: none;
  }
  
  .sidebar {
    width: 100vw;
    max-width: 320px;
  }
  
  .breadcrumbs {
    padding: var(--space-sm) var(--space-md);
  }
  
  .sidebar__content {
    padding: var(--space-md);
  }
  
  .sidebar__nav-link {
    padding: var(--space-md) var(--space-lg);
    min-height: 52px;
  }
  
  .footer__container {
    padding: 0 var(--space-md);
  }
}

@media (max-width: 480px) {
  .header__container {
    padding: 0 var(--space-md);
  }
  
  .footer__container {
    flex-direction: column;
    gap: var(--space-md);
    padding: 0 var(--space-md);
    text-align: center;
  }
  
  .footer__left {
    justify-content: center;
  }
  
  .footer__right {
    order: -1;
    justify-content: center;
  }
}
/* Enhanced Activity Components - Modern French Learning Theme */

/* Activity Page Layout */
.activity-page {
  min-height: 100vh;
  background: var(--color-bg-canvas);
  padding: var(--space-6) 0;
}

/* Enhanced Feedback System */
.feedback-message {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-lg);
  font-weight: var(--font-medium);
  font-size: var(--text-base);
  margin-top: var(--space-4);
  border: 1px solid;
  animation: slideInBounce 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  box-shadow: var(--shadow-sm);
}

.feedback-message.success {
  background: var(--color-success-bg);
  border-color: var(--color-success);
  color: var(--color-text-success);
}

.feedback-message.error {
  background: var(--color-error-bg);
  border-color: var(--color-error);
  color: var(--color-text-error);
}

.feedback-message.info {
  background: var(--color-info-bg);
  border-color: var(--color-info);
  color: var(--color-text-primary);
}

.feedback-message .material-icons {
  font-size: 24px;
}

/* Enhanced Activity State Indicators */
.activity-state {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-default);
}

/* IMPROVED Flashcard Styling - Enhanced Visual Hierarchy with Mobile Support */
.flashcards-activity {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-6);
}

.flashcards-list {
  display: grid;
  gap: var(--space-8);
  margin: var(--space-6) 0;
}

.flashcard {
  position: relative;
  min-height: 180px;
  perspective: 1200px;
  margin-bottom: var(--space-2);
}

/* Mobile Responsiveness for Flashcards */
@media (max-width: 768px) {
  .flashcards-activity {
    padding: var(--space-4);
    max-width: 100%;
  }
  
  .flashcards-list {
    gap: var(--space-6);
    margin: var(--space-4) 0;
  }
  
  .flashcard {
    min-height: 160px;
  }
}

/* IMPROVED - Better structure with enhanced visual appeal and mobile support */
.flashcard__inner {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 180px;
  text-align: center;
  transition: transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  transform-style: preserve-3d;
  background: var(--color-bg-card);
  border: 2px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.flashcard__inner:hover {
  border-color: var(--color-primary);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

/* Mobile optimizations for flashcard inner */
@media (max-width: 768px) {
  .flashcard__inner {
    min-height: 160px;
    border-width: 1px;
  }
  
  .flashcard__inner:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  }
}

.flashcard__inner.flipped {
  /* Remove rotateY transform to prevent mirrored text - we use opacity/visibility instead */
}

.flashcard__inner.flipped:hover {
  transform: translateY(-3px);
}

@media (max-width: 768px) {
  .flashcard__inner.flipped:hover {
    transform: translateY(-2px);
  }
}

.flashcard__front,
.flashcard__back {
  position: absolute;
  width: 100%;
  height: 100%;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-8);
  text-align: center;
  border-radius: var(--radius-xl);
  top: 0;
  left: 0;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

/* Default state - show front */
.flashcard__front {
  opacity: 1;
  visibility: visible;
}

.flashcard__back {
  opacity: 0;
  visibility: hidden;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-text-inverse);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Flipped state - show back */
.flashcard__inner.flipped .flashcard__front {
  opacity: 0;
  visibility: hidden;
}

.flashcard__inner.flipped .flashcard__back {
  opacity: 1;
  visibility: visible;
}

.french-word {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  line-height: 1.2;
  word-break: break-word;
  word-wrap: break-word;
  text-align: center;
}

.word-text {
  display: block;
  margin-bottom: var(--space-3);
  letter-spacing: 0.025em;
  word-break: break-word;
  word-wrap: break-word;
}

.english-word {
  font-size: var(--text-2xl);
  color: var(--color-text-inverse);
  font-weight: var(--font-medium);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  word-break: break-word;
  word-wrap: break-word;
  text-align: center;
}

/* Mobile typography optimizations */
@media (max-width: 768px) {
  .flashcard__front,
  .flashcard__back {
    min-height: 160px;
    gap: var(--space-3);
    padding: var(--space-6);
  }
  
  .french-word {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-2);
  }
  
  .english-word {
    font-size: var(--text-xl);
  }
}

@media (max-width: 480px) {
  .flashcard__front,
  .flashcard__back {
    padding: var(--space-4);
    gap: var(--space-2);
  }
  
  .french-word {
    font-size: var(--text-2xl);
  }
  
  .english-word {
    font-size: var(--text-lg);
  }
}

/* IMPROVED - Better positioned controls with improved UX */
.flashcard-controls {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  align-items: center;
  margin-top: var(--space-4);
  padding: var(--space-3);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
}

/* Enhanced mobile responsiveness for flashcard controls */
@media (max-width: 768px) {
  .flashcard-controls {
    margin-top: var(--space-3);
    padding: var(--space-1);
  }
}

@media (max-width: 480px) {
  .flashcard-controls {
    margin-top: var(--space-2);
  }
}

/* IMPROVED - Enhanced button styling */
.btn--audio {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
  border-radius: var(--radius-full);
  padding: var(--space-4);
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  position: relative;
  overflow: hidden;
}

.btn--audio:hover {
  background: var(--color-primary-dark);
  transform: scale(1.08);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

.btn--audio:active {
  transform: scale(0.95);
}

.btn--audio .material-icons {
  font-size: 24px;
  z-index: 1;
}

/* Mobile button optimizations */
@media (max-width: 768px) {
  .btn--audio {
    width: 48px;
    height: 48px;
    padding: var(--space-3);
  }
  
  .btn--audio .material-icons {
    font-size: 20px;
  }
  
  .btn--audio:hover {
    transform: scale(1.05);
  }
}

@media (max-width: 480px) {
  .btn--audio {
    width: 44px;
    height: 44px;
  }
  
  .btn--audio .material-icons {
    font-size: 18px;
  }
}

/* Pulse animation for audio feedback */
.btn--audio.animate-pulse::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-full);
  animation: pulse-audio 1.5s ease-out;
}

@keyframes pulse-audio {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  100% {
    transform: scale(1.4);
    opacity: 0;
  }
}

/* IMPROVED - Cleaner phonetic styling */
.phonetic-text {
  font-size: var(--text-base);
  color: var(--color-text-tertiary);
  font-style: italic;
  font-weight: var(--font-medium);
  margin-top: var(--space-2);
  opacity: 0.85;
  background: rgba(0, 0, 0, 0.04);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
}

.card-hint {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-top: var(--space-3);
  opacity: 0.8;
  font-style: italic;
  font-weight: var(--font-normal);
}

.flashcard__back .card-hint {
  color: rgba(255, 255, 255, 0.9);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* Mobile optimizations for text elements */
@media (max-width: 768px) {
  .phonetic-text {
    font-size: var(--text-sm);
    padding: var(--space-1) var(--space-2);
    margin-top: var(--space-1);
  }
  
  .card-hint {
    font-size: var(--text-xs);
    margin-top: var(--space-2);
  }
}

@media (max-width: 480px) {
  .phonetic-text {
    font-size: var(--text-xs);
  }
  
  .card-hint {
    margin-top: var(--space-1);
  }
}

/* IMPROVED - More elegant info box */
.activity-info.compact {
  background: linear-gradient(135deg, var(--color-bg-subtle), var(--color-bg-card));
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-6);
  margin-top: var(--space-6);
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.activity-info.compact .info-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
}

.activity-info.compact .material-icons {
  font-size: 20px;
  opacity: 0.9;
  color: var(--color-primary);
}

/* Enhanced MCQ Styling */
.mcq-activity {
  max-width: 600px;
  margin: 0 auto;
}

.activity-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin: 0;
  text-align: center;
}

.mcq-options {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.mcq-option {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  background: var(--color-bg-secondary);
  border: 2px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  text-align: left;
  transition: all var(--transition-normal);
  cursor: pointer;
  min-height: 60px;
}

.mcq-option:hover {
  border-color: var(--color-primary);
  background: var(--color-bg-accent);
  transform: translateX(8px);
}

.mcq-option.selected {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-lg);
}

.mcq-option.correct {
  border-color: var(--color-success);
  background: linear-gradient(135deg, var(--color-success), var(--color-success-light));
  color: var(--color-text-inverse);
}

.mcq-option.incorrect {
  border-color: var(--color-error);
  background: linear-gradient(135deg, var(--color-error), var(--color-error-light));
  color: var(--color-text-inverse);
}

/* Scenario activity styling */
.scenario.card {
  max-width: 760px;
  margin: 0 auto;
  overflow: hidden;
}

.scenario-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.scenario-subtitle {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
}

.scenario-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.scenario .info-block {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.scenario .info-block h4 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.scenario .info-block p {
  margin: 0;
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text-primary);
}

.scenario-phrases h4 {
  margin-bottom: var(--space-2);
}

.scenario-instructions {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.scenario-options {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.scenario-option {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg-secondary);
  border: 2px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  cursor: pointer;
}

.scenario-option:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.scenario-option.selected {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.16), rgba(37, 99, 235, 0.05));
  box-shadow: var(--shadow-lg);
}

.scenario-option.correct {
  border-color: var(--color-success);
  background: linear-gradient(135deg, var(--color-success), var(--color-success-light));
  color: var(--color-text-inverse);
}

.scenario-option.incorrect {
  border-color: var(--color-error);
  background: linear-gradient(135deg, var(--color-error), var(--color-error-light));
  color: var(--color-text-inverse);
}

.scenario-option.locked {
  cursor: default;
}

.scenario-option__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  text-align: left;
}

.scenario-option__prompt {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
}

.scenario-option__response {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: inherit;
}

.scenario-option__audio {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.scenario-option__audio .material-icons {
  font-size: 20px;
}

.scenario-option.selected .scenario-option__audio {
  background: rgba(37, 99, 235, 0.18);
  color: var(--color-primary);
}

.scenario-option.correct .scenario-option__audio,
.scenario-option.incorrect .scenario-option__audio {
  background: rgba(255, 255, 255, 0.25);
  color: var(--color-text-inverse);
}

.scenario-option.correct .scenario-option__prompt,
.scenario-option.incorrect .scenario-option__prompt {
  color: rgba(255, 255, 255, 0.85);
}

@media (max-width: 600px) {
  .scenario.card {
    max-width: 100%;
  }

  .scenario-option {
    padding: var(--space-4);
  }

  .scenario-option__response {
    font-size: var(--text-base);
  }
}

.option-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  font-weight: var(--font-bold);
  font-size: var(--text-sm);
  flex-shrink: 0;
}

.mcq-option.selected .option-letter {
  background: rgba(255, 255, 255, 0.2);
}

.option-text {
  font-size: var(--text-base);
  font-weight: var(--font-medium);
}

/* Progress Indicators */
.progress-indicator {
  margin-top: var(--space-4);
}

.progress-text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  text-align: center;
}

.progress-bar {
  height: 8px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}

/* Activity Info Enhancement */
.activity-info {
  margin-top: var(--space-6);
}

.info-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: linear-gradient(135deg, var(--color-info-bg), var(--color-bg-accent));
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-info);
}

.info-item .material-icons {
  color: var(--color-info);
  font-size: 24px;
}

/* Audio Button Enhancements */
.audio-btn.playing {
  background: linear-gradient(135deg, var(--color-success), var(--color-success-light));
  color: var(--color-text-inverse);
}
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.activity-state.pending {
  background: var(--color-neutral-subtle);
  color: var(--color-text-secondary);
}

.activity-state.in-progress {
  background: var(--color-accent-subtle);
  color: var(--color-accent-emphasis);
}

.activity-state.completed {
  background: var(--color-success-subtle);
  color: var(--color-success-emphasis);
}

/* Hint System */
.hint-container {
  margin-top: var(--space-4);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.hint-button {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-secondary);
  border: none;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.hint-button:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.hint-button.active {
  background: var(--color-accent-subtle);
  color: var(--color-accent-emphasis);
}

.hint-text {
  padding: var(--space-4);
  background: var(--color-bg-primary);
  border-top: 1px solid var(--color-border-default);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  animation: expandDown 0.3s ease-out;
}

/* Enhanced Activity Components */
.flashcards-activity {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
  position: relative;
  /* overflow: hidden; -- Removed to fix 3D transform context for flashcard flip animations */
}

.flashcards-activity::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0.8;
}

.flashcards-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

/* Enhanced MCQ Styles - Simplified Layout */
.mcq-activity {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
}

.mcq-question {
  font-size: var(--text-xl);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
  text-align: center;
  line-height: var(--leading-relaxed);
}

.mcq-options {
  display: grid;
  gap: var(--space-3);
  max-width: 600px;
  margin: 0 auto;
}

.mcq-activity .mcq-option {
  background: var(--color-bg-secondary) !important;
  border: 2px solid var(--color-border-default) !important;
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-6);
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-text-primary) !important;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.mcq-option::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left var(--transition-normal);
}

.mcq-activity .mcq-option:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary) !important;
  background: var(--color-bg-tertiary) !important;
}

.mcq-activity .mcq-option:hover::before {
  left: 100%;
}

.mcq-activity .mcq-option.selected {
  border-color: var(--color-primary) !important;
  background: var(--color-bg-accent) !important;
  color: var(--color-primary) !important;
  transform: scale(1.02);
}

.mcq-option.correct {
  background: linear-gradient(135deg, var(--color-success-bg), var(--color-success));
  border-color: var(--color-success);
  color: var(--color-text-inverse);
  animation: correctPulse 0.6s ease-out;
}

.mcq-option.incorrect {
  background: linear-gradient(135deg, var(--color-error-bg), var(--color-error));
  border-color: var(--color-error);
  color: var(--color-text-inverse);
  animation: incorrectShake 0.5s ease-out;
}

.mcq-option .result-icon {
  margin-left: var(--space-2);
  font-size: 20px;
  animation: iconPop 0.3s ease-out;
}

.option-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  font-weight: var(--font-bold);
  font-size: var(--text-sm);
  flex-shrink: 0;
}

.option-text {
  flex: 1;
  color: var(--color-text-primary);
}

/* Enhanced Audio Button with Responsive Design */
.audio-btn {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  min-height: 48px;
  min-width: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  white-space: nowrap;
}

/* Mobile-first responsive design for audio buttons */
@media (max-width: 768px) {
  .audio-btn {
    min-height: 52px;
    min-width: 140px;
    padding: var(--space-4) var(--space-5);
    font-size: var(--text-base);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 280px;
    margin: 0 auto;
  }
}

@media (max-width: 480px) {
  .audio-btn {
    min-height: 56px;
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-lg);
    letter-spacing: 0.02em;
  }
}

.audio-btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transition: all var(--transition-normal);
  transform: translate(-50%, -50%);
}

.audio-btn:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
}

.audio-btn:hover::before {
  width: 100px;
  height: 100px;
}

.audio-btn:active {
  transform: scale(0.95);
}

.audio-btn.playing {
  background: var(--color-success);
  animation: audioPlaying 1s ease-in-out infinite alternate;
}

.audio-btn .material-icons {
  font-size: 24px;
  z-index: 1;
}

/* Activity Completion States */
.activity-completed {
  border-color: var(--color-success);
  background: linear-gradient(135deg, var(--color-bg-card), var(--color-success-bg));
  position: relative;
}

.activity-completed::after {
  content: '✓';
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  width: 32px;
  height: 32px;
  background: var(--color-success);
  color: var(--color-text-inverse);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 18px;
  animation: completionBadge 0.5s ease-out;
}

/* Progress Indicators */
.activity-progress {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
}

.progress-bar-container {
  flex: 1;
  margin: 0 var(--space-4);
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
  position: relative;
}

.progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: progressShimmer 2s ease-in-out infinite;
}

.progress-text {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  min-width: 60px;
  text-align: center;
}

/* Enhanced Animation Keyframes */
@keyframes correctPulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

@keyframes incorrectShake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-3px); }
  20%, 40%, 60%, 80% { transform: translateX(3px); }
}

@keyframes iconPop {
  0% { transform: scale(0); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

@keyframes audioPlaying {
  0% { box-shadow: var(--shadow-md), 0 0 0 0 rgba(16, 185, 129, 0.4); }
  100% { box-shadow: var(--shadow-lg), 0 0 0 20px rgba(16, 185, 129, 0); }
}

@keyframes completionBadge {
  0% { transform: scale(0) rotate(0deg); opacity: 0; }
  50% { transform: scale(1.2) rotate(180deg); opacity: 0.8; }
  100% { transform: scale(1) rotate(360deg); opacity: 1; }
}

@keyframes progressShimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

@keyframes cardFlip {
  0% { transform: rotateY(0); }
  50% { transform: rotateY(-90deg); }
  100% { transform: rotateY(0); }
}

/* Match Activity Enhancements */
.match-activity {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
}

.match-items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  max-width: 800px;
  margin: 0 auto;
}

.match-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.match-item {
  background: var(--color-bg-card);
  border: 2px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  user-select: none;
}

.match-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.match-item.selected {
  border-color: var(--color-accent);
  background: var(--color-bg-accent);
  transform: scale(1.02);
}

.match-item.matched {
  border-color: var(--color-success);
  background: var(--color-success-bg);
  color: var(--color-success);
  cursor: default;
  animation: matchSuccess 0.6s ease-out;
}

.match-item.wrong-match {
  animation: matchError 0.5s ease-out;
}

@keyframes matchSuccess {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

@keyframes matchError {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

/* Count Activity Styles */
.count-activity {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
}

.count-prompt {
  text-align: center;
  margin-bottom: var(--space-4);
}

.count-prompt h4 {
  color: var(--color-text-primary);
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  margin: 0;
}

.count-image-container {
  text-align: center;
  margin: var(--space-6) 0;
  display: flex;
  justify-content: center;
}

.count-image {
  width: min(100%, 420px);
  height: auto;
  max-height: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  object-fit: contain;
}

@media (min-width: 768px) {
  .count-image {
    width: min(100%, 560px);
  }
}

.count-input-section {
  text-align: center;
  margin-top: var(--space-6);
}

.count-label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.count-input-container {
  display: flex;
  justify-content: center;
}

.count-input {
  background: var(--color-bg-card);
  border: 2px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-xl);
  font-weight: var(--font-medium);
  text-align: center;
  width: 120px;
  transition: all var(--transition-normal);
}

.count-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.1);
  outline: none;
}

.count-input.has-value {
  border-color: var(--color-success);
  background: var(--color-success-bg);
}

/* Fill Activity Styles */
.fill-container {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
}

.fill-prompt {
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  text-align: center;
  margin-bottom: var(--space-4);
}

.fill-image-container {
  text-align: center;
  margin: var(--space-6) 0;
  display: flex;
  justify-content: center;
}

.fill-image {
  width: min(100%, 420px);
  height: auto;
  max-height: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  object-fit: contain;
}

@media (min-width: 768px) {
  .fill-image {
    width: min(100%, 560px);
  }
}

.fill-sentence {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin: var(--space-4) 0;
}

.sentence-text {
  font-size: var(--text-base);
  color: var(--color-text-primary);
  margin: 0;
  text-align: center;
}

.fill-input-container {
  text-align: center;
  margin-top: var(--space-6);
}

.fill-input {
  background: var(--color-bg-card);
  border: 2px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  text-align: center;
  min-width: 200px;
  transition: all var(--transition-normal);
}

.fill-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.1);
  outline: none;
}

/* Shared Activity Input Styling */
.activity :where(input[type="text"], textarea, select) {
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast),
    color var(--transition-fast);
}

.activity :where(select) {
  padding-right: var(--space-6);
  min-width: 160px;
}

.activity :where(textarea) {
  min-height: 140px;
  resize: vertical;
}

.activity :where(input[type="text"], textarea)::placeholder {
  color: var(--color-text-tertiary);
  font-style: italic;
}

.activity :where(input[type="text"], textarea, select):focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.15);
  background: var(--color-bg-interactive);
  outline: none;
}

.activity :where(input[type="text"], textarea, select):disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.activity :where(.dialogue-input,
    .grammar-input,
    .blank-input,
    .usage-input,
    .context-reflection,
    .cultural-reflection,
    .comparison-french,
    .comparison-own) {
  width: 100%;
}

.comparison-input {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.comparison-input .comparison-side {
  flex: 1 1 260px;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.comparison-input label {
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
}

.fill-input::placeholder {
  color: var(--color-text-tertiary);
  font-style: italic;
}

/* Build Activity Styles */
.build-activity {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
}

.build-target {
  text-align: center;
  margin-bottom: var(--space-6);
}

.build-target h4 {
  color: var(--color-text-primary);
  font-size: var(--text-xl);
  font-weight: var(--font-medium);
  margin: 0;
}

.build-letters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  margin: var(--space-6) 0;
}

.build-letter {
  background: var(--color-bg-card);
  border: 2px solid var(--color-border-default);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  min-width: 48px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  user-select: none;
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
}

.build-letter:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.build-letter.selected {
  border-color: var(--color-accent);
  background: var(--color-bg-accent);
  transform: scale(0.95);
}

.build-word-display {
  text-align: center;
  margin: var(--space-6) 0;
  padding: var(--space-4);
  background: var(--color-bg-card);
  border: 2px dashed var(--color-border-default);
  border-radius: var(--radius-lg);
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
}

/* Speak Activity Styles */
.speak-activity {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
  text-align: center;
}

.speak-phrase {
  font-size: var(--text-2xl);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  margin: var(--space-6) 0;
  padding: var(--space-4);
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
}

.speak-controls {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.speak-btn {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.speak-btn:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.speak-instructions {
  text-align: center;
  margin-bottom: var(--space-6);
  padding: var(--space-4);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
}

.speak-goal {
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.speak-hint {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  font-style: italic;
}

.speak-tip {
  margin-top: var(--space-6);
  padding: var(--space-4);
  background: var(--color-accent-subtle);
  border: 1px solid var(--color-accent-emphasis);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
}

.speak-tip .material-icons {
  color: var(--color-accent-emphasis);
}

.speak-phrase-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.speak-translation {
  margin: 0;
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  font-style: italic;
}

.speak-target-phonemes {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.speak-target-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary, #9ca3af);
}

.speak-phoneme-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
}

.phoneme-chip {
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-subtle);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
}

.speak-record-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.speak-record-btn.is-recording {
  background: #dc2626;
  color: #ffffff;
  transform: scale(0.98);
}

.speak-recorder {
  margin-top: var(--space-5);
  padding: var(--space-4);
  border: 1px dashed var(--color-border-subtle);
  border-radius: var(--radius-md);
  background: var(--color-bg-secondary);
  text-align: left;
}

.speak-record-status {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.speak-recording-player {
  width: 100%;
  margin-top: var(--space-2);
}

.speak-feedback {
  margin-top: var(--space-5);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background: var(--color-bg-card);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  text-align: left;
}

.speak-score-badge {
  align-self: flex-start;
  border-radius: var(--radius-full);
  padding: 0.35rem 0.9rem;
  font-weight: var(--font-semibold);
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

.speak-score-badge.is-strong {
  background: rgba(16, 185, 129, 0.18);
  color: var(--color-success, #047857);
}

.speak-score-badge.is-developing {
  background: rgba(251, 191, 36, 0.2);
  color: var(--color-warning, #b45309);
}

.speak-score-badge.is-attention {
  background: rgba(248, 113, 113, 0.25);
  color: var(--color-error, #b91c1c);
}

.speak-feedback-summary {
  margin: 0;
  font-size: var(--text-base);
  color: var(--color-text-primary);
}

.speak-transcript {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.speak-phoneme-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.speak-phoneme-item {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background: var(--color-bg-secondary);
}

.speak-phoneme-item--excellent {
  border-color: rgba(16, 185, 129, 0.45);
  background: rgba(16, 185, 129, 0.12);
}

.speak-phoneme-item--strong {
  border-color: rgba(59, 130, 246, 0.4);
  background: rgba(59, 130, 246, 0.1);
}

.speak-phoneme-item--developing {
  border-color: rgba(251, 191, 36, 0.45);
  background: rgba(251, 191, 36, 0.16);
}

.speak-phoneme-item--attention {
  border-color: rgba(248, 113, 113, 0.55);
  background: rgba(248, 113, 113, 0.2);
}

.speak-phoneme-word {
  display: flex;
  justify-content: space-between;
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-2);
  color: var(--color-text-primary);
}

.speak-phoneme-hint {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.speak-support-note {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-align: left;
}

.speak-support-note--warning {
  color: var(--color-warning, #b45309);
}

.speak-model-sentence {
  margin-top: var(--space-4);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-bg-secondary);
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  text-align: left;
}

.speak-model-sentence .material-icons {
  color: var(--color-primary);
}

.essay-model {
  margin-top: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-bg-secondary);
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  color: var(--color-text-primary);
}

.essay-model .material-icons {
  color: var(--color-primary);
}

.essay-rubric {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--space-4);
  font-size: var(--text-sm);
}

.essay-rubric th,
.essay-rubric td {
  padding: var(--space-3);
  border: 1px solid var(--color-border-subtle);
  text-align: left;
  vertical-align: top;
}

.essay-rubric th {
  background: var(--color-bg-secondary);
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
}

.essay-rubric__row--excellent {
  background: rgba(16, 185, 129, 0.12);
}

.essay-rubric__row--strong {
  background: rgba(59, 130, 246, 0.08);
}

.essay-rubric__row--developing {
  background: rgba(251, 191, 36, 0.1);
}

.essay-rubric__row--emerging {
  background: rgba(248, 113, 113, 0.12);
}

.essay-connectors {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.essay-connectors strong {
  color: var(--color-text-primary);
}

/* Responsive Enhancements */
@media (max-width: 768px) {
  .flashcard {
    min-height: 150px;
    padding: var(--space-4);
  }
  
  .flashcard__front,
  .flashcard__back {
    min-height: 200px;
    padding: var(--space-lg);
  }
  
  .flashcard__text {
    font-size: var(--text-xl);
  }
  
  .flashcard-controls {
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-3);
    align-items: stretch;
  }
  
  .flashcard-controls .btn {
    width: 100%;
    max-width: 280px;
    margin: 0 auto;
    min-height: 52px;
    font-size: var(--text-base);
  }
  
  .mcq-options {
    grid-template-columns: 1fr;
  }
  
  .match-items {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  
  .activity-progress {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
  }
  
  .progress-bar-container {
    margin: 0;
  }
  
  /* Responsive styles for new activity types */
  .count-input {
    font-size: var(--text-lg);
    min-width: 100px;
    width: 100px;
  }
  
  .fill-input {
    font-size: var(--text-base);
    min-width: auto;
    width: 100%;
    max-width: 300px;
  }
  
  .build-letters {
    gap: var(--space-1);
  }
  
  .build-letter {
    min-width: 40px;
    padding: var(--space-2);
    font-size: var(--text-base);
  }
  
  .speak-phrase {
    font-size: var(--text-xl);
    padding: var(--space-3);
  }
  
  .speak-controls {
    flex-direction: column;
    align-items: center;
  }
  
  .speak-instructions {
    padding: var(--space-3);
    margin-bottom: var(--space-4);
  }
  
  .speak-goal {
    font-size: var(--text-base);
  }
  
  .speak-tip {
    margin-top: var(--space-4);
    padding: var(--space-3);
    font-size: var(--text-xs);
  }
}

@media (max-width: 480px) {
  .flashcard {
    min-height: 140px;
    padding: var(--space-3);
  }
  
  .flashcard__front,
  .flashcard__back {
    min-height: 180px;
    padding: var(--space-md);
  }
  
  .flashcard__text {
    font-size: var(--text-lg);
  }
  
  .flashcard-controls .btn {
    min-height: 56px;
    font-size: var(--text-lg);
    padding: var(--space-4) var(--space-6);
    letter-spacing: 0.02em;
  }
  
  .activity__progress-bar {
    width: 120px;
  }
  
  /* Responsive styles for new activity types - small mobile */
  .count-input {
    font-size: var(--text-base);
    width: 80px;
  }
  
  .fill-input {
    font-size: var(--text-sm);
    padding: var(--space-3) var(--space-4);
  }
  
  .build-letter {
    min-width: 36px;
    font-size: var(--text-sm);
  }
  
  .speak-phrase {
    font-size: var(--text-lg);
  }
  
  .speak-goal {
    font-size: var(--text-sm);
    flex-direction: column;
    gap: var(--space-1);
  }
  
  .speak-hint {
    font-size: var(--text-sm);
  }
  
  .speak-tip {
    flex-direction: column;
    text-align: center;
    gap: var(--space-1);
  }
}

/* Removed conflicting flashcard styles that prevented proper 3D flip functionality */

.phonetic-helper {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  background: var(--color-bg-tertiary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  font-style: italic;
}

.phonetic-helper .material-icons {
  font-size: 14px;
}

.audio-btn.playing {
  background: var(--color-success-emphasis);
  color: white;
  transform: scale(1.05);
}

.activity-info {
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: var(--color-accent-subtle);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-accent-emphasis);
}

.info-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.info-item .material-icons {
  color: var(--color-accent-emphasis);
  font-size: 18px;
}

/* MCQ Enhanced Styles */
.mcq-option {
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.mcq-option.correct {
  background: var(--color-success-subtle);
  border-color: var(--color-success-emphasis);
  color: var(--color-success-emphasis);
}

.mcq-option.incorrect {
  background: var(--color-danger-subtle);
  border-color: var(--color-danger-emphasis);
  color: var(--color-danger-emphasis);
}

.mcq-option .material-icons {
  margin-left: var(--space-1);
  font-size: 16px;
}

/* Animations */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes expandDown {
  from {
    max-height: 0;
    opacity: 0;
  }
  to {
    max-height: 200px;
    opacity: 1;
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

.activity-state.in-progress {
  animation: pulse 2s infinite;
}
.activity-header {
  max-width: 1000px;
  margin: 0 auto var(--space-8);
  padding: 0 var(--space-4);
}

.activity-header__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

.activity-header__breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  background: rgba(255, 255, 255, 0.05);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.activity-header__breadcrumb .material-icons {
  font-size: 16px;
  color: var(--color-text-secondary);
}

.activity-header__breadcrumb a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
  font-weight: var(--font-medium);
}

.activity-header__breadcrumb a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.activity-header__title {
  font-size: var(--text-4xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
  line-height: var(--leading-tight);
}

.activity-header__description {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  line-height: var(--leading-relaxed);
}

.activity-intent {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  background: rgba(148, 163, 184, 0.12);
  border: 1px solid var(--color-border-muted);
  border-left: 3px solid var(--color-success);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-6);
}

.activity-intent__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: rgba(34, 197, 94, 0.16);
  color: var(--color-success-light);
  flex-shrink: 0;
  border: 1px solid rgba(34, 197, 94, 0.35);
}

.activity-intent__icon .material-icons {
  font-size: 26px;
}

.activity-intent__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.activity-intent__title {
  margin: 0;
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  text-transform: none;
  letter-spacing: normal;
}

.activity-intent__subtitle {
  margin: 0;
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.activity-intent__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

@media (max-width: 640px) {
  .activity-header__top {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .activity-header__breadcrumb {
    width: 100%;
    justify-content: flex-start;
  }
}

@media (max-width: 768px) {
  .activity-intent {
    flex-direction: column;
    align-items: stretch;
  }

  .activity-intent__icon {
    width: 40px;
    height: 40px;
  }
}

.activity-header__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-5);
}

.activity-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  background: rgba(37, 99, 235, 0.12);
  color: var(--color-text-primary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

.activity-chip .material-icons {
  font-size: 18px;
}

.activity-chip--subtle {
  background: rgba(148, 163, 184, 0.14);
  color: var(--color-text-secondary);
}

/* Activity Progress */
.activity-progress {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-8);
}

.activity-progress__info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.activity-progress__text {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
}

.activity-progress__labels {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.activity-status-label {
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.activity-status-label--in-progress {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border: 1px solid var(--color-warning);
}

.activity-status-label--completed {
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.activity-progress__bar {
  width: 100%;
  height: 8px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

@media (max-width: 640px) {
  .activity-progress__info {
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
  }

  .activity-progress__labels {
    width: 100%;
    justify-content: flex-start;
  }
}

.activity-progress__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-text-link), var(--color-primary-light));
  transition: width var(--transition-normal);
  border-radius: inherit;
}

/* Activity Container */
.activity-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.activity-content {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  margin-bottom: var(--space-6);
  min-height: 400px;
  position: relative;
}

.activity-stage {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  padding-bottom: var(--space-xl);
}

.activity-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: 300px;
  color: var(--color-text-secondary);
}

/* Loading Spinner */
.loading-spinner {
  margin-bottom: var(--space-4);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border-default);
  border-top-color: var(--color-text-link);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Activity Actions - GitHub Style */
.activity-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-8);
}

.activity-actions__left,
.activity-actions__right,
.activity-actions__center {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  min-width: 0;
}

.activity-actions__center {
  flex: 1 1 240px;
  justify-content: center;
}

.activity-actions .btn {
  max-width: 100%;
}

.activity-actions__center .btn {
  flex: 1 1 200px;
}

.activity-actions__left .btn,
.activity-actions__right .btn {
  flex: 0 0 auto;
}

/* Discussion Section - GitHub PR Style */
.activity-discussion {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Lesson page layout refresh */
.lesson-page {
  background: var(--color-bg-canvas);
  padding: clamp(1.5rem, 4vw, 3rem) 0 clamp(2.5rem, 6vw, 4rem);
  display: flex;
  flex-direction: column;
  gap: clamp(2rem, 5vw, 3rem);
}

.lesson-header,
.lesson-details,
.solo-coach,
.lesson-progress,
.lesson-activity {
  padding-inline: clamp(1rem, 6vw, 2rem);
}

.lesson-header > *,
.lesson-details > *,
.solo-coach > *,
.lesson-progress > *,
.lesson-activity > * {
  width: min(100%, 960px);
  margin-inline: auto;
}

.lesson-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  padding-block: 0 clamp(0.5rem, 2vw, 1rem);
}

.lesson-header__breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.lesson-header__breadcrumb a {
  color: inherit;
}

.lesson-header__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.lesson-header__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
}

.lesson-header__subtitle {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  max-width: 48rem;
}

.lesson-intent-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-md) var(--space-lg);
}

.lesson-intent-card__copy {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.lesson-intent-card__title {
  font-weight: 600;
  font-size: var(--text-base);
}

.lesson-intent-card__subtitle {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.lesson-header__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.lesson-meta__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  min-width: 160px;
}

.lesson-meta__label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.lesson-meta__value {
  font-size: var(--text-lg);
  font-weight: 600;
}

.lesson-header__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.lesson-details {
  display: flex;
  flex-direction: column;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  padding-block: 0 clamp(0.5rem, 2vw, 1rem);
}

.lesson-details__intro {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.lesson-details__grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.lesson-details__card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.lesson-details__label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.lesson-details__value {
  font-size: var(--text-lg);
  font-weight: 600;
}

.lesson-details__meta {
  font-size: var(--text-sm);
  color: var(--color-text-subtle);
}

.lesson-details__plan,
.lesson-details__reflection {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.solo-coach {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.solo-coach__header {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.solo-coach__content {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.solo-coach__card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.solo-coach__card-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.solo-coach__steps {
  display: grid;
  gap: var(--space-xs);
  padding-left: 1.25rem;
}

.solo-coach__celebration {
  margin-top: var(--space-sm);
  color: var(--color-text-muted);
}

.lesson-progress {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.lesson-progress__info {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
  justify-content: space-between;
}

.lesson-progress__bar {
  height: 10px;
  width: 100%;
  background: rgba(148, 163, 184, 0.25);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.lesson-progress__fill {
  height: 100%;
  background: var(--color-accent-primary);
  border-radius: inherit;
  width: 0;
  transition: width 0.3s ease;
}

.lesson-activity > * {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-card);
  padding: clamp(1.5rem, 5vw, 2.5rem);
  display: flex;
  flex-direction: column;
  gap: clamp(1.5rem, 5vw, 2.5rem);
}

.lesson-activity .activity-container.dark-activity {
  margin: 0;
  padding: 0;
  border-radius: var(--radius-xl);
  box-shadow: none;
}

.lesson-activity .activity-content {
  padding: clamp(1.25rem, 4vw, 1.75rem);
}

.lesson-activity .activity-actions {
  background: transparent;
  border: none;
  padding: 0;
  margin: 0;
  box-shadow: none;
}

@media (max-width: 720px) {
  .lesson-page {
    padding: clamp(1rem, 5vw, 1.5rem) 0 clamp(2rem, 7vw, 3rem);
    gap: var(--space-2xl);
  }

  .lesson-header,
  .lesson-details,
  .solo-coach,
  .lesson-progress,
  .lesson-activity {
    padding-inline: var(--space-4);
  }

  .lesson-intent-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .lesson-activity > * {
    border-radius: var(--radius-xl);
    padding: clamp(1.25rem, 6vw, 1.75rem);
  }

  .lesson-activity .activity-content {
    padding: clamp(1rem, 6vw, 1.5rem);
  }
}

.discussion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border-default);
}

.discussion-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

.discussion-count {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  background: var(--color-bg-tertiary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
}

.discussion-content {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.discussion-placeholder {
  text-align: center;
  color: var(--color-text-secondary);
  padding: var(--space-8);
}

.discussion-placeholder .material-icons {
  font-size: 48px;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
}

.discussion-placeholder p {
  margin-bottom: var(--space-4);
  line-height: var(--leading-relaxed);
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: transparent;
  position: relative;
}

.btn:focus-visible {
  outline: 2px solid var(--color-text-link);
  outline-offset: 2px;
  box-shadow: var(--shadow-focus);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--color-text-link);
  color: #ffffff;
  border-color: var(--color-text-link);
}

.btn--primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--secondary {
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  border-color: var(--color-border-default);
}

.btn--secondary:hover:not(:disabled) {
  background: var(--color-bg-subtle);
  border-color: var(--color-border-muted);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn--success {
  background: var(--color-success);
  color: #ffffff;
  border-color: var(--color-success);
}

.btn--success:hover:not(:disabled) {
  filter: brightness(1.1);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: var(--color-text-link);
  border-color: var(--color-text-link);
}

.btn--outline:hover {
  background: var(--color-text-link);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* GitHub-style animations */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.activity-content {
  animation: slideIn 0.3s ease-out;
}

.activity-actions {
  animation: slideIn 0.4s ease-out;
}

.activity-discussion {
  animation: slideIn 0.5s ease-out;
}

/* Responsive Design */
@media (max-width: 768px) {
  .activity-header {
    padding: 0 var(--space-3);
  }

  .activity-header__title {
    font-size: var(--text-3xl);
  }

  .activity-header__meta {
    justify-content: center;
    gap: var(--space-xs);
  }

  .activity-chip {
    width: 100%;
    justify-content: center;
  }

  .activity-container,
  .activity-discussion {
    padding: 0 var(--space-3);
  }

  .activity-content {
    padding: var(--space-6);
  }

  .activity-actions {
    flex-direction: column;
    gap: var(--space-3);
    position: sticky;
    bottom: var(--space-3);
    background: rgba(15, 23, 42, 0.92);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(8px);
  }

  .activity-actions__left,
  .activity-actions__right,
  .activity-actions__center {
    width: 100%;
    justify-content: center;
  }

  .activity-actions__center .btn,
  .activity-actions__left .btn,
  .activity-actions__right .btn {
    width: 100%;
  }
  
  .activity-progress__info {
    flex-direction: column;
    gap: var(--space-2);
    align-items: center;
  }
}

@media (max-width: 480px) {
  .activity-header__breadcrumb {
    flex-wrap: wrap;
  }
  
  .activity-content {
    padding: var(--space-4);
  }
  
  .discussion-header {
    flex-direction: column;
    gap: var(--space-2);
    align-items: flex-start;
  }
}

.activity__content {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  margin-bottom: var(--space-xl);
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  text-align: center;
}

.activity__navigation {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
}

/* Duplicate flashcard styles removed to prevent conflicts with primary definitions */

/* Multiple Choice Activity */
.mcq__question {
  font-size: var(--text-xl);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-xl);
}

.mcq__options {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.mcq__option {
  display: flex;
  align-items: center;
  padding: var(--space-lg);
  background: var(--color-bg-card, var(--color-bg-secondary));
  border: 2px solid var(--color-border-light);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 60px;
}

.mcq__option:hover {
  border-color: var(--color-primary-light);
  background: var(--color-bg-tertiary);
}

.mcq__option.selected {
  border-color: var(--color-primary);
  background: var(--color-bg-accent);
}

.mcq__option.correct {
  border-color: var(--color-success);
  background: var(--color-success-bg, #dcfce7);
  color: var(--color-success);
}

.mcq__option.incorrect {
  border-color: var(--color-error);
  background: var(--color-error-bg, #fef2f2);
  color: var(--color-error);
}

/* Dark theme MCQ styles are handled via CSS custom properties */

.mcq__option-text {
  flex: 1;
  font-size: var(--text-base);
  font-weight: var(--font-medium);
}

.mcq__feedback {
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  text-align: center;
  margin-bottom: var(--space-lg);
}

.mcq__feedback.correct {
  background: var(--color-success-bg, #dcfce7);
  color: var(--color-success);
}

.mcq__feedback.incorrect {
  background: var(--color-error-bg, #fef2f2);
  color: var(--color-error);
}

/* Dark theme MCQ feedback styles are handled via CSS custom properties */

/* Fill in the blank Activity */
.fill__sentence {
  font-size: var(--text-xl);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-xl);
  text-align: center;
}

.fill__input {
  display: inline-block;
  min-width: 120px;
  padding: var(--space-sm) var(--space-md);
  border: 2px solid var(--color-border-medium);
  border-radius: var(--radius-md);
  font-size: var(--text-lg);
  text-align: center;
  transition: border-color var(--transition-fast);
  margin: 0 var(--space-xs);
}

.fill__input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.fill__input.correct {
  border-color: var(--color-success);
  background: var(--color-success-bg, #dcfce7);
}

.fill__input.incorrect {
  border-color: var(--color-error);
  background: var(--color-error-bg, #fef2f2);
}

/* Dark theme fill input styles are handled via CSS custom properties */

/* Loading States */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl);
  flex-direction: column;
  gap: var(--space-lg);
}

.loading__spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-border-light);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loading__text {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  text-align: center;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Success/Error States */
.activity__feedback {
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  text-align: center;
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  margin: var(--space-lg) 0;
}

.activity__feedback--success {
  background: var(--color-success-bg, #dcfce7);
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.activity__feedback--error {
  background: var(--color-error-bg, #fef2f2);
  color: var(--color-error);
  border: 1px solid var(--color-error);
}

/* Dark theme activity feedback styles are handled via CSS custom properties */

/* Responsive Activities */
@media (max-width: 768px) {
  .activity {
    padding: var(--space-lg) var(--space-md);
  }
  
  .activity__header {
    padding: var(--space-lg);
  }
  
  .activity__title {
    font-size: var(--text-2xl);
  }
  
  .activity__content {
    padding: var(--space-xl);
    min-height: 300px;
  }
  
  .activity__navigation {
    flex-direction: column;
    gap: var(--space-md);
  }
  
  .activity__progress-bar {
    width: 150px;
  }
  
  .flashcard {
    max-width: 100%;
  }
  
  .flashcard__front,
  .flashcard__back {
    min-height: 200px;
    padding: var(--space-lg);
  }
  
  .flashcard__text {
    font-size: var(--text-xl);
  }
  
  .mcq__question {
    font-size: var(--text-lg);
  }
  
  .mcq__option {
    padding: var(--space-md);
    min-height: 50px;
  }
  
  .fill__sentence {
    font-size: var(--text-lg);
  }
  
  .fill__input {
    min-width: 100px;
    font-size: var(--text-base);
  }
}

@media (max-width: 480px) {
  .activity__progress {
    flex-direction: column;
    gap: var(--space-sm);
  }
  
  .activity__progress-bar {
    width: 120px;
  }
  
  .flashcard__front,
  .flashcard__back {
    min-height: 180px;
    padding: var(--space-md);
  }
  
  .flashcard__text {
    font-size: var(--text-lg);
  }
}

/* Tablet-specific optimizations */
@media (min-width: 481px) and (max-width: 768px) {
  .flashcard-controls {
    flex-direction: row;
    gap: var(--space-4);
    justify-content: center;
  }
  
  .flashcard-controls .btn {
    flex: 1;
    max-width: 180px;
    min-height: 50px;
  }
}

/* Large mobile optimizations */
@media (min-width: 376px) and (max-width: 480px) {
  .flashcard-controls .btn {
    max-width: 320px;
  }
}

/* Legacy Activity Fallback Styles */
/* These styles provide fallback compatibility for any legacy activity implementations */

/* Legacy activity container styles */
.activity-flashcards, 
.activity-mcq, 
.activity-placeholder {
  background: var(--color-bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  margin: var(--space-4) 0;
  box-shadow: var(--shadow-md);
}

/* Legacy flashcard word/translation styles - use theme colors instead of hardcoded */
.flashcard-word {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.flashcard-translation {
  font-size: var(--text-xl);
  color: var(--color-success);
  margin-bottom: var(--space-4);
}

/* Legacy MCQ feedback styles - use theme colors */
.mcq-feedback .success {
  color: var(--color-success);
  font-weight: var(--font-bold);
  padding: var(--space-4);
  background: var(--color-success-bg);
  border-radius: var(--radius-md);
  margin: var(--space-4) 0;
}

.mcq-feedback .error {
  color: var(--color-error);
  font-weight: var(--font-bold);
  padding: var(--space-4);
  background: var(--color-error-bg);
  border-radius: var(--radius-md);
  margin: var(--space-4) 0;
}

/* Legacy activity actions */
.activity-actions {
  margin-top: var(--space-8);
  text-align: center;
}

/* Legacy lesson error styles */
.lesson-error {
  background: var(--color-error-bg);
  border: 2px solid var(--color-border-error);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
  color: var(--color-error);
}

.error-actions {
  margin-top: var(--space-6);
}

/* Simplified Activity Info */
.activity-info {
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-top: var(--space-4);
  border: 1px solid var(--color-border-subtle);
}

.info-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.info-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.progress-text {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  text-align: center;
}

/* Activity Error Styling */
.activity-error-icon {
  font-size: 48px;
  color: #ff9800;
}

/* Build Activity Success Message */
.build-success-message {
  text-align: center;
  margin-top: 1rem;
  padding: 1rem;
  background: var(--color-success);
  color: white;
  border-radius: var(--radius-lg);
  animation: slideIn 0.5s ease-out;
}

.build-success-emoji {
  font-size: 2rem;
}

.build-success-text {
  font-size: 1.2rem;
  font-weight: 600;
}
/* Onboarding Components */
.onboarding {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.onboarding.active {
  opacity: 1;
  visibility: visible;
}

.onboarding__content {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border-light);
  animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
  from {
    transform: translateY(30px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.onboarding__header {
  padding: var(--space-xl);
  text-align: center;
  border-bottom: 1px solid var(--color-border-light);
}

.onboarding__title {
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
}

.onboarding__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.onboarding__body {
  padding: var(--space-xl);
}

.onboarding__step {
  display: none;
}

.onboarding__step.active {
  display: block;
  animation: fadeIn 0.3s ease-out;
}

.onboarding__question {
  font-size: var(--text-xl);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-xl);
  text-align: center;
}

.onboarding__options {
  display: grid;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.onboarding__option {
  display: flex;
  align-items: center;
  padding: var(--space-lg);
  background: var(--color-bg-secondary);
  border: 2px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  color: inherit;
}

.onboarding__option:hover {
  border-color: var(--color-primary-light);
  background: var(--color-bg-tertiary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.onboarding__option.selected {
  border-color: var(--color-primary);
  background: var(--color-bg-accent);
}

.onboarding__option-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: var(--space-lg);
  flex-shrink: 0;
}

.onboarding__option-content {
  flex: 1;
}

.onboarding__option-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.onboarding__option-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

.onboarding__footer {
  padding: var(--space-xl);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.onboarding__progress {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.onboarding__progress-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border-medium);
  transition: background-color var(--transition-fast);
}

.onboarding__progress-dot.active {
  background: var(--color-primary);
}

.onboarding__actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* User Type Cards */
.user-type-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.user-type-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-2xl);
  background: var(--color-bg-secondary);
  border: 2px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  color: inherit;
  text-align: center;
}

.user-type-card:hover {
  border-color: var(--color-primary-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.user-type-card.selected {
  border-color: var(--color-primary);
  background: var(--color-bg-accent);
}

.user-type-card__icon {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-2xl);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  font-size: var(--text-3xl);
}

.user-type-card__title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
}

.user-type-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* Welcome Message */
.welcome-message {
  text-align: center;
  padding: var(--space-2xl);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-text-inverse);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-xl);
}

.welcome-message__title {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-md);
}

.welcome-message__text {
  font-size: var(--text-base);
  opacity: 0.9;
  line-height: var(--leading-relaxed);
}

/* Quick Start Cards */
.quick-start-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.quick-start-card {
  display: flex;
  align-items: center;
  padding: var(--space-lg);
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-fast);
}

.quick-start-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.quick-start-card__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: var(--space-md);
  flex-shrink: 0;
}

.quick-start-card__content {
  flex: 1;
}

.quick-start-card__title {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.quick-start-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* Skip Button */
.onboarding__skip {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: var(--text-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.onboarding__skip:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

/* Responsive Onboarding */
@media (max-width: 768px) {
  .onboarding__content {
    width: 95%;
    max-height: 95vh;
  }
  
  .onboarding__header,
  .onboarding__body,
  .onboarding__footer {
    padding: var(--space-lg);
  }
  
  .onboarding__title {
    font-size: var(--text-2xl);
  }
  
  .onboarding__question {
    font-size: var(--text-lg);
  }
  
  .user-type-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  
  .user-type-card {
    padding: var(--space-xl);
  }
  
  .user-type-card__icon {
    width: 60px;
    height: 60px;
    font-size: var(--text-2xl);
  }
  
  .onboarding__option {
    padding: var(--space-md);
  }
  
  .onboarding__option-icon {
    width: 40px;
    height: 40px;
    margin-right: var(--space-md);
  }
  
  .onboarding__footer {
    flex-direction: column;
    gap: var(--space-lg);
  }
  
  .welcome-message {
    padding: var(--space-xl);
  }
  
  .welcome-message__title {
    font-size: var(--text-xl);
  }
  
  .quick-start-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
}

@media (max-width: 480px) {
  .onboarding__content {
    width: 98%;
  }
  
  .onboarding__header,
  .onboarding__body,
  .onboarding__footer {
    padding: var(--space-md);
  }
  
  .user-type-card {
    padding: var(--space-lg);
  }
  
  .user-type-card__icon {
    width: 50px;
    height: 50px;
    font-size: var(--text-xl);
  }
}

/* Welcome Page Supporting UI */
/* Additional welcome page elements are defined in the dark theme section below */
/* User Type Description */
.user-type-description {
  margin-top: var(--space-xl);
  padding: var(--space-xl);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-xl);
  border-left: 4px solid var(--color-border-interactive);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.user-type-description.hidden {
  display: none;
}

.description-content {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  font-size: var(--text-base);
}

/* Completion Screen */
.completion-message {
  text-align: center;
  padding: var(--space-2xl) 0;
}

.success-icon {
  font-size: var(--text-5xl);
  margin-bottom: var(--space-xl);
  animation: bounce 1s ease-in-out infinite;
}

.success-icon .material-icons {
  background: linear-gradient(135deg, var(--color-success, #10b981) 0%, #059669 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.next-steps {
  margin: var(--space-2xl) 0;
  padding: var(--space-2xl);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-muted);
  box-shadow: var(--shadow-sm);
}

.next-steps h3 {
  color: var(--color-text-primary);
  margin-bottom: var(--space-xl);
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
}

.step-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
}

.step-card {
  padding: var(--space-lg);
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.step-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.action-buttons {
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-2xl);
}

.btn.large {
  padding: var(--space-md) var(--space-2xl);
  font-size: var(--text-lg);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  min-width: 200px;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.btn.large:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn.primary.large {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border: none;
  color: var(--color-text-inverse);
}

.btn.secondary.large {
  background: var(--color-bg-interactive);
  border: 1px solid var(--color-border-default);
  color: var(--color-text-primary);
}

/* Navigation */
.btn.invisible {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn.invisible:hover {
  transform: none;
}

/* Responsive Design */
@media (max-width: 768px) {
  .welcome-container {
    padding: var(--space-2xl);
    margin: var(--space-md);
    border-radius: var(--radius-xl);
  }

  .step-content h1 {
    font-size: var(--text-2xl);
  }

  .step-indicator {
    margin-bottom: var(--space-2xl);
    padding: var(--space-md) var(--space-lg);
    flex-direction: column;
    align-items: stretch;
  }

  .step {
    justify-content: center;
  }

  .step-number {
    width: 40px;
    height: 40px;
    font-size: var(--text-sm);
  }

  .action-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .btn.large {
    min-width: auto;
  }

  .welcome-navigation {
    flex-direction: column;
    gap: var(--space-lg);
  }
}
/* Personalization Banner - Non-intrusive onboarding invitation with improved contrast */
.personalization-banner {
  background: linear-gradient(135deg, var(--color-bg-accent) 0%, var(--color-bg-secondary) 100%);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  margin: var(--space-xl) auto;
  max-width: 900px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  /* Ensure proper contrast backdrop */
  backdrop-filter: blur(8px);
}

.personalization-banner:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.personalization-banner__container {
  padding: var(--space-lg);
  /* Improve text readability with background overlay */
  background: rgba(26, 31, 46, 0.1);
  border-radius: var(--radius-lg);
}

.personalization-banner__content {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.personalization-banner__icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  /* Improve icon contrast */
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.personalization-banner__text {
  flex: 1;
  min-width: 200px;
}

.personalization-banner__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-xs) 0;
  /* Improve title contrast */
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.personalization-banner__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
  line-height: var(--leading-relaxed);
  /* Improve description contrast */
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
}

.personalization-banner__actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-shrink: 0;
}

/* Mobile responsive */
@media (max-width: 768px) {
  .personalization-banner__content {
    flex-direction: column;
    text-align: center;
    gap: var(--space-md);
  }
  
  .personalization-banner__actions {
    justify-content: center;
    width: 100%;
  }
}

/* Hide banner animation */
.personalization-banner.hiding {
  opacity: 0;
  transform: translateY(-10px);
  pointer-events: none;
}

/* Subtle button style for dismiss */
.btn--subtle {
  opacity: 0.6;
  transition: opacity var(--transition-fast);
}

.btn--subtle:hover {
  opacity: 1;
}
/* Discussions Page - GitHub Style */

/* Discussion Header */
.discussion-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: var(--space-6) 0 var(--space-4);
  border-bottom: 1px solid var(--color-border-default);
  margin-bottom: var(--space-6);
}

.discussion-header__main {
  flex: 1;
  max-width: 75%;
}

.discussion-header__title {
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
  line-height: var(--leading-tight);
}

.discussion-header__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin: 0;
}

.discussion-header__actions {
  flex-shrink: 0;
}

/* Discussion Filters */
.discussion-filters {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border-default);
}

.discussion-filters__search {
  flex: 1;
  max-width: 320px;
}

.search-input {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  background: var(--color-bg-canvas);
  color: var(--color-text-primary);
  font-size: var(--text-sm);
  font-family: var(--font-family-sans);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-text-link);
  box-shadow: var(--shadow-focus);
}

.search-input::placeholder {
  color: var(--color-text-tertiary);
}

.discussion-filters__tabs {
  display: flex;
  gap: var(--space-1);
}

.filter-tab {
  padding: var(--space-2) var(--space-3);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.filter-tab:hover {
  background: var(--color-bg-subtle);
  color: var(--color-text-primary);
}

.filter-tab--active {
  background: var(--color-text-link);
  color: #ffffff;
  border-color: var(--color-text-link);
}

.filter-tab--active:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

/* Discussion List */
.discussion-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* Discussion Item */
.discussion-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  background: var(--color-bg-canvas);
  transition: all var(--transition-fast);
  position: relative;
}

.discussion-item:hover {
  border-color: var(--color-border-muted);
  box-shadow: var(--shadow-sm);
}

.discussion-item--featured {
  border-color: var(--color-text-link);
  background: linear-gradient(135deg, var(--color-bg-canvas) 0%, var(--color-bg-accent) 100%);
}

.discussion-item__avatar {
  flex-shrink: 0;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border-default);
}

.discussion-item__content {
  flex: 1;
  min-width: 0;
}

.discussion-item__meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.discussion-item__category {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.discussion-item__category--question {
  background: var(--color-info-bg);
  color: var(--color-info);
  border: 1px solid var(--color-border-default);
}

.discussion-item__category--tips {
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid var(--color-border-default);
}

.discussion-item__category--resources {
  background: #f3e8ff;
  color: #7c3aed;
  border: 1px solid var(--color-border-default);
}

.discussion-item__category--general {
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-default);
}

.discussion-item__category--announcement {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border: 1px solid var(--color-border-default);
}

/* Unified dark theme discussion category styles */
.discussion-item__category--resources {
  background: #581c87;
  color: #c4b5fd;
}

.discussion-item__pinned {
  color: var(--color-warning);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
}

.discussion-item__title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
}

.discussion-item__link {
  color: var(--color-text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.discussion-item__link:hover {
  color: var(--color-text-link);
  text-decoration: underline;
}

.discussion-item__excerpt {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin: 0 0 var(--space-3);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.discussion-item__stats {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.discussion-item__stat {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.discussion-item__stat .material-icons {
  font-size: 14px;
}

.discussion-item__author strong {
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
}

.discussion-item__time {
  margin-left: auto;
}

.discussion-item__status {
  flex-shrink: 0;
  align-self: flex-start;
}

/* Discussion Status */
.discussion-status {
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  white-space: nowrap;
}

.discussion-status--active {
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.discussion-status--solved {
  background: var(--color-info-bg);
  color: var(--color-info);
  border: 1px solid var(--color-info);
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-default);
}

.pagination__pages {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.pagination__page {
  min-width: 32px;
  height: 32px;
  padding: 0 var(--space-2);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  background: var(--color-bg-canvas);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pagination__page:hover {
  background: var(--color-bg-subtle);
  color: var(--color-text-primary);
  border-color: var(--color-border-muted);
}

.pagination__page--active {
  background: var(--color-text-link);
  color: #ffffff;
  border-color: var(--color-text-link);
}

.pagination__ellipsis {
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
  padding: 0 var(--space-2);
}

/* Community Stats & Progress Overview */
.community-stats {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.community-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.community-stat__number {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  line-height: 1;
}

.community-stat__label {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-1);
}

/* Progress Overview */
.progress-overview {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.progress-page .dark-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
  padding: var(--space-3xl);
}

.progress-page .content-card {
  margin: 0;
}

.progress-page .content-card__header {
  align-items: flex-start;
  gap: var(--space-md);
}

.progress-page .content-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.progress-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-2);
  background: var(--color-bg-subtle);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-default);
}

.progress-stat__number {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  line-height: 1;
}

.progress-stat__label {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

/* Responsive Design */
@media (max-width: 768px) {
  .discussion-header {
    flex-direction: column;
    gap: var(--space-4);
    align-items: stretch;
  }
  
  .discussion-header__main {
    max-width: 100%;
  }
  
  .discussion-filters {
    flex-direction: column;
    gap: var(--space-3);
    align-items: stretch;
  }
  
  .discussion-filters__search {
    max-width: none;
  }
  
  .discussion-filters__tabs {
    flex-wrap: wrap;
  }
  
  .discussion-item {
    flex-direction: column;
    gap: var(--space-3);
  }
  
  .discussion-item__avatar {
    align-self: flex-start;
  }
  
  .discussion-item__stats {
    flex-wrap: wrap;
    gap: var(--space-2);
  }
  
  .discussion-item__time {
    margin-left: 0;
  }
  
  .pagination {
    flex-wrap: wrap;
  }
  
  .community-stats {
    flex-direction: row;
    justify-content: space-around;
  }
}

@media (max-width: 480px) {
  .filter-tab {
    font-size: var(--text-xs);
    padding: var(--space-1) var(--space-2);
  }
  
  .discussion-item__title {
    font-size: var(--text-base);
  }
  
  .discussion-item__stats {
    font-size: 11px;
  }
}
/* File Browser Style Components - GitHub Style */

/* File Browser Container */
.file-browser {
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  background: var(--color-bg-canvas);
  overflow: hidden;
}

/* File Browser Header */
.file-browser__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-subtle);
  border-bottom: 1px solid var(--color-border-default);
  gap: var(--space-4);
}

.file-browser__header-left {
  flex: 1;
  min-width: 0;
}

.file-browser__title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-1) 0;
}

.file-browser__meta {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

/* Search Input */
.file-browser__search {
  flex-shrink: 0;
  min-width: 240px;
}

.search-input-container {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input {
  width: 100%;
  min-width: 0;
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-8);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  background: var(--color-bg-primary);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  transition: all var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-text-link);
  box-shadow: var(--shadow-focus);
}

.search-input::placeholder {
  color: var(--color-text-tertiary);
}

.search-icon {
  position: absolute;
  left: var(--space-2);
  color: var(--color-text-tertiary);
  font-size: 16px;
  pointer-events: none;
  z-index: 1;
}

.search-clear {
  position: absolute;
  right: var(--space-2);
  background: none;
  border: none;
  color: var(--color-text-tertiary);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-clear:hover {
  background: var(--color-bg-subtle);
  color: var(--color-text-secondary);
}

.search-clear .material-icons {
  font-size: 16px;
}

/* File Browser List */
.file-browser__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

/* File Browser Item */
.file-browser__item {
  display: flex;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border-default);
  transition: all var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  position: relative;
}

.file-browser__item:hover {
  background: var(--color-bg-subtle);
  transform: translateX(2px);
  box-shadow: var(--shadow-sm);
}

.file-browser__item:focus-visible {
  outline: 2px solid var(--color-text-link);
  outline-offset: -2px;
  background: var(--color-bg-subtle);
}

.file-browser__item:last-child {
  border-bottom: none;
}

.file-browser__item:active {
  transform: translateX(1px);
}

/* File Browser Icon */
.file-browser__icon {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  margin-right: var(--space-3);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.file-browser__icon--folder {
  color: #54aeff;
}

.file-browser__icon--lesson {
  color: #1f883d;
}

.file-browser__icon--completed {
  color: #0969da;
}

/* File Browser Content */
.file-browser__content {
  flex: 1;
  min-width: 0;
}

.file-browser__name {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
  line-height: var(--leading-tight);
}

.file-browser__description {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* File Browser Meta */
.file-browser__item-meta {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.file-browser__status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: var(--font-medium);
  text-transform: uppercase;
  letter-spacing: 0.025em;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.file-browser__status--completed {
  background: var(--color-success-bg);
  color: var(--color-success);
  border-color: var(--color-success);
}

.file-browser__status--completed .material-icons {
  color: var(--color-success);
}

.file-browser__status--in-progress {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border-color: var(--color-warning);
}

.file-browser__status--in-progress .material-icons {
  color: var(--color-warning);
}

.file-browser__status--not-started {
  background: var(--color-bg-tertiary);
  color: var(--color-text-tertiary);
  border-color: var(--color-border-default);
}

.file-browser__status--not-started .material-icons {
  color: var(--color-text-tertiary);
}

/* Progress indicator animation */
.file-browser__status--in-progress .material-icons {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* File Browser Directory */
.file-browser__directory {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-canvas);
  border-bottom: 1px solid var(--color-border-default);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.file-browser__directory-icon {
  width: 16px;
  height: 16px;
  color: var(--color-text-tertiary);
}

.file-browser__breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.file-browser__breadcrumb-link {
  color: var(--color-text-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.file-browser__breadcrumb-link:hover {
  text-decoration: underline;
}

.file-browser__breadcrumb-separator {
  color: var(--color-text-tertiary);
  margin: 0 var(--space-1);
}

/* File Browser Actions */
.file-browser__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.file-browser__action {
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  background: var(--color-bg-canvas);
  color: var(--color-text-secondary);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.file-browser__action:hover {
  background: var(--color-bg-subtle);
  color: var(--color-text-primary);
  border-color: var(--color-border-muted);
}

.file-browser__action--primary {
  background: var(--color-text-link);
  color: #ffffff;
  border-color: var(--color-text-link);
}

.file-browser__action--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #ffffff;
}

/* File Browser Tree View */
.file-browser__tree {
  padding-left: var(--space-4);
}

.file-browser__tree .file-browser__item {
  padding-left: var(--space-6);
  position: relative;
}

.file-browser__tree .file-browser__item::before {
  content: '';
  position: absolute;
  left: var(--space-4);
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--color-border-default);
}

.file-browser__tree .file-browser__item::after {
  content: '';
  position: absolute;
  left: var(--space-4);
  top: 50%;
  width: var(--space-3);
  height: 1px;
  background: var(--color-border-default);
}

/* Responsive Design */
@media (max-width: 768px) {
  .file-browser__header {
    flex-direction: column;
    gap: var(--space-3);
    align-items: flex-start;
  }
  
  .file-browser__search {
    width: 100%;
    min-width: auto;
  }
  
  .file-browser__item {
    padding: var(--space-3);
  }
  
  .file-browser__item-meta {
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-1);
  }
  
  .file-browser__actions {
    flex-wrap: wrap;
  }
  
  .file-browser__directory {
    padding: var(--space-2) var(--space-3);
  }
  
  .search-input-container {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .file-browser__item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-3);
  }
  
  .file-browser__content {
    width: 100%;
  }
  
  .file-browser__item-meta {
    align-self: stretch;
    justify-content: space-between;
    flex-direction: row;
  }
  
  .file-browser__header {
    padding: var(--space-3);
  }
  
  .search-input {
    font-size: var(--text-base);
  }
  
  .file-browser__status {
    font-size: 10px;
    padding: 2px var(--space-1);
  }
}
/* Debug Panel Component */
.debug-panel {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  width: 90vw;
  max-width: 600px;
  max-height: 80vh;
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  overflow: hidden;
}

.debug-panel.active {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.debug-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
  background: var(--color-bg-secondary);
}

.debug-panel__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.debug-panel__close {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.debug-panel__close:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.debug-panel__content {
  padding: var(--space-lg);
  max-height: calc(80vh - 120px);
  overflow-y: auto;
}

.debug-section {
  margin-bottom: var(--space-xl);
}

.debug-section__title {
  font-size: var(--text-md);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-md) 0;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  justify-content: space-between;
}

.debug-log-actions {
  display: flex;
  gap: var(--space-sm);
}

.debug-btn--small {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--text-xs);
}

.debug-log-count {
  margin-top: var(--space-sm);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-border-light);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  text-align: center;
}

.debug-info {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
}

.debug-info__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.debug-info__row:last-child {
  border-bottom: none;
}

.debug-info__label {
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.debug-info__value {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
}

.debug-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.debug-btn {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.debug-btn:hover {
  background: var(--color-primary-dark);
}

.debug-btn--secondary {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-light);
}

.debug-btn--secondary:hover {
  background: var(--color-bg-secondary);
}

.debug-btn--danger {
  background: var(--color-danger);
}

.debug-btn--danger:hover {
  background: var(--color-danger-dark);
}

.debug-logs {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  max-height: 200px;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.4;
}

.debug-log-entry {
  margin-bottom: var(--space-xs);
  color: var(--color-text-secondary);
}

.debug-log-entry.error {
  color: var(--color-danger);
}

.debug-log-entry.warning {
  color: var(--color-warning);
}

.debug-log-entry.success {
  color: var(--color-success);
}

.debug-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.debug-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Status indicators */
.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
}

.status-indicator.online {
  background: var(--color-success-light);
  color: var(--color-success-dark);
}

.status-indicator.offline {
  background: var(--color-danger-light);
  color: var(--color-danger-dark);
}

.status-indicator.updating {
  background: var(--color-warning-light);
  color: var(--color-warning-dark);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* Responsive */
@media (max-width: 768px) {
  .debug-panel {
    width: 95vw;
    max-height: 85vh;
  }
  
  .debug-panel__content {
    padding: var(--space-md);
    max-height: calc(85vh - 100px);
  }
  
  .debug-actions {
    flex-direction: column;
  }
  
  .debug-btn {
    justify-content: center;
  }
  
  .debug-info__row {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }
}
/* Enhanced Feedback Components for French Learning */

/* Success Feedback */
.feedback--success {
  background: linear-gradient(135deg, var(--color-success-bg), var(--color-success));
  color: var(--color-text-inverse);
  border: 1px solid var(--color-success);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  box-shadow: var(--shadow-lg);
  animation: successPop 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  position: relative;
  overflow: hidden;
}

.feedback--success::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shimmerSuccess 1.5s ease-out;
}

.feedback--error {
  background: linear-gradient(135deg, var(--color-error-bg), var(--color-error));
  color: var(--color-text-inverse);
  border: 1px solid var(--color-error);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  box-shadow: var(--shadow-lg);
  animation: errorShake 0.5s ease-in-out;
}

.feedback--warning {
  background: linear-gradient(135deg, var(--color-warning-bg), var(--color-warning));
  color: var(--color-text-inverse);
  border: 1px solid var(--color-warning);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  box-shadow: var(--shadow-lg);
  animation: warningPulse 0.8s ease-in-out;
}

/* Activity Completion Celebration */
.celebration-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: var(--z-toast);
}

.confetti-particle {
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--color-accent);
  animation: confettiFall 3s ease-out forwards;
}

.confetti-particle:nth-child(odd) {
  background: var(--color-primary);
  border-radius: 50%;
}

.confetti-particle:nth-child(3n) {
  background: var(--color-success);
  transform: rotate(45deg);
}

/* Progress Ring Animation */
.progress-ring {
  width: 60px;
  height: 60px;
  transform: rotate(-90deg);
}

.progress-ring__circle {
  stroke: var(--color-primary);
  stroke-width: 4;
  stroke-linecap: round;
  fill: transparent;
  stroke-dasharray: 188.5;
  stroke-dashoffset: 188.5;
  transition: stroke-dashoffset var(--transition-slow);
}

.progress-ring--animated .progress-ring__circle {
  animation: progressFill 1.5s ease-out forwards;
}

/* Streak Counter Animation */
.streak-counter {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: linear-gradient(135deg, var(--color-warning-bg), var(--color-warning));
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-md);
  animation: streakBounce 0.6s ease-out;
}

.streak-counter .material-icons {
  animation: fireFlicker 2s infinite alternate;
}

/* Achievement Badge */
.achievement-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: linear-gradient(135deg, var(--color-accent), var(--color-warning));
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-xl);
  font-weight: var(--font-semibold);
  box-shadow: var(--shadow-lg);
  animation: achievementAppear 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  position: relative;
  overflow: hidden;
}

.achievement-badge::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: conic-gradient(from 0deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: achievementGlow 2s linear infinite;
}

/* Keyframe Animations */
@keyframes successPop {
  0% {
    transform: scale(0.8) translateY(20px);
    opacity: 0;
  }
  50% {
    transform: scale(1.1) translateY(-5px);
    opacity: 0.9;
  }
  100% {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
}

@keyframes errorShake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
  20%, 40%, 60%, 80% { transform: translateX(5px); }
}

@keyframes warningPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes shimmerSuccess {
  0% { left: -100%; }
  100% { left: 100%; }
}

@keyframes confettiFall {
  0% {
    transform: translateY(-100vh) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(100vh) rotate(720deg);
    opacity: 0;
  }
}

@keyframes progressFill {
  from {
    stroke-dashoffset: 188.5;
  }
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes streakBounce {
  0% {
    transform: scale(0.8);
    opacity: 0;
  }
  50% {
    transform: scale(1.2);
    opacity: 0.8;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes fireFlicker {
  0% { transform: scale(1) rotate(-2deg); }
  100% { transform: scale(1.1) rotate(2deg); }
}

@keyframes achievementAppear {
  0% {
    transform: scale(0) rotate(-180deg);
    opacity: 0;
  }
  50% {
    transform: scale(1.2) rotate(-90deg);
    opacity: 0.8;
  }
  100% {
    transform: scale(1) rotate(0deg);
    opacity: 1;
  }
}

@keyframes achievementGlow {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Toast Notifications */
.toast {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  max-width: 400px;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  animation: slideIn 0.3s ease-out;
}

/* Update Notifications - Centralized styles for simple-update-fallback.js */
.update-notification {
  position: fixed;
  top: 80px;
  right: 1rem;
  width: 380px;
  max-width: calc(100vw - 2rem);
  background: var(--card, #fff);
  border: 1px solid var(--border, #ddd);
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 9999;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  padding: 1rem;
  backdrop-filter: blur(8px);
}

.update-notification.show {
  transform: translateX(0);
}

.update-notification.hide {
  transform: translateX(100%);
}
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-6);
  box-shadow: var(--shadow-floating);
  z-index: var(--z-toast);
  animation: toastSlideIn 0.3s ease-out;
  max-width: 400px;
  min-width: 300px;
}

.toast--success {
  border-left: 4px solid var(--color-success);
}

.toast--error {
  border-left: 4px solid var(--color-error);
}

.toast--warning {
  border-left: 4px solid var(--color-warning);
}

@keyframes toastSlideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* Interactive Elements Enhancements */
.interactive-element {
  transition: all var(--transition-normal);
  cursor: pointer;
  position: relative;
}

.interactive-element:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.interactive-element:active {
  transform: translateY(0);
  transition: transform var(--transition-fast);
}

.interactive-element--correct {
  animation: correctBounce 0.6s ease-out;
  background: var(--color-success-bg);
  border-color: var(--color-success);
}

.interactive-element--incorrect {
  animation: incorrectShake 0.5s ease-out;
  background: var(--color-error-bg);
  border-color: var(--color-error);
}

@keyframes correctBounce {
  0%, 100% { transform: scale(1); }
  25% { transform: scale(1.1); }
  50% { transform: scale(0.95); }
  75% { transform: scale(1.05); }
}

@keyframes incorrectShake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-3px); }
  20%, 40%, 60%, 80% { transform: translateX(3px); }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  .feedback--success,
  .feedback--error,
  .feedback--warning,
  .achievement-badge,
  .streak-counter,
  .interactive-element--correct,
  .interactive-element--incorrect {
    animation: none;
  }
  
  .progress-ring__circle {
    transition: none;
  }
  
  .confetti-particle {
    display: none;
  }
}

/* UI Enhancement Styles - Extracted from ui-enhancer.js */

/* Ripple Effect for Buttons */
.btn-ripple {
  position: relative;
  overflow: hidden;
}

.ripple-effect {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.6);
  transform: scale(0);
  animation: ripple 0.6s linear;
  pointer-events: none;
  width: 20px;
  height: 20px;
}

@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* Toast Container */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: var(--z-toast);
  max-width: 350px;
  pointer-events: none;
}

.toast {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-sm);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  animation: toastSlideIn 0.3s ease-out;
  pointer-events: auto;
}

.toast.success {
  border-left: 4px solid var(--color-success);
}

.toast.error {
  border-left: 4px solid var(--color-error);
}

.toast.warning {
  border-left: 4px solid var(--color-warning);
}

.toast.info {
  border-left: 4px solid var(--color-info);
}

.toast-close {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}

.toast-close:hover {
  background: rgba(0, 0, 0, 0.1);
}

.toast-close .material-icons {
  font-size: 1rem;
}

@keyframes toastSlideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes toastSlideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

/* Hover Effects */
.interactive-hover {
  transition: transform var(--transition-normal);
}

.interactive-hover:hover {
  transform: translateY(-2px);
}

/* Loading and Success States for Buttons */
.btn--loading {
  position: relative;
  color: transparent !important;
}

.btn--loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.btn--success {
  background: var(--color-success) !important;
  border-color: var(--color-success) !important;
}

@keyframes spin {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Card Hover Effects */
.card-interactive {
  transition: transform var(--transition-fast);
}

.card-interactive:active {
  transform: scale(0.98);
}

/* Success Overlay */
.success-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(16, 185, 129, 0.1);
  z-index: var(--z-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(2px);
  animation: fadeIn 0.3s ease-out;
}

.success-message {
  background: var(--color-bg-primary);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  text-align: center;
  animation: scaleIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

@keyframes scaleIn {
  from {
    transform: scale(0.8);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}
/* Enhanced Dashboard Components for French Learning */

/* Dashboard Layout Enhancements */
.dashboard {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-4);
}

.dashboard__header {
  text-align: center;
  margin-bottom: var(--space-8);
  animation: fadeInUp 0.6s ease-out;
}

.dashboard__title {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
  background: linear-gradient(135deg, var(--color-text-primary), var(--color-primary));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.dashboard__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

/* Enhanced Welcome Banner */
.welcome-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  animation: slideInBounce 0.8s ease-out;
}

.welcome-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at top right, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.welcome-banner__content {
  position: relative;
  z-index: 1;
  color: var(--color-text-inverse);
  text-align: center;
}

.welcome-banner__icon {
  font-size: 4rem;
  margin-bottom: var(--space-4);
  animation: welcomeFloat 3s ease-in-out infinite;
}

.welcome-banner__title {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-3);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.welcome-banner__text {
  font-size: var(--text-lg);
  opacity: 0.9;
  margin-bottom: var(--space-6);
}

.welcome-banner__streak {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(255, 255, 255, 0.2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-weight: var(--font-semibold);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.welcome-banner__streak .material-icons {
  color: var(--color-warning);
  animation: fireFlicker 2s infinite alternate;
}

/* Statistics Cards Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.stat-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-5), 3vw, var(--space-6));
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: var(--space-4);
  text-align: left;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  animation: fadeInScale 0.6s ease-out;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient);
  transition: opacity var(--transition-normal);
  opacity: 0;
}

.stat-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-floating);
  border-color: var(--color-primary);
}

.stat-card:hover::before {
  opacity: 1;
}

.stat-card--children::before {
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.stat-card--lessons::before {
  background: linear-gradient(90deg, var(--color-success), var(--color-primary));
}

.stat-card--progress::before {
  background: linear-gradient(90deg, var(--color-accent), var(--color-warning));
}

.stat-card--stars::before {
  background: linear-gradient(90deg, var(--color-warning), var(--color-accent));
}

.stat-card--achievements::before {
  background: linear-gradient(90deg, var(--color-success), var(--color-accent));
}

.stat-card__icon {
  width: 56px;
  height: 56px;
  background: var(--icon-bg);
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--icon-color);
  position: relative;
  transition: transform var(--transition-normal);
}

.stat-card:hover .stat-card__icon {
  transform: scale(1.1);
}

.stat-card--children .stat-card__icon {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.stat-card--lessons .stat-card__icon {
  background: var(--color-success);
  color: var(--color-text-inverse);
}

.stat-card--progress .stat-card__icon {
  background: var(--color-accent);
  color: var(--color-text-inverse);
}

.stat-card--stars .stat-card__icon {
  background: var(--color-warning);
  color: var(--color-text-inverse);
}

.stat-card--achievements .stat-card__icon {
  background: var(--color-success);
  color: var(--color-text-inverse);
}

.stat-card__text {
  display: grid;
  gap: var(--space-xs);
}

.stat-card__value {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin: 0;
  line-height: 1;
  animation: countUp 1s ease-out;
}

.stat-card__label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0;
}

@media (max-width: 480px) {
  .stat-card {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
    gap: var(--space-3);
  }

  .stat-card__icon {
    margin-inline: auto;
  }

  .stat-card__text {
    width: 100%;
    text-align: center;
  }
}

/* Goals and Achievements Section */
.goals-achievements {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.goals-card,
.achievements-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

.section-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.section-header__title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.section-header__icon {
  font-size: 24px;
  color: var(--color-primary);
}

.goal-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--color-bg-subtle);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-3);
  transition: all var(--transition-normal);
}

.goal-item:hover {
  transform: translateX(4px);
  background: var(--color-bg-tertiary);
}

.goal-item__icon {
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.goal-item__content {
  flex: 1;
}

.goal-item__title {
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.goal-item__description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* Progress Visualization */
.progress-ring {
  width: 80px;
  height: 80px;
  transform: rotate(-90deg);
}

.progress-ring__circle {
  stroke: var(--color-primary);
  stroke-width: 6;
  stroke-linecap: round;
  fill: transparent;
  stroke-dasharray: 251.2;
  stroke-dashoffset: 251.2;
  transition: stroke-dashoffset var(--transition-slow);
}

.progress-ring--animated .progress-ring__circle {
  animation: progressFill 2s ease-out forwards;
}

/* Children Progress Cards */
.children-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.child-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.6s ease-out;
}

.child-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-floating);
}

.child-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.child-avatar {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-inverse);
  font-size: 24px;
  box-shadow: var(--shadow-md);
}

.child-info h3 {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.child-info p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.child-progress {
  margin-bottom: var(--space-4);
}

.progress-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2);
}

.progress-label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.progress-value {
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.child-actions {
  display: flex;
  gap: var(--space-2);
}

.action-btn {
  flex: 1;
  padding: var(--space-3);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  color: var(--color-text-primary);
  text-decoration: none;
  text-align: center;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  transition: all var(--transition-normal);
}

.action-btn:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Empty States */
.empty-state {
  text-align: center;
  padding: var(--space-8);
  background: var(--color-bg-subtle);
  border-radius: var(--radius-xl);
  border: 2px dashed var(--color-border-muted);
}

.empty-state__icon {
  font-size: 4rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  opacity: 0.6;
}

.empty-state h3 {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.empty-state p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

/* Animation Keyframes */
@keyframes welcomeFloat {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

@keyframes fireFlicker {
  0% { transform: scale(1) rotate(-2deg); }
  100% { transform: scale(1.1) rotate(2deg); }
}

@keyframes countUp {
  from { transform: scale(0.8); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

@keyframes progressFill {
  from { stroke-dashoffset: 251.2; }
  to { stroke-dashoffset: calc(251.2 - (251.2 * var(--progress, 0)) / 100); }
}

/* Responsive Design */
@media (max-width: 768px) {
  .dashboard {
    padding: var(--space-4) var(--space-3);
  }
  
  .welcome-banner {
    padding: var(--space-6);
  }
  
  .welcome-banner__title {
    font-size: var(--text-2xl);
  }
  
  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
  }
  
  .goals-achievements {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  
  .children-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  
  .child-actions {
    flex-direction: column;
  }
  
  .action-btn {
    flex: none;
  }
}

/* Quick Actions */
.quick-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.quick-action {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  text-decoration: none;
  color: var(--color-text-primary);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  animation: fadeInUp 0.6s ease-out;
}

.quick-action:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-floating);
  border-color: var(--color-primary);
}

.quick-action__icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
  transition: all var(--transition-normal);
}

.quick-action:hover .quick-action__icon {
  transform: scale(1.1);
  background: var(--color-primary-dark);
}

.quick-action__content h3 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

.quick-action__content p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* User Progress Styles - Extracted from app.js */
.user-progress-info {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.achievement-badge,
.score-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-bg-primary);
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border-default);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.achievement-badge .material-icons {
  color: #f59e0b;
}

.score-badge .material-icons {
  color: #10b981;
}

.motivation-message {
  color: var(--color-text-secondary);
}

.motivation-message .material-icons {
  font-size: 1rem;
  vertical-align: middle;
}

@media (max-width: 600px) {
  .user-progress-info {
    flex-direction: column;
    align-items: center;
  }
  
  .achievement-badge,
  .score-badge {
    width: 100%;
    justify-content: center;
  }
}
/* Pagination Component for Large Lesson Sets */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-2);
  margin: var(--space-6) 0;
  padding: var(--space-4);
  background: var(--color-bg-subtle);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
}

.pagination__info {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-right: var(--space-4);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.pagination__controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.pagination__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border-default);
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

.pagination__btn:hover:not(:disabled) {
  background: var(--color-bg-interactive);
  border-color: var(--color-border-interactive);
  transform: translateY(-1px);
}

.pagination__btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background: var(--color-bg-disabled);
}

.pagination__btn--current {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  border-color: var(--color-primary);
  font-weight: var(--font-semibold);
}

.pagination__btn--current:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.pagination__ellipsis {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
}

/* Page size selector */
.page-size-selector {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: var(--space-4);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.page-size-selector select {
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  font-size: var(--text-sm);
}

/* Responsive pagination */
@media (max-width: 768px) {
  .pagination {
    flex-wrap: wrap;
    gap: var(--space-1);
  }
  
  .pagination__info {
    order: 3;
    width: 100%;
    justify-content: center;
    margin: var(--space-2) 0 0 0;
  }
  
  .pagination__btn {
    width: 32px;
    height: 32px;
    font-size: var(--text-xs);
  }
  
  .page-size-selector {
    margin-left: 0;
    margin-top: var(--space-2);
  }
}

/* Loading state for pagination */
.pagination--loading {
  opacity: 0.6;
  pointer-events: none;
}

.pagination--loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border-subtle);
  border-top: 2px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}
/* Enhanced Filters for Large Lesson Sets */
.lessons-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  padding: var(--space-4);
  background: var(--color-bg-subtle);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  margin-bottom: var(--space-4);
}

.filter-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.filter-label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.filter-select {
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  font-size: var(--text-sm);
  min-width: 120px;
  transition: all var(--transition-fast);
}

.filter-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-alpha);
}

.filter-select:hover {
  border-color: var(--color-border-interactive);
}

/* Filter chips for active filters */
.active-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.filter-chip {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  background: var(--color-primary-bg);
  color: var(--color-primary);
  border: 1px solid var(--color-primary-alpha);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
}

.filter-chip__remove {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  background: transparent;
  border: none;
  color: var(--color-primary);
  cursor: pointer;
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.filter-chip__remove:hover {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
}

.filter-chip__remove .material-icons {
  font-size: 12px;
}

/* Clear all filters button */
.clear-filters-btn {
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: 1px solid var(--color-border-default);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.clear-filters-btn:hover {
  background: var(--color-error-bg);
  border-color: var(--color-error);
  color: var(--color-error);
}

/* Filter toggle for mobile */
.filters-toggle {
  display: none;
}

/* Enhanced search with filters */
.search-with-filters {
  position: relative;
}

.search-filters-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: var(--shadow-dropdown);
  z-index: 100;
  max-height: 300px;
  overflow-y: auto;
}

.search-filter-option {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.search-filter-option:hover {
  background: var(--color-bg-interactive);
}

.search-filter-option.selected {
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

/* Sort controls */
.sort-controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.sort-button {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  color: var(--color-text-primary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--text-sm);
}

.sort-button:hover {
  background: var(--color-bg-interactive);
  border-color: var(--color-border-interactive);
}

.sort-button.active {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  border-color: var(--color-primary);
}

.sort-button .material-icons {
  font-size: 16px;
  transition: transform var(--transition-fast);
}

.sort-button.desc .material-icons {
  transform: rotate(180deg);
}

/* Results summary */
.filters-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border-subtle);
  margin-bottom: var(--space-4);
}

.results-count {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.results-count strong {
  color: var(--color-text-primary);
  font-weight: var(--font-semibold);
}

/* Responsive design */
@media (max-width: 768px) {
  .lessons-filters {
    position: relative;
  }
  
  .filters-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--text-sm);
    color: var(--color-text-primary);
  }
  
  .filter-group:not(.always-visible) {
    display: none;
  }
  
  .lessons-filters.expanded .filter-group {
    display: flex;
    width: 100%;
  }
  
  .lessons-filters.expanded {
    flex-direction: column;
    align-items: stretch;
  }
  
  .filter-select {
    min-width: auto;
    flex: 1;
  }
  
  .sort-controls {
    justify-content: center;
    flex-wrap: wrap;
  }
}
/* Certificate Component Styles */
/* Extracted from certificate-generator.js inline styles */

/* Certificate Modal */
.certificate-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: modalFadeIn 0.3s ease;
}

.certificate-modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
}

.certificate-modal-content {
  position: relative;
  background: white;
  border-radius: 12px;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: modalSlideUp 0.4s ease;
}

.certificate-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid #eee;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border-radius: 12px 12px 0 0;
}

.certificate-modal-header h3 {
  margin: 0;
  font-size: 1.25rem;
}

.certificate-close {
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
  line-height: 1;
  opacity: 0.8;
  transition: opacity 0.2s;
}

.certificate-close:hover {
  opacity: 1;
}

.certificate-container {
  padding: 2rem;
  background: #f8f9fa;
}

/* Certificate Document */
.certificate {
  background: white;
  max-width: 600px;
  margin: 0 auto;
  font-family: Georgia, serif;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.certificate-border {
  border: 8px solid #d4af37;
  border-image: linear-gradient(45deg, #d4af37, #ffd700, #d4af37) 1;
  padding: 2rem;
  position: relative;
}

.certificate-header {
  text-align: center;
  margin-bottom: 2rem;
  position: relative;
}

.certificate-logo {
  font-size: 3rem;
  color: #d4af37;
  margin-bottom: 1rem;
}

.certificate-header h1 {
  font-size: 2rem;
  color: #2c3e50;
  margin: 0;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}

.certificate-ribbon {
  position: absolute;
  top: -1rem;
  right: -1rem;
  width: 60px;
  height: 60px;
  background: #e74c3c;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 50% 100%, 0 70%);
}

.certificate-ribbon.gold {
  background: #d4af37;
}

.certificate-ribbon.achievement {
  background: #9b59b6;
}

.certificate-body {
  text-align: center;
  position: relative;
  margin-bottom: 2rem;
}

.certificate-intro {
  font-size: 1.1rem;
  color: #7f8c8d;
  margin-bottom: 0.5rem;
}

.student-name {
  font-size: 2.5rem;
  color: #2c3e50;
  margin: 1rem 0;
  text-decoration: underline;
  text-decoration-color: #d4af37;
  text-underline-offset: 8px;
}

.certificate-content {
  font-size: 1.2rem;
  line-height: 1.6;
  color: #34495e;
  margin: 1.5rem 0;
}

.certificate-score {
  margin: 2rem 0;
}

.score-circle {
  display: inline-block;
  width: 120px;
  height: 120px;
  border: 4px solid #d4af37;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #ffd700, #d4af37);
  color: white;
}

.score-value {
  font-size: 2rem;
  font-weight: bold;
}

.score-label {
  font-size: 0.9rem;
  opacity: 0.9;
}

.certificate-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin: 2rem 0;
}

.stat-item {
  text-align: center;
}

.stat-value {
  display: block;
  font-size: 1.8rem;
  font-weight: bold;
  color: #d4af37;
}

.stat-label {
  font-size: 0.9rem;
  color: #7f8c8d;
}

.certificate-date {
  font-style: italic;
  color: #7f8c8d;
  margin-top: 2rem;
}

/* Certificate Decorations */
.certificate-decoration {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  pointer-events: none;
}

.decoration-star {
  position: absolute;
  font-size: 1.5rem;
  opacity: 0.3;
  animation: twinkle 2s infinite;
}

.star-1 {
  top: 10%;
  left: 10%;
  animation-delay: 0s;
}

.star-2 {
  top: 20%;
  right: 15%;
  animation-delay: 0.7s;
}

.star-3 {
  bottom: 30%;
  left: 20%;
  animation-delay: 1.4s;
}

.decoration-laurel {
  position: absolute;
  top: -10px;
  left: -10px;
  right: -10px;
  bottom: -10px;
  background-image: radial-gradient(circle at 20% 20%, rgba(212, 175, 55, 0.1) 2px, transparent 2px),
                    radial-gradient(circle at 80% 80%, rgba(212, 175, 55, 0.1) 2px, transparent 2px);
  background-size: 30px 30px;
}

.decoration-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 3rem;
  animation: bounce 2s infinite;
}

.certificate-footer {
  border-top: 2px solid #d4af37;
  padding-top: 1rem;
  margin-top: 2rem;
}

.signature-section {
  display: flex;
  justify-content: center;
}

.signature-line {
  text-align: center;
  min-width: 200px;
}

.signature {
  font-size: 1.2rem;
  font-weight: bold;
  color: #2c3e50;
  border-bottom: 2px solid #2c3e50;
  padding-bottom: 0.5rem;
  margin-bottom: 0.25rem;
}

.signature .title {
  font-size: 0.9rem;
  color: #7f8c8d;
}

.certificate-modal-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  padding: 1.5rem;
  border-top: 1px solid #eee;
  background: #f8f9fa;
  border-radius: 0 0 12px 12px;
}

.achievement-description {
  font-style: italic;
  color: #7f8c8d;
  margin: 1rem 0;
}

/* Confetti Animation */
.confetti-container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 1999;
  overflow: hidden;
}

.confetti-piece {
  position: absolute;
  width: 10px;
  height: 10px;
  opacity: 0.8;
  animation: confettiFall 3s linear forwards;
}

.confetti-piece:nth-child(odd) {
  background: #ff6b6b;
  border-radius: 50%;
}

.confetti-piece:nth-child(even) {
  background: #4ecdc4;
  transform: rotate(45deg);
}

.confetti-piece:nth-child(3n) {
  background: #45b7d1;
}

.confetti-piece:nth-child(4n) {
  background: #f9ca24;
}

.confetti-piece:nth-child(5n) {
  background: #6c5ce7;
}

/* Confetti animation variations for random positioning and timing */
.confetti-piece.left { left: 10%; }
.confetti-piece.center-left { left: 30%; }
.confetti-piece.center { left: 50%; }
.confetti-piece.center-right { left: 70%; }
.confetti-piece.right { left: 90%; }

.confetti-piece.duration-fast { animation-duration: 2s; }
.confetti-piece.duration-medium { animation-duration: 3s; }
.confetti-piece.duration-slow { animation-duration: 5s; }

.confetti-piece.delay-short { animation-delay: 0.5s; }
.confetti-piece.delay-medium { animation-delay: 1s; }
.confetti-piece.delay-long { animation-delay: 1.5s; }

/* Animations */
@keyframes modalFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modalSlideUp {
  from {
    transform: translateY(50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes twinkle {
  0%, 100% {
    opacity: 0.3;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.2);
  }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

@keyframes confettiFall {
  0% {
    transform: translateY(-100vh) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(100vh) rotate(720deg);
    opacity: 0;
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .certificate-modal-content {
    margin: 1rem;
    max-width: calc(100vw - 2rem);
  }
  
  .certificate {
    font-size: 0.9rem;
  }
  
  .student-name {
    font-size: 2rem;
  }
  
  .certificate-stats {
    flex-direction: column;
    gap: 1rem;
  }
  
  .certificate-modal-actions {
    flex-direction: column;
  }
}

/* Print Styles */
@media print {
  body {
    margin: 0;
    padding: 0;
  }
  
  .certificate-modal-backdrop,
  .certificate-modal-header,
  .certificate-modal-actions {
    display: none !important;
  }
  
  .certificate-modal {
    position: static !important;
    background: white !important;
  }
  
  .certificate-modal-content {
    box-shadow: none !important;
    max-width: none !important;
    max-height: none !important;
  }
  
  .certificate-container {
    padding: 0 !important;
    background: white !important;
  }
  
  .certificate {
    box-shadow: none !important;
    page-break-inside: avoid;
  }
}

/* Utilities */
/* Layout Utilities */
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }
.block { display: block; }
.inline-block { display: inline-block; }
.hidden { display: none; }

/* Visibility Utilities */
.visible { visibility: visible; }
.invisible { visibility: hidden; }

/* Flex Direction */
.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.flex-row-reverse { flex-direction: row-reverse; }
.flex-col-reverse { flex-direction: column-reverse; }

/* Flex Wrap */
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }

/* Align Items */
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

/* Justify Content */
.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.justify-evenly { justify-content: space-evenly; }

/* Gap */
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.gap-2xl { gap: var(--space-2xl); }

/* Grid Templates */
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-auto { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

/* Spacing Utilities */
.m-0 { margin: 0; }
.m-xs { margin: var(--space-xs); }
.m-sm { margin: var(--space-sm); }
.m-md { margin: var(--space-md); }
.m-lg { margin: var(--space-lg); }
.m-xl { margin: var(--space-xl); }
.m-2xl { margin: var(--space-2xl); }
.m-auto { margin: auto; }

.mt-0 { margin-top: 0; }
.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

.ml-0 { margin-left: 0; }
.ml-xs { margin-left: var(--space-xs); }
.ml-sm { margin-left: var(--space-sm); }
.ml-md { margin-left: var(--space-md); }
.ml-lg { margin-left: var(--space-lg); }
.ml-xl { margin-left: var(--space-xl); }
.ml-auto { margin-left: auto; }

.mr-0 { margin-right: 0; }
.mr-xs { margin-right: var(--space-xs); }
.mr-sm { margin-right: var(--space-sm); }
.mr-md { margin-right: var(--space-md); }
.mr-lg { margin-right: var(--space-lg); }
.mr-xl { margin-right: var(--space-xl); }
.mr-auto { margin-right: auto; }

.p-0 { padding: 0; }
.p-xs { padding: var(--space-xs); }
.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }
.p-2xl { padding: var(--space-2xl); }
.p-3xl { padding: 2rem; }

.pt-0 { padding-top: 0; }
.pt-xs { padding-top: var(--space-xs); }
.pt-sm { padding-top: var(--space-sm); }
.pt-md { padding-top: var(--space-md); }
.pt-lg { padding-top: var(--space-lg); }
.pt-xl { padding-top: var(--space-xl); }
.pt-2xl { padding-top: var(--space-2xl); }

.pb-0 { padding-bottom: 0; }
.pb-xs { padding-bottom: var(--space-xs); }
.pb-sm { padding-bottom: var(--space-sm); }
.pb-md { padding-bottom: var(--space-md); }
.pb-lg { padding-bottom: var(--space-lg); }
.pb-xl { padding-bottom: var(--space-xl); }
.pb-2xl { padding-bottom: var(--space-2xl); }

.pl-0 { padding-left: 0; }
.pl-xs { padding-left: var(--space-xs); }
.pl-sm { padding-left: var(--space-sm); }
.pl-md { padding-left: var(--space-md); }
.pl-lg { padding-left: var(--space-lg); }
.pl-xl { padding-left: var(--space-xl); }

.pr-0 { padding-right: 0; }
.pr-xs { padding-right: var(--space-xs); }
.pr-sm { padding-right: var(--space-sm); }
.pr-md { padding-right: var(--space-md); }
.pr-lg { padding-right: var(--space-lg); }
.pr-xl { padding-right: var(--space-xl); }

/* Text Utilities */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }
.text-3xl { font-size: var(--text-3xl); }
.text-4xl { font-size: var(--text-4xl); }
.text-5xl { font-size: var(--text-5xl); }

/* Specific icon and text sizes for components */
.text-icon-lg { font-size: 3rem; }
.text-micro { font-size: 0.9rem; }

.font-light { font-weight: var(--font-light); }
.font-normal { font-weight: var(--font-normal); }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }

.leading-tight { line-height: var(--leading-tight); }
.leading-normal { line-height: var(--leading-normal); }
.leading-relaxed { line-height: var(--leading-relaxed); }

/* Color Utilities */
.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-inverse { color: var(--color-text-inverse); }
.text-muted { color: var(--muted); }
.text-light-gray { color: #666; }
.text-lighter-gray { color: #ddd; }

.bg-primary { background-color: var(--color-bg-primary); }
.bg-secondary { background-color: var(--color-bg-secondary); }
.bg-tertiary { background-color: var(--color-bg-tertiary); }

/* Border Utilities */
.border { border: 1px solid var(--color-border-light); }
.border-t { border-top: 1px solid var(--color-border-light); }
.border-b { border-bottom: 1px solid var(--color-border-light); }
.border-l { border-left: 1px solid var(--color-border-light); }
.border-r { border-right: 1px solid var(--color-border-light); }

.rounded-none { border-radius: 0; }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadow Utilities */
.shadow-none { box-shadow: none; }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* Width and Height */
.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }

/* Responsive Utilities */
@media (max-width: 768px) {
  .md\:hidden { display: none; }
  .md\:block { display: block; }
  .md\:flex { display: flex; }
  .md\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:text-center { text-align: center; }
}

@media (max-width: 480px) {
  .sm\:hidden { display: none; }
  .sm\:block { display: block; }
  .sm\:text-sm { font-size: var(--text-sm); }
  .sm\:text-base { font-size: var(--text-base); }
  .sm\:p-md { padding: var(--space-md); }
  .sm\:gap-sm { gap: var(--space-sm); }
}

/* Loading and Error States */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-3xl);
  text-align: center;
  min-height: 200px;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border-muted);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--space-lg);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.loading-state p {
  color: var(--color-text-secondary);
  font-size: var(--text-lg);
  margin: 0;
}

.error-state {
  margin: var(--space-lg);
  padding: var(--space-2xl);
  text-align: center;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-muted);
  border-radius: var(--radius-lg);
}

.error-state--full {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
}

.error-state--full .error-content {
  max-width: 520px;
  margin: 0 auto;
}

.error-content .material-icons {
  font-size: 3rem;
  color: var(--color-danger);
  margin-bottom: var(--space-lg);
  display: block;
}

.error-content h2 {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
}

.error-content p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  line-height: var(--leading-relaxed);
}

.error-details {
  margin-top: var(--space-xl);
  padding: var(--space-lg);
  text-align: left;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-muted);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
}

.error-details summary {
  cursor: pointer;
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.error-details code {
  display: block;
  background: var(--color-bg-tertiary);
  padding: var(--space-md);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  word-break: break-word;
}

.error-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 480px) {
  .error-actions {
    flex-direction: column;
    align-items: center;
  }

  .loading-state {
    padding: var(--space-xl);
    min-height: 150px;
  }

  .error-state {
    margin: var(--space-md);
    padding: var(--space-xl);
  }

  .error-state--full {
    min-height: 220px;
  }
}

/* Shimmer Loading Animation - Extracted from ui-enhancer.js */
.loading-shimmer {
  background: linear-gradient(90deg, 
    var(--color-bg-secondary) 25%, 
    var(--color-bg-tertiary) 50%, 
    var(--color-bg-secondary) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
  height: 40px;
  margin-bottom: var(--space-md);
}

.loading-shimmer--tall {
  height: 80px;
}

.loading-shimmer:last-child {
  margin-bottom: 0;
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}
/* Enhanced Animations - Modern French Learning Experience */

/* Keyframe Animations */
@keyframes slideInBounce {
  0% {
    transform: translateY(-20px) scale(0.95);
    opacity: 0;
  }
  50% {
    transform: translateY(5px) scale(1.02);
    opacity: 0.8;
  }
  100% {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

@keyframes slideIn {
  0% {
    transform: translateY(-10px);
    opacity: 0;
  }
  100% {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes fadeInUp {
  0% {
    transform: translateY(30px);
    opacity: 0;
  }
  100% {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes fadeInScale {
  0% {
    transform: scale(0.9);
    opacity: 0;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes wiggle {
  0%, 100% {
    transform: rotate(0deg);
  }
  25% {
    transform: rotate(-3deg);
  }
  75% {
    transform: rotate(3deg);
  }
}

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

@keyframes confetti {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(-100px) rotate(360deg);
    opacity: 0;
  }
}

/* Animation Classes */
.animate-slide-in-bounce {
  animation: slideInBounce 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.animate-slide-in {
  animation: slideIn 0.3s ease-out;
}

.animate-fade-in-up {
  animation: fadeInUp 0.5s ease-out;
}

.animate-fade-in-scale {
  animation: fadeInScale 0.3s ease-out;
}

.animate-pulse {
  animation: pulse 2s infinite;
}

.animate-wiggle {
  animation: wiggle 0.5s ease-in-out;
}

/* Hover Animations */
.hover-lift {
  transition: transform var(--transition-normal);
}

.hover-lift:hover {
  transform: translateY(-4px);
}

.hover-scale {
  transition: transform var(--transition-normal);
}

.hover-scale:hover {
  transform: scale(1.05);
}

.hover-glow {
  transition: box-shadow var(--transition-normal);
}

.hover-glow:hover {
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

/* Loading States */
.loading-shimmer {
  background: linear-gradient(
    90deg,
    var(--color-bg-secondary) 25%,
    var(--color-bg-tertiary) 50%,
    var(--color-bg-secondary) 75%
  );
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
}

/* Success Celebration */
.celebrate {
  animation: confetti 1s ease-out;
}

/* Stagger Animation for Lists */
.stagger-children > * {
  animation: fadeInUp 0.5s ease-out;
}

.stagger-children > *:nth-child(1) { animation-delay: 0.1s; }
.stagger-children > *:nth-child(2) { animation-delay: 0.2s; }
.stagger-children > *:nth-child(3) { animation-delay: 0.3s; }
.stagger-children > *:nth-child(4) { animation-delay: 0.4s; }
.stagger-children > *:nth-child(5) { animation-delay: 0.5s; }
.stagger-children > *:nth-child(6) { animation-delay: 0.6s; }

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .animate-pulse {
    animation: none;
  }
  
  .hover-lift:hover,
  .hover-scale:hover {
    transform: none;
  }
}
/* Enhanced Typography System for French Learning App */

/* Typography Scale Utilities */
.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }
.text-3xl { font-size: var(--text-3xl); }
.text-4xl { font-size: var(--text-4xl); }
.text-5xl { font-size: var(--text-5xl); }

/* Font Weight Utilities */
.font-light { font-weight: var(--font-light); }
.font-normal { font-weight: var(--font-normal); }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }

/* Line Height Utilities */
.leading-tight { line-height: var(--leading-tight); }
.leading-normal { line-height: var(--leading-normal); }
.leading-relaxed { line-height: var(--leading-relaxed); }

/* Text Color Utilities */
.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-muted { color: var(--color-text-muted); }
.text-link { color: var(--color-text-link); }
.text-success { color: var(--color-text-success); }
.text-warning { color: var(--color-text-warning); }
.text-error { color: var(--color-text-error); }
.text-inverse { color: var(--color-text-inverse); }

/* Enhanced Heading Styles */
.heading-hero {
  font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl));
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  letter-spacing: -0.025em;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  background: linear-gradient(135deg, var(--color-text-primary), var(--color-primary));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: headingGlow 3s ease-in-out infinite alternate;
}

.heading-section {
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
  position: relative;
  padding-bottom: var(--space-3);
}

.heading-section::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-full);
}

.heading-card {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.heading-small {
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

/* Enhanced Body Text Styles */
.body-large {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.body-base {
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.body-small {
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-2);
}

/* French Learning Specific Typography */
.french-text {
  font-style: italic;
  color: var(--color-primary);
  font-weight: var(--font-medium);
}

.english-text {
  color: var(--color-text-secondary);
}

.phonetic-text {
  font-family: var(--font-family-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  background: var(--color-bg-subtle);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-muted);
}

.lesson-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  text-align: center;
  position: relative;
}

.lesson-title::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-full);
}

.activity-title {
  font-size: var(--text-xl);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.activity-title .material-icons {
  color: var(--color-primary);
  font-size: 24px;
}

/* Enhanced Text Formatting */
.text-gradient {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-shadow {
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.text-shadow-lg {
  text-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.text-glow {
  text-shadow: 0 0 10px rgba(96, 165, 250, 0.5);
}

/* Reading Enhancement */
.reading-text {
  font-size: var(--text-lg);
  line-height: 1.8;
  color: var(--color-text-primary);
  max-width: 65ch;
  margin: 0 auto;
}

.reading-text p {
  margin-bottom: var(--space-4);
}

.reading-text strong {
  color: var(--color-primary);
  font-weight: var(--font-semibold);
}

.reading-text em {
  color: var(--color-text-link);
  font-style: italic;
}

/* Quote Styles */
.quote {
  position: relative;
  padding: var(--space-6);
  background: var(--color-bg-card);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-lg);
  margin: var(--space-6) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

.quote::before {
  content: '"';
  position: absolute;
  top: var(--space-2);
  left: var(--space-4);
  font-size: var(--text-4xl);
  color: var(--color-primary);
  opacity: 0.3;
  font-family: serif;
}

.quote-author {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-style: normal;
  font-weight: var(--font-medium);
}

.quote-author::before {
  content: '— ';
}

/* Code and Technical Text */
.code {
  font-family: var(--font-family-mono);
  font-size: var(--text-sm);
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border-muted);
  border-radius: var(--radius-sm);
  padding: var(--space-1) var(--space-2);
  color: var(--color-text-primary);
}

.code-block {
  font-family: var(--font-family-mono);
  font-size: var(--text-sm);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  color: var(--color-text-primary);
  overflow-x: auto;
  margin: var(--space-4) 0;
  line-height: var(--leading-relaxed);
}

/* Lists Enhancement */
.list-styled {
  padding-left: var(--space-6);
}

.list-styled li {
  margin-bottom: var(--space-2);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.list-styled li::marker {
  color: var(--color-primary);
}

.list-checklist {
  list-style: none;
  padding: 0;
}

.list-checklist li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  padding: var(--space-3);
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-default);
  transition: all var(--transition-normal);
}

.list-checklist li:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.list-checklist li::before {
  content: '✓';
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  background: var(--color-success);
  color: var(--color-text-inverse);
  border-radius: 50%;
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  flex-shrink: 0;
}

/* Progress Indicators in Text */
.progress-text {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
}

.progress-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border-muted);
}

.progress-dot.completed {
  background: var(--color-success);
  animation: progressPop 0.3s ease-out;
}

.progress-dot.current {
  background: var(--color-primary);
  animation: progressPulse 1.5s infinite;
}

/* Keyboard Key Styling */
.kbd {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  font-family: var(--font-family-mono);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  line-height: 1;
  color: var(--color-text-primary);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 0 var(--color-border-default);
  min-width: 1.5rem;
  text-align: center;
}

/* Animation Keyframes */
@keyframes headingGlow {
  0% { text-shadow: 0 0 5px rgba(96, 165, 250, 0.3); }
  100% { text-shadow: 0 0 20px rgba(96, 165, 250, 0.6); }
}

@keyframes progressPop {
  0% { transform: scale(0.8); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

@keyframes progressPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Responsive Typography */
@media (max-width: 768px) {
  .heading-hero {
    font-size: clamp(var(--text-2xl), 8vw, var(--text-4xl));
  }
  
  .heading-section {
    font-size: var(--text-2xl);
  }
  
  .reading-text {
    font-size: var(--text-base);
    max-width: none;
  }
  
  .quote {
    padding: var(--space-4);
    margin: var(--space-4) 0;
  }
}

/* Accessibility Enhancements */
@media (prefers-reduced-motion: reduce) {
  .heading-hero,
  .progress-dot.completed,
  .progress-dot.current {
    animation: none;
  }
  
  .text-glow {
    text-shadow: none;
  }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  .text-gradient {
    background: none;
    -webkit-text-fill-color: var(--color-text-primary);
    color: var(--color-text-primary);
  }
  
  .french-text {
    font-weight: var(--font-bold);
  }
  
  .phonetic-text {
    border-width: 2px;
  }
}
/* Performance Optimizations for Large Lesson Sets */

/* GPU acceleration for smooth animations */
.lesson-card--interactive {
  will-change: transform;
  transform: translateZ(0);
  backface-visibility: hidden;
}

/* Contain layout changes for better performance */
.lessons-grid {
  contain: layout style paint;
}

.lesson-card {
  contain: layout style paint;
}

/* Optimize lesson card animations */
.lesson-card--interactive:hover {
  transform: translateY(-4px) translateZ(0);
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reduce paint operations on scroll */
.lessons-container {
  transform: translateZ(0);
}

/* Optimize loading states */
.loading-spinner {
  animation: spin 1s linear infinite;
  will-change: transform;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* Virtual scrolling optimization (if enabled) */
.virtual-scroll-container {
  height: 100%;
  overflow-y: auto;
  will-change: scroll-position;
}

.virtual-scroll-spacer {
  height: var(--spacer-height, 0);
}

/* Lazy loading improvements */
.lesson-card[data-loading="true"] {
  background: var(--color-bg-skeleton);
  animation: skeleton-loading 1.5s ease-in-out infinite alternate;
}

@keyframes skeleton-loading {
  0% {
    opacity: 0.6;
  }
  100% {
    opacity: 0.8;
  }
}

/* Intersection observer optimizations */
.lesson-card {
  transition: opacity 0.3s ease-in-out;
  opacity: 1; /* Ensure lesson cards are visible by default */
}

/* Optional: Keep the visible class functionality for future use
.lesson-card:not(.visible) {
  opacity: 0;
  transform: translateY(20px);
}

.lesson-card.visible {
  opacity: 1;
  transform: translateY(0);
}
*/

/* Grid layout performance improvements */
.lessons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-4);
  padding: var(--space-4);
}

/* Responsive grid adjustments */
@media (max-width: 768px) {
  .lessons-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
    padding: var(--space-3);
  }
}

@media (min-width: 1200px) {
  .lessons-grid {
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--space-5);
  }
}

/* Batch processing animations */
.lesson-batch-enter {
  animation: batchFadeIn 0.6s ease-out forwards;
}

@keyframes batchFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Pagination performance */
.pagination {
  contain: layout style;
}

.pagination__btn {
  transition: all 0.15s ease;
  will-change: auto;
}

.pagination__btn:hover {
  will-change: transform, background-color;
}

/* Filter performance */
.lessons-filters {
  contain: layout style;
}

.filter-select {
  transition: border-color 0.15s ease;
}

/* Reduce reflows during filtering */
.lessons-grid.filtering {
  min-height: 400px;
}

.lessons-grid.filtering .lesson-card {
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.lessons-grid.filtering .lesson-card.hidden {
  opacity: 0;
  transform: scale(0.9);
  pointer-events: none;
}

/* Search performance improvements */
.search-input-container {
  contain: layout;
}

.search-results-highlight {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  padding: 1px 2px;
  border-radius: 2px;
}

/* Memory management for large lists */
.lesson-card.offscreen {
  visibility: hidden;
  height: 0;
  margin: 0;
  padding: 0;
}

/* Smooth scrolling optimizations */
.lessons-container {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  .lessons-container {
    scroll-behavior: auto;
  }
  
  .lesson-card--interactive:hover {
    transform: none;
  }
  
  .lesson-batch-enter {
    animation: none;
  }
}

/* Page Layouts - GitHub Style */
.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg-canvas);
}

.page__main {
  flex: 1;
  width: min(100%, var(--container-max));
  margin: 0 auto;
  padding: var(--space-8) var(--space-5) var(--space-10);
  display: flex;
  flex-direction: column;
  gap: var(--space-3xl);
}

.page--landing .page__main {
  padding-top: 0;
}

.page__header {
  text-align: center;
  margin-bottom: var(--space-8);
  padding: var(--space-6) var(--space-4);
}

.page__title {
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
  letter-spacing: -0.025em;
  line-height: var(--leading-tight);
}

.page__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: var(--leading-relaxed);
}

/* Hero Section - Enhanced French Learning Theme */
.hero {
  background: linear-gradient(135deg, var(--color-bg-canvas) 0%, var(--color-bg-secondary) 100%);
  padding: var(--space-8) 0;
  text-align: center;
  min-height: calc(100vh - var(--header-height) - 100px);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center, rgba(96, 165, 250, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero__content {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
  position: relative;
  z-index: 1;
  animation: fadeInUp 0.8s ease-out;
}

.hero__logo {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--space-6);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-normal);
  animation: heroLogoFloat 3s ease-in-out infinite;
}

.hero__logo:hover {
  transform: scale(1.1) rotate(5deg);
}

.hero__title {
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
  line-height: var(--leading-tight);
  background: linear-gradient(135deg, var(--color-text-primary), var(--color-primary));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: titleGlow 2s ease-in-out infinite alternate;
}

.hero__subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-8);
  line-height: var(--leading-relaxed);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero--split {
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  text-align: left;
  gap: var(--space-8);
  padding: var(--space-10) var(--space-4);
}

.hero--split .hero__content {
  max-width: 640px;
  margin: 0;
  padding: 0;
}

.hero--split .hero__title {
  margin: 0 0 var(--space-5) 0;
  text-align: left;
}

.hero--split .hero__subtitle {
  margin: 0 0 var(--space-6) 0;
  text-align: left;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-8);
  padding: 0;
  list-style: none;
}

.hero-stat {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.hero-stat__value {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.hero-stat__label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.hero__aside {
  width: 100%;
  max-width: 380px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-2xl);
  padding: var(--space-xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.hero-card__title {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

.hero-card__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin: 0;
}

.hero-card__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  list-style: none;
  padding: 0;
  margin: 0;
}

.hero-card__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-md);
  align-items: start;
}

.hero-card__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-weight: var(--font-semibold);
  box-shadow: var(--shadow-sm);
}

.hero-card__heading {
  font-weight: var(--font-semibold);
  margin: 0 0 var(--space-1) 0;
  color: var(--color-text-primary);
}

.hero-card__desc {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.hero-card__cta {
  align-self: flex-start;
  font-weight: var(--font-semibold);
  color: var(--color-primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.hero-card__cta:hover,
.hero-card__cta:focus {
  text-decoration: underline;
}

@media (min-width: 1024px) {
  .hero--split {
    flex-direction: row;
    align-items: stretch;
    justify-content: space-between;
    padding: var(--space-16) var(--space-8);
  }

  .hero--split .hero__content {
    padding-right: var(--space-10);
  }

  .hero__aside {
    margin: 0;
  }
}

.hero__cta {
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero__cta .btn {
  font-size: var(--text-lg);
  padding: var(--space-4) var(--space-8);
  min-height: 56px;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
}

@media (max-width: 768px) {
  .hero__cta {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
  }

  .hero__cta .btn {
    width: 100%;
  }

  .hero-card {
    padding: var(--space-lg);
  }

  .hero-card__item {
    align-items: center;
  }

  .hero-card__badge {
    width: 36px;
    height: 36px;
    font-size: var(--text-lg);
  }
}

@media (max-width: 900px) and (orientation: landscape) {
  .hero__cta {
    flex-direction: row;
    align-items: stretch;
    justify-content: center;
  }

  .hero__cta .btn {
    flex: 1 1 0;
    min-height: 48px;
    font-size: var(--text-md);
    padding: var(--space-3) var(--space-5);
  }
}

@media (max-width: 360px) {
  .hero__cta .btn {
    font-size: var(--text-base);
    padding: var(--space-3) var(--space-4);
  }
}

.hero__cta .btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
  transition: all var(--transition-normal);
  transform: translate(-50%, -50%);
  border-radius: 50%;
}

.hero__cta .btn:hover::after {
  width: 300px;
  height: 300px;
}

@media (max-width: 640px) {
  .hero--split {
    padding: var(--space-8) var(--space-3);
    gap: var(--space-6);
  }

  .hero__title {
    font-size: var(--text-3xl);
  }

  .hero__subtitle {
    font-size: var(--text-lg);
    margin-bottom: var(--space-5);
  }

  .hero__stats {
    grid-template-columns: repeat(2, minmax(140px, 1fr));
    gap: var(--space-3);
  }

  .hero-card {
    padding: var(--space-lg);
    gap: var(--space-5);
  }
}

@media (max-width: 420px) {
  .hero__stats {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: var(--space-2);
  }

  .hero-stat {
    min-width: 160px;
    scroll-snap-align: start;
  }
}

/* Enhanced Features Section */
.features {
  padding: var(--space-8) 0;
  background: var(--color-bg-primary);
  position: relative;
}

.features::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
}

.features__container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Khan Academy-inspired course map */
.solo-journey {
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
  background: var(--color-bg-elevated);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-md);
  padding: var(--space-6);
  display: grid;
  gap: var(--space-6);
}

.solo-journey__header {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.solo-journey__header h2 {
  margin: 0;
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
}

.solo-journey__header p {
  margin: var(--space-1) 0 0;
  color: var(--color-text-secondary);
  max-width: 60ch;
}

.solo-journey__meta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
}

.solo-journey__phase {
  font-size: var(--text-lg);
  color: var(--color-primary);
}

.solo-journey__weeks {
  font-size: var(--text-sm);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  background: var(--color-primary-weak);
  color: var(--color-primary);
}

.solo-journey__body {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6);
}

.solo-journey__column {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.solo-journey__subheading {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.solo-journey__list {
  margin: 0;
  padding-left: var(--space-5);
  display: grid;
  gap: var(--space-2);
  color: var(--color-text-secondary);
}

.solo-journey__sessions {
  display: grid;
  gap: var(--space-4);
}

.solo-journey__celebration {
  border-top: 1px solid var(--color-border-subtle);
  padding-top: var(--space-4);
  color: var(--color-text-secondary);
}

.solo-journey__celebration h4 {
  margin: 0 0 var(--space-2) 0;
  font-size: var(--text-md);
}

.solo-journey__empty {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  list-style: none;
}

.solo-session {
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
  background: var(--color-bg-card);
  display: grid;
  gap: var(--space-3);
}

.solo-session__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-3);
}

.solo-session__header h4 {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
}

.solo-session__duration {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  background: var(--color-border-subtle);
  border-radius: var(--radius-pill);
  padding: var(--space-1) var(--space-3);
}

.solo-session__steps {
  margin: 0;
  padding-left: var(--space-5);
  display: grid;
  gap: var(--space-2);
  color: var(--color-text-secondary);
}

@media (max-width: 1024px) {
  .solo-journey__body {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .solo-journey {
    padding: var(--space-5);
  }

  .solo-journey__body {
    grid-template-columns: 1fr;
  }
}

.solo-progress {
  display: grid;
  gap: var(--space-5);
}

.solo-progress__summary {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: var(--text-base);
  max-width: 70ch;
}

.solo-progress__meta {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
}

.solo-progress__phase {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-primary);
}

.solo-progress__weeks {
  font-size: var(--text-sm);
  background: var(--color-primary-weak);
  color: var(--color-primary);
  border-radius: var(--radius-pill);
  padding: var(--space-1) var(--space-3);
}

.solo-progress__grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.solo-progress__column {
  display: grid;
  gap: var(--space-3);
}

.solo-progress__heading {
  margin: 0;
  font-size: var(--text-md);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.solo-progress__list {
  margin: 0;
  padding-left: var(--space-5);
  display: grid;
  gap: var(--space-2);
  color: var(--color-text-secondary);
}

.solo-progress__micro {
  display: grid;
  gap: var(--space-3);
}

.solo-progress__celebration {
  border-top: 1px dashed var(--color-border-subtle);
  padding-top: var(--space-3);
  color: var(--color-text-secondary);
}

.solo-progress__celebration h4 {
  margin: 0 0 var(--space-2) 0;
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}

.solo-progress__empty {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  list-style: none;
}

@media (max-width: 640px) {
  .solo-progress__summary {
    font-size: var(--text-sm);
  }

  .solo-progress__grid {
    grid-template-columns: 1fr;
  }
}

.lessons-roadmap {
  margin-top: var(--space-8);
  background: var(--color-bg-card);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-md);
}

.lessons-roadmap__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.lessons-roadmap__header h2 {
  margin: 0;
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
}

.lessons-roadmap__header p {
  margin: var(--space-1) 0 0;
  color: var(--color-text-secondary);
  max-width: 48ch;
}

.lessons-roadmap__reset {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-2) var(--space-4);
  background: transparent;
  color: var(--color-primary);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.lessons-roadmap__reset:hover,
.lessons-roadmap__reset:focus-visible {
  background: var(--color-primary-weak);
  outline: none;
}

.lessons-roadmap__tracks {
  margin-top: var(--space-4);
  display: grid;
  gap: var(--space-4);
}

.lessons-roadmap__hint {
  margin-top: var(--space-4);
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.course-track {
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  background: var(--color-bg-elevated);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
  overflow: hidden;
}

.course-track summary {
  cursor: pointer;
  list-style: none;
  padding: var(--space-5) var(--space-6);
  outline: none;
}

.course-track summary::-webkit-details-marker {
  display: none;
}

.course-track__summary {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  align-items: center;
  flex-wrap: wrap;
}

.course-track__label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.course-track__label .material-icons {
  font-size: var(--text-2xl);
  color: var(--color-primary);
  background: var(--color-primary-weak);
  border-radius: 50%;
  padding: var(--space-2);
}

.course-track__label h3 {
  margin: 0 0 var(--space-1) 0;
  font-size: var(--text-lg);
}

.course-track__label p {
  margin: 0;
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.course-track__progress {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.track-progress {
  position: relative;
  width: 160px;
  height: 6px;
  background: var(--color-border-subtle);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.track-progress__fill {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: inherit;
}

.track-progress__value {
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
}

.course-track__body {
  padding: 0 var(--space-6) var(--space-6);
  display: grid;
  gap: var(--space-4);
}

.course-track__pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  background: var(--color-primary-weak);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.course-track__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--font-semibold);
  color: var(--color-primary);
  text-decoration: none;
}

.course-track__cta:hover,
.course-track__cta:focus-visible {
  text-decoration: underline;
  outline: none;
}

.course-track__lessons {
  display: grid;
  gap: var(--space-3);
}

.course-track__lesson {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-3);
  align-items: center;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
}

.course-track__lesson-icon {
  color: var(--color-text-tertiary);
}

.course-track__lesson-title {
  margin: 0;
  font-weight: var(--font-medium);
}

.course-track__lesson-meta {
  margin: 0;
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.course-track__lesson-link {
  color: var(--color-text-tertiary);
  display: inline-flex;
}

.course-track__reviews {
  border-top: 1px solid var(--color-border-subtle);
  padding-top: var(--space-4);
  display: grid;
  gap: var(--space-2);
}

.course-track__reviews-title {
  margin: 0;
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.course-track__reviews-list {
  display: grid;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.course-track__reviews-list a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  font-size: var(--text-sm);
  text-decoration: none;
}

.course-track__reviews-list a:hover,
.course-track__reviews-list a:focus-visible {
  text-decoration: underline;
  outline: none;
}

.course-track--recommended {
  border-color: var(--color-primary);
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.15);
}

.course-track--filtered {
  border-color: var(--color-accent);
  box-shadow: 0 10px 26px rgba(56, 189, 248, 0.15);
}

.course-track--dimmed {
  opacity: 0.55;
  filter: saturate(0.9);
}

@media (max-width: 768px) {
  .lessons-roadmap {
    padding: var(--space-5);
  }

  .lessons-roadmap__tracks {
    gap: var(--space-3);
  }

  .course-track summary {
    padding: var(--space-4);
  }

  .course-track__body {
    padding: 0 var(--space-4) var(--space-4);
  }
}

@media (max-width: 600px) {
  .lessons-roadmap {
    margin-top: var(--space-6);
    padding: var(--space-4);
  }

  .course-track__summary {
    align-items: flex-start;
  }

  .course-track__progress {
    width: 100%;
    justify-content: space-between;
  }

  .track-progress {
    flex: 1;
  }
}

/* Lesson summary overview */
.lesson-summary { 
  margin-top: var(--space-8);
  background: var(--color-bg-elevated);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  border: 1px solid var(--color-border-subtle);
  display: grid;
  gap: var(--space-6);
}

.lesson-summary-accordion {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  box-shadow: var(--shadow-md);
}

.lesson-summary-accordion:hover,
.lesson-summary-accordion[open] {
  border-color: rgba(96, 165, 250, 0.5);
  box-shadow: 0 25px 50px -30px rgba(96, 165, 250, 0.45);
}

.lesson-summary-accordion__summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-6);
  cursor: pointer;
}

.lesson-summary-accordion__summary::-webkit-details-marker {
  display: none;
}

.lesson-summary-accordion__summary:focus-visible {
  outline: 3px solid rgba(96, 165, 250, 0.65);
  outline-offset: 4px;
}

.lesson-summary-accordion__summary .material-icons {
  transition: transform 0.2s ease;
  color: rgba(191, 219, 254, 0.9);
}

.lesson-summary-accordion[open] .lesson-summary-accordion__summary .material-icons {
  transform: rotate(180deg);
}

.lesson-summary-accordion__title {
  margin: 0;
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.lesson-summary-accordion__summary-copy {
  display: grid;
  gap: var(--space-1);
}

.lesson-summary-accordion__subtitle {
  margin: 0;
  color: rgba(203, 213, 225, 0.75);
  font-size: 0.95rem;
}

.lesson-summary-accordion__content {
  padding: 0 var(--space-6) var(--space-6);
  display: grid;
  gap: var(--space-4);
}

.lesson-summary-accordion + .lesson-summary-accordion {
  margin-top: var(--space-3);
}

.lesson-summary-accordion.solo-coach {
  border-top: 1px solid rgba(148, 163, 184, 0.25);
}

.lesson-summary-accordion.solo-coach .lesson-summary-accordion__content {
  padding-bottom: var(--space-5);
}

.lesson-summary-accordion__content .lesson-summary__reflection {
  border-top: none;
  padding-top: 0;
}

@media (max-width: 720px) {
  .lesson-summary-accordion__summary {
    flex-direction: column;
    align-items: flex-start;
  }
}

.lesson-summary__intro {
  display: grid;
  gap: var(--space-2);
}

.lesson-summary__title {
  margin: 0;
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
}

.lesson-summary__subtitle {
  margin: 0;
  color: var(--color-text-secondary);
}

.lesson-summary__cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-4);
}

.lesson-summary__card {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-subtle);
  padding: var(--space-4);
  display: flex;
  gap: var(--space-3);
  box-shadow: var(--shadow-sm);
  align-items: flex-start;
}

.lesson-summary__icon {
  font-size: var(--text-2xl);
  color: var(--color-primary);
  background: var(--color-primary-weak);
  border-radius: 50%;
  padding: var(--space-2);
}

.lesson-summary__label {
  text-transform: uppercase;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
  margin: 0 0 var(--space-1) 0;
}

.lesson-summary__value {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
}

.lesson-summary__meta {
  margin: var(--space-1) 0 0;
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.lesson-summary__plan-header {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  align-items: flex-end;
  flex-wrap: wrap;
}

.lesson-summary__plan-header h3 {
  margin: 0;
  font-size: var(--text-xl);
}

.lesson-summary__plan-header p {
  margin: 0;
  color: var(--color-text-tertiary);
  max-width: 42ch;
}

.lesson-plan {
  display: grid;
  gap: var(--space-3);
  list-style: none;
  margin: 0;
  padding: 0;
}

.lesson-plan__step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  align-items: center;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
}

.lesson-plan__step--empty {
  text-align: center;
  color: var(--color-text-tertiary);
}

.lesson-plan__badge {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-semibold);
}

.lesson-plan__content {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  align-items: flex-start;
}

.lesson-plan__icon {
  color: var(--color-primary);
  font-size: var(--text-2xl);
}

.lesson-plan__title {
  margin: 0;
  font-weight: var(--font-semibold);
}

.lesson-plan__description {
  margin: var(--space-1) 0 0;
  color: var(--color-text-secondary);
}

.lesson-plan__meta {
  margin: var(--space-1) 0 0;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
}

.lesson-summary__reflection {
  border-top: 1px solid var(--color-border-subtle);
  padding-top: var(--space-4);
}

.lesson-summary__reflection h3 {
  margin: 0 0 var(--space-2) 0;
  font-size: var(--text-lg);
}

.lesson-summary__reflection p {
  margin: 0;
  color: var(--color-text-secondary);
}

.solo-coach {
  border-top: none;
  padding-top: 0;
}

.solo-coach__header h3 {
  margin: 0;
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
}

.solo-coach__header p {
  margin: var(--space-1) 0 0;
  color: var(--color-text-secondary);
  max-width: 56ch;
}

.solo-coach__body {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}

.solo-coach__card {
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  background: var(--color-bg-card);
  padding: var(--space-4);
  display: grid;
  gap: var(--space-3);
  box-shadow: var(--shadow-sm);
}

.solo-coach__card-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-3);
}

.solo-coach__card-header h4 {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
}

.solo-coach__duration {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.solo-coach__steps {
  margin: 0;
  padding-left: var(--space-5);
  display: grid;
  gap: var(--space-2);
  color: var(--color-text-secondary);
}

.solo-coach__celebration {
  border-top: 1px dashed var(--color-border-subtle);
  padding-top: var(--space-3);
  color: var(--color-text-secondary);
}

.solo-coach__celebration h5 {
  margin: 0 0 var(--space-2) 0;
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}

.solo-coach__empty {
  list-style: none;
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

@media (max-width: 720px) {
  .lesson-summary {
    padding: var(--space-5);
  }

  .lesson-plan__step {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .lesson-plan__badge {
    margin-bottom: var(--space-2);
  }

  .lesson-plan__content {
    grid-template-columns: 1fr;
  }

  .lesson-plan__icon {
    display: none;
  }
}

/* Progress learning actions */
.learning-actions {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-4);
}

.learning-actions__item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-4);
  align-items: center;
  padding: var(--space-4);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  background: var(--color-bg-card);
}

.learning-actions__icon {
  font-size: var(--text-2xl);
  color: var(--color-primary);
  background: var(--color-primary-weak);
  border-radius: 50%;
  padding: var(--space-2);
}

.learning-actions__body h3 {
  margin: var(--space-1) 0;
  font-size: var(--text-lg);
}

.learning-actions__body p {
  margin: 0;
  color: var(--color-text-secondary);
}

.learning-actions__badge {
  display: inline-flex;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  background: var(--color-primary-weak);
  color: var(--color-primary);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.learning-actions__link {
  color: var(--color-text-tertiary);
  display: inline-flex;
}

.learning-actions__empty {
  padding: var(--space-4);
  border: 1px dashed var(--color-border-subtle);
  border-radius: var(--radius-xl);
  text-align: center;
  color: var(--color-text-tertiary);
}

@media (max-width: 640px) {
  .learning-actions__item {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .learning-actions__link {
    justify-content: flex-end;
  }
}

/* Mastery grid */
.mastery-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.mastery-grid__empty {
  padding: var(--space-5);
  text-align: center;
  color: var(--color-text-tertiary);
  border: 1px dashed var(--color-border-subtle);
  border-radius: var(--radius-xl);
}

.mastery-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-subtle);
  padding: var(--space-4);
  display: grid;
  gap: var(--space-3);
  box-shadow: var(--shadow-sm);
}

.mastery-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}

.mastery-card__subtitle {
  margin: 0;
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.mastery-card__progress {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.mastery-card__bar {
  flex: 1;
  height: 6px;
  background: var(--color-border-subtle);
  border-radius: var(--radius-pill);
  overflow: hidden;
  position: relative;
}

.mastery-card__bar span {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: inherit;
}

.mastery-card__value {
  font-weight: var(--font-medium);
}

.mastery-card__hint {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.mastery-card__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  font-weight: var(--font-semibold);
  text-decoration: none;
}

.mastery-card__cta:hover,
.mastery-card__cta:focus-visible {
  text-decoration: underline;
  outline: none;
}

.mastery-card__cta--static {
  color: var(--color-text-tertiary);
}

.mastery-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--color-border-subtle);
  color: var(--color-text-secondary);
}

.mastery-chip--not-started {
  background: var(--color-surface-strong);
  color: var(--color-text-tertiary);
}

.mastery-chip--practicing {
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-primary);
}

.mastery-chip--leveling-up {
  background: rgba(56, 189, 248, 0.18);
  color: var(--color-accent);
}

.mastery-chip--mastered {
  background: rgba(16, 185, 129, 0.2);
  color: #047857;
}

.mastery-card--idle {
  border-color: var(--color-border-subtle);
}

.mastery-card--focus {
  border-color: rgba(59, 130, 246, 0.35);
  box-shadow: 0 12px 30px rgba(59, 130, 246, 0.16);
}

.mastery-card--progress {
  border-color: rgba(56, 189, 248, 0.35);
  box-shadow: 0 12px 30px rgba(56, 189, 248, 0.16);
}

.mastery-card--calm {
  border-color: rgba(16, 185, 129, 0.35);
  box-shadow: 0 12px 30px rgba(16, 185, 129, 0.16);
}

/* Grade progress enhancements */
.grade-progress__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.grade-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: var(--radius-pill);
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-strong);
  color: var(--color-text-tertiary);
}

.grade-status--not-started {
  background: var(--color-surface-strong);
  color: var(--color-text-tertiary);
}

.grade-status--practicing {
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-primary);
}

.grade-status--leveling-up {
  background: rgba(56, 189, 248, 0.18);
  color: var(--color-accent);
}

.grade-status--mastered {
  background: rgba(16, 185, 129, 0.2);
  color: #047857;
}

/* Dashboard learning flow */
.learning-flow {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.learning-flow__card {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-subtle);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  display: grid;
  gap: var(--space-3);
}

.learning-flow__header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.learning-flow__header .material-icons {
  font-size: var(--text-2xl);
  color: var(--color-primary);
  background: var(--color-primary-weak);
  border-radius: 50%;
  padding: var(--space-2);
}

.learning-flow__label {
  margin: 0;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
}

.learning-flow__title {
  margin: var(--space-1) 0 0;
  font-size: var(--text-lg);
}

.learning-flow__description {
  margin: 0;
  color: var(--color-text-secondary);
}

.learning-flow__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  font-weight: var(--font-semibold);
  text-decoration: none;
}

.learning-flow__cta:hover,
.learning-flow__cta:focus-visible {
  text-decoration: underline;
  outline: none;
}

.learning-flow__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.learning-flow__list a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  text-decoration: none;
  font-size: var(--text-sm);
}

.learning-flow__list a:hover,
.learning-flow__list a:focus-visible {
  text-decoration: underline;
  outline: none;
}

.learning-flow__empty {
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.learning-flow__progress {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.learning-flow__bar {
  flex: 1;
  height: 6px;
  background: var(--color-border-subtle);
  border-radius: var(--radius-pill);
  position: relative;
  overflow: hidden;
}

.learning-flow__bar span {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: inherit;
}

.learning-flow__progress-label {
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
}

.learning-flow__inline {
  color: var(--color-primary);
  text-decoration: none;
}

.learning-flow__inline:hover,
.learning-flow__inline:focus-visible {
  text-decoration: underline;
  outline: none;
}

@media (max-width: 640px) {
  .learning-flow__card {
    padding: var(--space-4);
  }
}

.solo-plan {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.solo-plan__card {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-subtle);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  display: grid;
  gap: var(--space-4);
}

.solo-plan__card-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
}

.solo-plan__card-header h3 {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
}

.solo-plan__weeks {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  background: var(--color-border-subtle);
  border-radius: var(--radius-pill);
  padding: var(--space-1) var(--space-3);
}

.solo-plan__subheading {
  margin: 0;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
}

.solo-plan__list {
  margin: 0;
  padding-left: var(--space-5);
  display: grid;
  gap: var(--space-2);
  color: var(--color-text-secondary);
}

.solo-plan__sessions {
  display: grid;
  gap: var(--space-3);
}

.solo-plan__session {
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  background: var(--color-bg-elevated);
  display: grid;
  gap: var(--space-3);
}

.solo-plan__session-header {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  align-items: baseline;
}

.solo-plan__session-header h4 {
  margin: 0;
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
}

.solo-plan__session-duration {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.solo-plan__steps {
  margin: 0;
  padding-left: var(--space-5);
  display: grid;
  gap: var(--space-2);
  color: var(--color-text-secondary);
}

.solo-plan__celebration {
  border-top: 1px dashed var(--color-border-subtle);
  padding-top: var(--space-3);
  color: var(--color-text-secondary);
}

.solo-plan__celebration h4 {
  margin: 0 0 var(--space-2) 0;
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}

.solo-plan__empty {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

@media (max-width: 640px) {
  .solo-plan__card {
    padding: var(--space-4);
  }
}

.features__title {
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  text-align: center;
  margin-bottom: var(--space-8);
  animation: fadeInUp 0.6s ease-out;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  animation: staggerFadeIn 0.8s ease-out 0.2s both;
}

.feature-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.feature-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-floating);
  border-color: var(--color-primary);
}

.feature-item:hover::before {
  transform: scaleX(1);
}

.feature-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.feature-desc {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

@media (max-width: 640px) {
  .features__title {
    font-size: var(--text-2xl);
  }

  .features__grid {
    gap: var(--space-4);
  }

  .feature-item {
    padding: var(--space-5);
    text-align: left;
  }
}

.journey {
  padding: var(--space-12) var(--space-4);
  background: var(--color-bg-canvas);
}

.journey__header {
  max-width: 720px;
  margin: 0 auto var(--space-10);
  text-align: center;
}

.journey__title {
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.journey__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin: 0;
}

.journey__steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

.journey-step {
  background: var(--color-bg-card);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-sm);
  padding: var(--space-xl);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.journey-step__badge {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-semibold);
  font-size: var(--text-xl);
  box-shadow: var(--shadow-md);
}

.journey-step__title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin: 0 0 var(--space-2) 0;
  color: var(--color-text-primary);
}

.journey-step__desc {
  margin: 0 0 var(--space-3) 0;
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.journey-step__link {
  font-weight: var(--font-semibold);
  color: var(--color-primary);
  text-decoration: none;
}

.journey-step__link:hover,
.journey-step__link:focus {
  text-decoration: underline;
}

@media (max-width: 600px) {
  .journey {
    padding: var(--space-10) var(--space-3);
  }

  .journey__header {
    margin-bottom: var(--space-8);
  }

  .journey__title {
    font-size: var(--text-2xl);
  }

  .journey__subtitle {
    font-size: var(--text-base);
  }

  .journey-step {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    padding: var(--space-lg);
  }

  .journey-step__badge {
    justify-self: start;
  }
}

@media (min-width: 1024px) {
  .journey__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    max-width: none;
  }

  .journey-step {
    grid-template-columns: 1fr;
    height: 100%;
  }

  .journey-step__badge {
    justify-self: start;
  }
}

.skill-tracks {
  padding: var(--space-12) var(--space-4);
  background: var(--color-bg-secondary);
}

.skill-tracks__header {
  max-width: 720px;
  margin: 0 auto var(--space-10);
  text-align: center;
}

.skill-tracks__title {
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.skill-tracks__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin: 0;
}

.skill-tracks__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-6);
}

.skill-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-2xl);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.skill-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.skill-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.skill-card__icon {
  font-size: 2rem;
}

.skill-card__title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin: 0;
  color: var(--color-text-primary);
}

.skill-card__desc {
  margin: 0;
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.skill-card__link {
  color: var(--color-primary);
  font-weight: var(--font-semibold);
  text-decoration: none;
}

.skill-card__link:hover,
.skill-card__link:focus {
  text-decoration: underline;
}

.practice-planner {
  padding: var(--space-12) var(--space-4) var(--space-16);
  background: var(--color-bg-canvas);
}

.practice-planner__content {
  max-width: 960px;
  margin: 0 auto;
  background: var(--color-bg-card);
  border-radius: var(--radius-3xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-lg);
  padding: var(--space-12) var(--space-10);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.practice-planner__intro {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.practice-planner__title {
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  margin: 0;
  color: var(--color-text-primary);
}

.practice-planner__subtitle {
  margin: 0;
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
}

.practice-planner__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-6);
}

.practice-card {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-2xl);
  padding: var(--space-lg);
  text-align: left;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-subtle);
}

.practice-card__day {
  font-weight: var(--font-semibold);
  margin: 0 0 var(--space-2) 0;
  color: var(--color-text-primary);
}

.practice-card__focus {
  margin: 0;
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.practice-planner__cta {
  align-self: center;
  color: var(--color-primary);
  font-weight: var(--font-semibold);
  text-decoration: none;
}

.practice-planner__cta:hover,
.practice-planner__cta:focus {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .practice-planner {
    padding: var(--space-10) var(--space-3) var(--space-12);
  }

  .practice-planner__content {
    padding: var(--space-8) var(--space-6);
  }

  .practice-planner__title {
    font-size: var(--text-2xl);
  }

  .practice-planner__subtitle {
    font-size: var(--text-base);
  }

  .practice-planner__grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .practice-card {
    padding: var(--space-5);
  }

  .practice-planner__cta {
    width: 100%;
    text-align: center;
  }
}

/* Animation Keyframes */
@keyframes heroLogoFloat {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes titleGlow {
  0% {
    text-shadow: 0 0 5px rgba(96, 165, 250, 0.3);
  }
  100% {
    text-shadow: 0 0 20px rgba(96, 165, 250, 0.6);
  }
}

@keyframes staggerFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive enhancements */
@media (max-width: 768px) {
  .hero__title {
    font-size: var(--text-4xl);
  }
  
  .hero__subtitle {
    font-size: var(--text-lg);
  }
  
  .hero__logo {
    width: 100px;
    height: 100px;
  }
  
  .features__grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

.hero__logo {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-4);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

.hero__logo:hover {
  transform: scale(1.05);
}

.hero__title {
  font-size: var(--text-5xl);
  font-weight: var(--font-light);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  line-height: var(--leading-tight);
  letter-spacing: -0.025em;
}

.hero__subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  line-height: var(--leading-relaxed);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.hero__cta {
  margin-top: var(--space-6);
}

.hero__cta {
  margin-top: var(--space-xl);
}

/* Grid Layouts - Mobile-First Responsive */
.grades-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  padding: var(--space-lg);
  max-width: var(--container-max);
  margin: 0 auto;
}

/* Tablet responsive grid */
@media (min-width: 768px) {
  .grades-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
    padding: var(--space-xl);
  }
}

/* Desktop responsive grid */
@media (min-width: 1024px) {
  .grades-grid {
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-xl);
    padding: var(--space-2xl);
  }
}

.lessons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  padding: var(--space-xl) var(--space-lg);
  max-width: var(--container-max);
  margin: 0 auto;
}

/* Dashboard Layout */
.dashboard {
  padding: var(--space-xl) var(--space-lg);
  max-width: var(--container-max);
  margin: 0 auto;
}

.dashboard-page {
  padding: 0;
  max-width: var(--container-max);
  margin: 0 auto;
  min-height: calc(100vh - var(--header-height));
}

.dashboard-page .dark-content {
  padding: var(--space-3xl);
}

.dashboard-page .dark-content .dashboard {
  padding: 0;
}

.dashboard__section,
.dashboard-section {
  margin-bottom: var(--space-3xl);
}

.dashboard__section-header,
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.dashboard__section-title,
.dashboard-section h2 {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-xl);
}

.dashboard-accordion {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(148, 163, 184, 0.15);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  overflow: hidden;
}

.dashboard-accordion:hover,
.dashboard-accordion[open] {
  border-color: rgba(59, 130, 246, 0.6);
  box-shadow: 0 30px 60px -35px rgba(59, 130, 246, 0.5);
}

.dashboard-accordion__summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-xl) var(--space-2xl);
  cursor: pointer;
}

.dashboard-accordion__summary::-webkit-details-marker {
  display: none;
}

.dashboard-accordion__summary:focus-visible {
  outline: 3px solid rgba(59, 130, 246, 0.6);
  outline-offset: 4px;
}

.dashboard-accordion__summary--stacked {
  align-items: flex-start;
}

.dashboard-accordion__summary-copy {
  display: grid;
  gap: var(--space-xs);
}

.dashboard-accordion__title {
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  font-weight: var(--font-semibold);
  margin: 0;
  color: var(--color-text-primary);
}

.dashboard-accordion__subtitle {
  margin: 0;
  color: rgba(226, 232, 240, 0.75);
  font-size: 0.95rem;
}

.dashboard-accordion__summary .material-icons {
  transition: transform 0.2s ease;
  color: rgba(148, 163, 184, 0.9);
}

.dashboard-accordion[open] .dashboard-accordion__summary .material-icons {
  transform: rotate(180deg);
}

.dashboard-accordion__content {
  padding: 0 var(--space-2xl) var(--space-2xl);
  display: grid;
  gap: var(--space-xl);
  max-width: 100%;
  overflow-wrap: anywhere;
}

.dashboard-accordion__actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-md);
}

@media (max-width: 900px) {
  .dashboard-accordion__summary {
    padding: var(--space-lg) var(--space-xl);
  }
}

@media (max-width: 720px) {
  .dashboard-accordion__summary {
    flex-direction: column;
    align-items: flex-start;
  }

  .dashboard-accordion__actions {
    justify-content: flex-start;
  }
}

@media (max-width: 540px) {
  .dashboard-accordion__summary {
    padding: var(--space-lg) var(--space-lg);
  }

  .dashboard-accordion__actions {
    width: 100%;
    flex-wrap: wrap;
    gap: var(--space-3);
  }

  .dashboard-accordion__actions .btn,
  .dashboard-accordion__actions .grade-accordion__cta,
  .dashboard-accordion__actions a {
    width: 100%;
    justify-content: center;
  }
}

/* Welcome Banner */
.welcome-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-text-inverse);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-2xl);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.welcome-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.1) 50%, transparent 70%);
  animation: shimmer 3s infinite;
}

.welcome-banner__content {
  flex: 1;
  z-index: 1;
  position: relative;
}

.welcome-banner__emoji {
  font-size: 3rem;
  margin-bottom: var(--space-sm);
  animation: bounce 2s infinite;
}

.welcome-banner__title {
  margin: 0 0 var(--space-sm) 0;
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-text-inverse);
}

.welcome-banner__subtitle {
  margin: 0;
  font-size: var(--text-base);
  opacity: 0.9;
  color: var(--color-text-inverse);
}

.welcome-banner__streak {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(255, 255, 255, 0.2);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  z-index: 1;
  position: relative;
}

.welcome-banner__streak .material-icons {
  color: var(--color-warning);
}
  font-size: var(--text-xl);
}

.streak-indicator span:last-child {
  font-weight: var(--font-semibold);
  color: white;
}

/* Overview Cards */
.overview-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.overview-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.overview-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #3b82f6, #1d4ed8);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.overview-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-interactive);
}

.overview-card:hover::before {
  opacity: 1;
}

.overview-card .card-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.overview-card .card-icon .material-icons {
  color: white;
  font-size: var(--text-2xl);
}

.overview-card .card-content {
  flex: 1;
  min-width: 0;
}

.overview-card .card-number {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.overview-card .card-label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Goals and Achievements Section */
.goals-achievements-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.daily-goals-card,
.recent-achievements-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-sm);
}

.daily-goals-card h3,
.recent-achievements-card h3 {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin: 0 0 var(--space-lg) 0;
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.daily-goals-card h3 .material-icons,
.recent-achievements-card h3 .material-icons {
  color: var(--color-primary);
  font-size: var(--text-xl);
}

.daily-goals,
.recent-achievements {
  min-height: 120px;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* Goal Item Styling - Essential for Dashboard Contrast */
.goal-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--color-bg-interactive);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-muted);
  transition: all var(--transition-fast);
}

.goal-item.completed {
  background: var(--color-bg-success);
  border-color: var(--color-success);
}

.goal-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.goal-icon .material-icons {
  color: var(--color-text-inverse);
  font-size: var(--text-lg);
}

.goal-item.completed .goal-icon {
  background: linear-gradient(135deg, var(--color-success), var(--color-success-light));
}

.goal-content {
  flex: 1;
  min-width: 0;
}

.goal-content h4 {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-xs) 0;
}

.goal-content p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-sm) 0;
}

.goal-progress {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.goal-progress-bar {
  flex: 1;
  height: 6px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.goal-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}

.goal-item.completed .goal-progress-fill {
  background: linear-gradient(90deg, var(--color-success), var(--color-success-light));
}

.goal-progress-text {
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  min-width: 35px;
  text-align: right;
}

/* Achievement Item Styling - Essential for Dashboard Contrast */
.achievement-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--color-bg-interactive);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-muted);
  transition: all var(--transition-fast);
}

.achievement-badge {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-warning), #f59e0b);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.achievement-badge .material-icons {
  color: var(--color-text-inverse);
  font-size: var(--text-lg);
}

.achievement-info {
  flex: 1;
  min-width: 0;
}

.achievement-info h4 {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-xs) 0;
}

.achievement-info p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

.achievement-time {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: var(--font-medium);
}

/* Empty State Message Styling - Fixes Contrast Issues */
.empty-state-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  text-align: center;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  border: 2px dashed var(--color-border-muted);
}

.empty-state-message .material-icons {
  font-size: 2rem !important;
  color: var(--color-text-muted) !important;
  margin-bottom: var(--space-sm) !important;
  opacity: 0.7;
}

.empty-state-message p {
  font-size: var(--text-sm) !important;
  color: var(--color-text-secondary) !important;
  margin: 0 !important;
  font-weight: var(--font-medium);
}

/* Children Progress Section */
.children-progress {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-xl);
}

.child-progress-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.child-progress-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Quick Actions Section */
.quick-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.action-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 2px solid var(--color-border-default);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: inherit;
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.action-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #3b82f6, #1d4ed8);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.action-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: #3b82f6;
  text-decoration: none;
  color: inherit;
}

.action-card:hover::before {
  opacity: 1;
}

.action-card .action-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.action-card .action-icon .material-icons {
  color: white;
  font-size: var(--text-2xl);
}

.action-card .action-content {
  flex: 1;
  min-width: 0;
}

.action-card .action-content h3 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-xs) 0;
}

.action-card .action-content p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.4;
}

@media (max-width: 640px) {
  .quick-actions {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .action-card {
    padding: var(--space-lg);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .action-card .action-icon {
    width: 48px;
    height: 48px;
  }
}

/* Animations */
@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

/* SIMPLIFIED Activities Layout - Reduced Visual Clutter */
.activity {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-lg);
  /* Removed excessive padding that created extra visual space */
}

.activity__header {
  text-align: center;
  margin-bottom: var(--space-xl);
  padding: var(--space-lg);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  /* Reduced padding and added simple border instead of complex styling */
}

.activity__title {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
}

.activity__progress {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.activity__progress-text {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
}

.activity__progress-bar {
  width: 200px;
  height: 6px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.activity__progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width var(--transition-normal);
}

.activity__content {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  margin-bottom: var(--space-xl);
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.activity__navigation {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

/* Loading States */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl);
}

.loading__spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border-light);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeIn 0.5s ease-out;
}

/* Focus Management */
.focus-trap {
  position: relative;
}

.focus-trap:focus-within {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-md);
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --color-border-light: var(--color-text-primary);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.8);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.8);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .page__main {
    width: 100%;
    padding: var(--space-6) var(--space-4) var(--space-10);
    gap: var(--space-2xl);
  }
  
  .page__title {
    font-size: var(--text-3xl);
  }
  
  .hero {
    padding: var(--space-xl) var(--space-md);
  }
  
  .hero__title {
    font-size: var(--text-4xl);
  }
  
  .hero__logo {
    width: 100px;
    height: 100px;
  }
  
  .grades-grid,
  .lessons-grid {
    grid-template-columns: 1fr;
    padding: 0 var(--space-md);
    gap: var(--space-md);
  }
  
  .dashboard,
  .dashboard-page {
    padding: var(--space-lg) var(--space-md);
  }
  
  .welcome-banner {
    flex-direction: column;
    text-align: center;
    gap: var(--space-lg);
    padding: var(--space-xl);
  }
  
  .welcome-banner h2 {
    font-size: var(--text-xl);
  }
  
  .streak-indicator {
    padding: var(--space-md);
  }
  
  .overview-cards {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  
  .goals-achievements-container {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .children-progress {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .quick-actions {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  
  .action-card {
    padding: var(--space-lg);
    flex-direction: column;
    text-align: center;
    gap: var(--space-md);
  }
  
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }
  
  .dashboard__section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .activity {
    padding: var(--space-lg) var(--space-md);
  }
  
  .activity__header {
    padding: var(--space-lg);
  }
  
  .activity__title {
    font-size: var(--text-2xl);
  }
  
  .activity__content {
    padding: var(--space-xl);
    min-height: 300px;
  }
  
  .activity__navigation {
    flex-direction: column;
  }
  
  .activity__progress-bar {
    width: 150px;
  }
}

@media (max-width: 480px) {
  .header__container {
    padding: 0 var(--space-4);
  }

  .header__title {
    font-size: var(--text-lg);
  }

  .btn,
  .btn--primary,
  .btn--secondary,
  .btn-outline-primary {
    width: 100%;
    justify-content: center;
  }

  .hero {
    padding: var(--space-6) var(--space-3);
    min-height: auto;
  }

  .hero__title {
    font-size: var(--text-3xl);
  }

  .hero__subtitle {
    font-size: var(--text-base);
  }

  .page__title {
    font-size: var(--text-2xl);
  }
  
  .activity__header {
    padding: var(--space-md);
  }
  
  .activity__content {
    padding: var(--space-lg);
  }
}

/* Features Section - Clean Professional Design */
.features {
  background: var(--color-bg-canvas);
  padding: var(--space-3xl) 0;
}

.features__container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.features__title {
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  text-align: center;
  margin-bottom: var(--space-3xl);
  line-height: var(--leading-tight);
  letter-spacing: -0.025em;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-2xl);
  margin-top: var(--space-3xl);
}

.feature-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  text-align: left;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.feature-item:hover {
  border-color: var(--color-border-interactive);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.feature-item:hover::before {
  transform: scaleX(1);
}

.feature-title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
  line-height: var(--leading-tight);
}

.feature-desc {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin: 0;
}

/* Mobile responsive adjustments */
@media (max-width: 768px) {
  .features {
    padding: var(--space-2xl) 0;
  }
  
  .features__container {
    padding: 0 var(--space-md);
  }
  
  .features__title {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-2xl);
  }
  
  .features__grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    margin-top: var(--space-2xl);
  }
  
  .feature-item {
    padding: var(--space-xl);
  }
  
  .feature-title {
    font-size: var(--text-lg);
  }
}

@media (max-width: 480px) {
  .features__title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-xl);
  }
  
  .feature-item {
    padding: var(--space-lg);
  }
}

/* ===== MCQ ACTIVITY CONTRAST FIX ===== */

/* Fix MCQ option contrast for dark theme - ensure readability */
.mcq-activity .mcq-option,
.activity-mcq .mcq-option,
.mcq-option {
  background: #252b3a !important; /* Dark theme background */
  color: #f8fafc !important; /* Light text for readability */
  border: 2px solid #4b5563 !important; /* Visible border */
}

.mcq-activity .mcq-option:hover,
.activity-mcq .mcq-option:hover,
.mcq-option:hover {
  background: #3a4251 !important; /* Lighter on hover */
  border-color: #60a5fa !important; /* Blue border on hover */
}

.mcq-activity .mcq-option.selected,
.activity-mcq .mcq-option.selected,
.mcq-option.selected {
  background: #1e3a8a !important; /* Selected state */
  border-color: #3b82f6 !important; /* Primary blue border */
  color: #ffffff !important; /* Ensure high contrast text */
}

/* ===== UNIFIED DARK THEME FOR ALL PAGES ===== */

/* Base dark theme page styles - applies to all major pages */
.dark-page {
  min-height: calc(100vh - var(--header-height));
  background: var(--color-bg-canvas);
  width: min(100%, var(--container-max));
  margin: 0 auto;
  padding: var(--space-8) var(--space-5) var(--space-12);
  display: flex;
  flex-direction: column;
  gap: var(--space-3xl);
}

.dark-container {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  max-width: var(--container-max);
  margin: 0 auto;
}

.dark-header {
  padding: var(--space-3xl) var(--space-3xl) var(--space-xl);
  text-align: center;
  background: var(--color-bg-tertiary);
  border-bottom: 1px solid var(--color-border-default);
  position: relative;
}

.dark-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.dark-header h1 {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-md) 0;
}

.dark-header p {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin: 0;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: var(--leading-relaxed);
}

.dark-content {
  padding: var(--space-3xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.content-simple {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.simple-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-xl);
}

.simple-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  height: 100%;
}

.simple-cta {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  align-items: flex-start;
}

.app-info-section {
  display: grid;
  gap: var(--space-md);
  align-items: flex-start;
}

.app-info-actions {
  display: grid;
  gap: var(--space-sm);
  width: 100%;
  max-width: 360px;
}

.app-info-actions .btn {
  width: 100%;
}

@media (min-width: 640px) {
  .app-info-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.app-info-hint {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.version-info {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-secondary);
}

.version-text {
  color: inherit;
}

/* Landing Page Hero - Enhanced with Dark Theme */
.hero.dark-hero {
  background: var(--color-bg-canvas);
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl) var(--space-md);
}

.hero__content.dark-hero-content {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-floating);
  padding: var(--space-4xl) var(--space-3xl);
  max-width: 800px;
  text-align: center;
}

.hero__title.dark-title {
  color: var(--color-text-primary);
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-lg);
}

.hero__subtitle.dark-subtitle {
  color: var(--color-text-secondary);
  font-size: var(--text-xl);
  margin-bottom: var(--space-2xl);
  line-height: var(--leading-relaxed);
}

/* Grades Page - Enhanced List Styling */
.grade-card.dark-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.grade-card.dark-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.grade-card.dark-card:active {
  transform: translateY(0);
  transition-duration: 0.1s;
}

/* Lessons Page - Enhanced Lesson Cards */
.lesson-card.dark-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-interactive);
  transition: var(--transition-normal);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.lesson-card.dark-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-interactive);
}

/* Activity Container - Enhanced for Lesson Page */
.activity-container.dark-activity {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-interactive);
  padding: var(--space-xl);
  margin: var(--space-lg) auto;
  max-width: 900px;
}

/* Dashboard Cards - Enhanced */
.dashboard-card.dark-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-interactive);
  transition: var(--transition-normal);
}

.dashboard-card.dark-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-interactive);
}

/* Feature Cards - Enhanced for About/Other Pages */
.feature-card.dark-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-interactive);
  padding: var(--space-xl);
  transition: var(--transition-normal);
}

.feature-card.dark-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-interactive);
}

/* Mobile Responsiveness for Dark Theme */
@media (max-width: 768px) {
  .dark-page {
    width: 100%;
    padding: var(--space-6) var(--space-4) var(--space-10);
    gap: var(--space-2xl);
  }
  
  .dark-container {
    margin: 0;
    border-radius: var(--radius-xl);
  }
  
  .dark-header {
    padding: var(--space-xl) var(--space-lg) var(--space-lg);
  }
  
  .dark-header h1 {
    font-size: var(--text-3xl);
  }

  .dark-content {
    padding: var(--space-2xl) var(--space-xl);
    gap: var(--space-xl);
  }

  .content-simple {
    gap: var(--space-xl);
  }

  .app-info-section {
    flex-direction: column;
    align-items: stretch;
  }

  .simple-cta {
    align-items: stretch;
  }

  .hero__content.dark-hero-content {
    padding: var(--space-3xl) var(--space-xl);
    margin: 0 var(--space-sm);
  }
  
  .hero__title.dark-title {
    font-size: var(--text-3xl);
  }
}

/* Family Setup, Settings, and Debug pages share the same dark layout */
.family-setup-page,
.settings-page,
.debug-progress-page {
  padding: var(--space-4xl) var(--space-md);
  background: var(--color-bg-canvas);
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.family-setup-page .dark-container,
.settings-page .dark-container,
.debug-progress-page .dark-container {
  width: 100%;
  max-width: 1080px;
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-lg);
}

.page-header {
  padding: var(--space-3xl) var(--space-3xl) var(--space-xl);
  text-align: center;
  border-bottom: 1px solid var(--color-border-default);
  background: var(--color-bg-tertiary);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  position: relative;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.page-title {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  margin: 0;
}

.page-description {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin: 0 auto;
  max-width: 700px;
  line-height: var(--leading-relaxed);
}

.page-content {
  padding: var(--space-3xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.family-setup-page .page-content,
.settings-page .page-content,
.debug-progress-page .page-content {
  background: transparent;
}

.family-setup-page .content-card,
.settings-page .content-card,
.debug-progress-page .content-card {
  margin: 0;
  max-width: 100%;
}

@media (max-width: 768px) {
  .family-setup-page,
  .settings-page,
  .debug-progress-page {
    padding: var(--space-3xl) var(--space-sm);
  }

  .page-header {
    padding: var(--space-2xl) var(--space-xl) var(--space-lg);
  }

  .page-title {
    font-size: var(--text-3xl);
  }

  .page-description {
    font-size: var(--text-base);
  }

  .page-content {
    padding: var(--space-2xl) var(--space-lg);
  }
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.section-header h2 {
  margin: 0;
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

/* Enhanced Form Styling */
.form-group {
  margin-bottom: 2rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.75rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  font-size: 1.1rem;
}

.form-input {
  width: 100%;
  padding: 1rem 1.25rem;
  border: 2px solid var(--color-border-default);
  border-radius: 1rem;
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  font-size: 1rem;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-border-interactive);
  box-shadow: var(--shadow-focus);
  transform: translateY(-2px);
}

/* Family Setup Page Styles */
.content-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-card);
  padding: var(--space-3xl);
  margin: var(--space-xl) auto;
  max-width: 900px;
  color: var(--color-text-primary);
}

.content-card__header {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.content-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.form-section {
  margin-bottom: var(--space-3xl);
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid var(--color-border-muted);
}

.form-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.section-title {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.section-subtitle {
  margin: 0;
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.form-field {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
  font-size: var(--text-base);
}

.form-helper {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

.toggle-control {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-md);
  align-items: center;
  padding: var(--space-md);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-default);
  background: var(--color-bg-interactive);
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  position: relative;
}

.toggle-control:hover {
  border-color: var(--color-border-interactive);
  box-shadow: var(--shadow-sm);
}

.toggle-control input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.toggle-control__indicator {
  width: 44px;
  height: 24px;
  border-radius: 999px;
  background: var(--color-border-muted);
  position: relative;
  transition: background var(--transition-fast);
  box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.25);
}

.toggle-control__indicator::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-bg-card);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.toggle-control input:checked + .toggle-control__indicator {
  background: var(--color-primary);
}

.toggle-control input:checked + .toggle-control__indicator::after {
  transform: translateX(20px);
  background: var(--color-primary-light);
}

.toggle-control input:focus-visible + .toggle-control__indicator {
  outline: 2px solid var(--color-border-interactive);
  outline-offset: 2px;
}

.toggle-control__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.toggle-control__title {
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.toggle-control__description {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.settings-summary {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-default);
  background: var(--color-bg-subtle);
  margin-top: var(--space-md);
  line-height: var(--leading-relaxed);
}

.settings-summary .material-icons {
  color: var(--color-primary);
}

.reminder-settings {
  margin-top: var(--space-lg);
  padding: var(--space-lg);
  border-radius: var(--radius-xl);
  border: 1px dashed var(--color-border-muted);
  background: var(--color-bg-subtle);
  display: grid;
  gap: var(--space-lg);
}

.reminder-settings.is-disabled {
  opacity: 0.6;
  pointer-events: none;
}

.reminder-grid {
  display: grid;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .reminder-grid {
    grid-template-columns: 2fr 1fr;
  }
}

.day-selector {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(88px, 1fr));
  gap: var(--space-sm);
}

.day-option {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-default);
  background: var(--color-bg-card);
  color: var(--color-text-secondary);
  padding: var(--space-sm) var(--space-md);
  text-align: center;
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}

.day-option input {
  position: absolute;
  opacity: 0;
  inset: 0;
  cursor: pointer;
}

.day-option span {
  pointer-events: none;
}

.day-option:hover {
  border-color: var(--color-border-interactive);
}

.day-option input:checked + span {
  color: var(--color-text-inverse);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: var(--radius-md);
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
}

.form-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-lg);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-border-muted);
  flex-wrap: wrap;
}

/* Enhanced Children List */
.children-list {
  min-height: 200px;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-4xl);
  text-align: center;
  color: var(--color-text-tertiary);
  border: 2px dashed var(--color-border-muted);
  border-radius: var(--radius-xl);
  background: var(--color-bg-tertiary);
}

.empty-state .material-icons {
  font-size: 4rem;
  margin-bottom: var(--space-lg);
  color: var(--color-text-muted);
}

.empty-state p {
  font-size: var(--text-lg);
  margin: var(--space-sm) 0;
  color: var(--color-text-secondary);
}

.empty-state p.muted {
  font-size: var(--text-base);
  color: var(--color-text-muted);
}

.child-card {
  background: var(--color-bg-interactive);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.child-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border-interactive);
}

.child-avatar {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-inverse);
  font-size: 2rem;
  box-shadow: var(--shadow-md);
  flex-shrink: 0;
}

.child-info {
  flex: 1;
}

.child-info h3 {
  margin: 0 0 var(--space-sm) 0;
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.child-info p {
  margin: var(--space-xs) 0;
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.child-info .material-icons {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
}

.child-actions {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.children-list:empty {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-xl);
  border: 2px dashed var(--color-border-muted);
  padding: var(--space-4xl);
  text-align: center;
}

.children-list:empty::before {
  content: '👨‍👩‍👧‍👦\a\a Aucun enfant ajouté \a\a Click "Add Child" to get started';
  white-space: pre-line;
  color: var(--color-text-muted);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
}

.child-card {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-xl);
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-default);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.child-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.child-card:hover {
  border-color: var(--color-border-interactive);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.child-card:hover::before {
  transform: scaleX(1);
}

.child-avatar {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-inverse);
  font-size: 2rem;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
  flex-shrink: 0;
}

.child-info {
  flex: 1;
}

.child-info h3 {
  margin: 0 0 0.5rem 0;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.child-info p {
  margin: 0.25rem 0;
  font-size: 1rem;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.child-info .material-icons {
  font-size: 1.2rem;
  color: var(--color-text-muted);
}

.child-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.btn-icon {
  width: 45px;
  height: 45px;
  border: 1px solid var(--color-border-muted);
  background: var(--color-bg-interactive);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  color: var(--color-text-muted);
  box-shadow: var(--shadow-sm);
}

.btn-icon:hover {
  background: var(--color-bg-tertiary);
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
  color: var(--color-text-primary);
}

@media (max-width: 768px) {
  .dark-content {
    padding: var(--space-6);
  }

  .form-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .form-actions .btn,
  .form-actions .btn--secondary,
  .form-actions .btn--primary {
    width: 100%;
    justify-content: center;
  }

  .child-card {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-4);
    padding: var(--space-lg);
  }

  .child-avatar {
    width: 56px;
    height: 56px;
    font-size: 1.75rem;
  }

  .child-actions {
    width: 100%;
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: var(--space-3);
  }

  .child-actions .btn {
    flex: 1 1 160px;
    justify-content: center;
  }

  .child-actions .btn-icon {
    flex: 0 0 48px;
  }
}

@media (max-width: 480px) {
  .content-card {
    padding: var(--space-6);
  }

  .child-info h3 {
    font-size: var(--text-lg);
  }

  .child-actions .btn-icon {
    flex: 0 0 44px;
  }

  .child-actions .btn {
    flex-basis: 100%;
  }
}

.btn-icon.danger {
  color: var(--color-error);
  border-color: var(--color-border-error);
}

.btn-icon.danger:hover {
  background: var(--color-error-bg);
  color: var(--color-error-light);
}

.btn.small {
  padding: 0.75rem 1.5rem;
  font-size: 0.9rem;
  border-radius: 0.75rem;
}

/* Enhanced Setup Actions */
.setup-actions {
  display: flex;
  gap: var(--space-xl);
  justify-content: center;
  padding: var(--space-3xl) var(--space-4xl) var(--space-xl);
  border-top: 1px solid var(--color-border-muted);
  margin-top: var(--space-2xl);
  flex-wrap: wrap;
}

.setup-actions .btn {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--text-lg);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  min-width: 180px;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.setup-actions .btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.setup-actions .btn.primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border: none;
  color: var(--color-text-inverse);
}

.setup-actions .btn:not(.primary) {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  color: var(--color-text-primary);
}

/* Enhanced Empty State - Dark Theme Consistent */
.empty-state {
  text-align: center;
  padding: var(--space-4xl);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-xl);
  border: 2px dashed var(--color-border-muted);
  color: var(--color-text-secondary);
  transition: all var(--transition-normal);
}

.empty-state:hover {
  border-color: var(--color-border-interactive);
  background: var(--color-bg-interactive);
}

.empty-state .material-icons {
  font-size: 3rem;
  margin-bottom: var(--space-lg);
  opacity: 0.7;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.empty-state h3 {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

.empty-state p {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  margin: 0 0 var(--space-lg) 0;
  color: var(--color-text-secondary);
}

/* Enhanced Modal Styles - Dark Theme */
.modal, .modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.modal.active, .modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--color-bg-card);
  border-radius: 1.5rem;
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  overflow: auto;
  box-shadow: var(--shadow-xl);
  transform: scale(0.9);
  transition: transform 0.3s ease;
  border: 1px solid var(--color-border-default);
}

.modal.active .modal-content {
  transform: scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem 2rem 1rem;
  border-bottom: 1px solid var(--color-border-default);
  position: relative;
}

.modal-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: 1.5rem 1.5rem 0 0;
}

.modal-header h3 {
  margin: 0;
  color: var(--color-text-primary);
  font-size: 1.5rem;
  font-weight: 600;
}

.modal-header .icon-btn {
  background: var(--color-bg-interactive);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  color: var(--color-text-secondary);
}

.modal-header .icon-btn:hover {
  background: var(--color-bg-tertiary);
  transform: scale(1.1);
}

.modal-body {
  padding: 2rem;
  color: var(--color-text-primary);
}

.modal-footer {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
  padding: 1rem 2rem 2rem;
  border-top: 1px solid var(--color-border-default);
}

.modal-footer .btn {
  padding: 0.75rem 1.5rem;
  border-radius: 0.75rem;
  font-weight: 500;
  transition: all 0.3s ease;
  min-width: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-footer .btn.primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border: none;
  color: var(--color-text-inverse);
}

.modal-footer .btn:not(.primary) {
  background: var(--color-bg-interactive);
  border: 2px solid var(--color-border-default);
  color: var(--color-text-primary);
}

.modal-footer .btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Welcome Page Styles - Dark Theme */
.welcome-page {
  min-height: calc(100vh - var(--header-height));
  padding: var(--space-3xl) var(--space-md);
  background: var(--color-bg-canvas);
  display: flex;
  align-items: stretch;
  justify-content: center;
}

.welcome-container {
  max-width: 960px;
  width: 100%;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-card);
  padding: var(--space-3xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-3xl);
}

/* Enhanced Step Indicator */
.step-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-lg) var(--space-xl);
  border-radius: var(--radius-xl);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-muted);
  position: relative;
  overflow: hidden;
}

.step-indicator::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(59, 130, 246, 0.18) 0%, rgba(30, 64, 175, 0.18) 100%);
  pointer-events: none;
}

.step {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex: 1;
  opacity: 0.5;
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.step.active {
  opacity: 1;
}

.step.completed {
  opacity: 0.85;
}

.step-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-bg-subtle);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.step.active .step-number {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-text-inverse);
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

.step.completed .step-number {
  background: linear-gradient(135deg, var(--color-success, #10b981) 0%, #059669 100%);
  color: var(--color-text-inverse);
}

.step-label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.step.active .step-label {
  color: var(--color-text-primary);
}

/* Welcome Steps */
.welcome-step {
  display: none;
  padding: var(--space-3xl) var(--space-2xl);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-muted);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-card);
}

.welcome-step.active {
  display: block;
}

.step-content h1 {
  font-size: var(--text-3xl);
  margin: 0 0 var(--space-lg) 0;
  color: var(--color-text-primary);
  text-align: center;
}

.step-content p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  text-align: center;
  margin: 0 0 var(--space-2xl) 0;
  line-height: var(--leading-relaxed);
}

.step-content {
  text-align: center;
  padding: var(--space-xl) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

/* Enhanced User Type Cards */
.user-type-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
  margin: var(--space-2xl) 0;
}

.user-type-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.user-type-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.user-type-card:hover {
  border-color: var(--color-border-interactive);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.user-type-card:hover::before,
.user-type-card.selected::before {
  transform: scaleX(1);
}

.user-type-card.selected {
  border-color: var(--color-border-interactive);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.18) 0%, rgba(30, 64, 175, 0.18) 100%);
}

.user-type-card .card-icon {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-lg);
  color: var(--color-primary-light);
}

.user-type-card h3 {
  font-size: var(--text-xl);
  margin: 0 0 var(--space-sm) 0;
  color: var(--color-text-primary);
  font-weight: var(--font-semibold);
}

.user-type-card p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin: 0;
  line-height: var(--leading-relaxed);
}

/* Enhanced Form Styles */
.setup-form {
  max-width: 520px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--space-xl);
  text-align: left;
}

.form-group label {
  display: block;
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
  font-size: var(--text-base);
}

.form-group input,
.form-group select,
.form-select,
.form-input {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  background: var(--color-bg-interactive);
  color: var(--color-text-primary);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.form-group input:focus,
.form-group select:focus,
.form-select:focus,
.form-input:focus {
  outline: none;
  border-color: var(--color-border-interactive);
  box-shadow: var(--shadow-focus);
  transform: translateY(-2px);
}

/* Enhanced Navigation */
.welcome-navigation {
  display: flex;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-muted);
  border-radius: var(--radius-2xl);
  gap: var(--space-lg);
}

.welcome-navigation .btn {
  min-width: 120px;
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-lg);
  font-weight: var(--font-medium);
  transition: all var(--transition-normal);
}

.welcome-navigation .btn.primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border: none;
  color: var(--color-text-inverse);
}

.welcome-navigation .btn:not(.primary) {
  background: var(--color-bg-interactive);
  border: 1px solid var(--color-border-default);
  color: var(--color-text-primary);
}

.welcome-navigation .btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .page-header {
    padding: 2rem 2rem 1.5rem;
  }
  
  .page-header h1 {
    font-size: 2rem;
  }
  
  .family-setup-container {
    padding: 2rem;
  }
  
  .setup-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
    padding: 2rem;
  }
  
  .setup-actions .btn {
    min-width: auto;
  }
  
  .child-card {
    padding: 1.5rem;
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }
  
  .child-actions {
    justify-content: center;
  }
  
  .modal-content {
    width: 95%;
    margin: 1rem;
  }
  
  .modal-header,
  .modal-body,
  .modal-footer {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
  
  .welcome-page {
    padding: 1rem 0.5rem;
  }
  
  .welcome-container {
    margin: 0;
  }
  
  .step-indicator {
    padding: 1rem;
  }
  
  .step-label {
    font-size: 0.8rem;
  }
  
  .welcome-step {
    padding: 2rem 1rem;
    min-height: 300px;
  }
  
  .step-content h1 {
    font-size: 1.6rem;
  }
  
  .user-type-cards {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .welcome-navigation {
    padding: 1rem;
  }
}

/* ==========================================================================
   UNIVERSAL BUTTON & MATERIAL ICONS FIXES
   ========================================================================== */

/* Enhanced Material Icons Support for all Buttons */
.btn .material-icons,
button .material-icons,
[role="button"] .material-icons {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: inherit;
  line-height: 1;
  vertical-align: middle;
  margin-right: 0.5rem;
  flex-shrink: 0;
}

/* Ensure proper button text alignment and prevent overflow */
.btn,
button,
[role="button"] {
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-family: inherit;
  line-height: 1.5;
}

/* Fix for MCQ and activity buttons */
.activity-actions .btn,
.mcq-activity .btn,
.activity .btn {
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  min-width: auto;
  flex-shrink: 0;
}

/* Ensure Material Icons fallback system works correctly */
.material-icons.fallback,
.material-icons[data-processed="true"] {
  font-family: inherit !important;
  font-style: normal;
  font-weight: normal;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}

/* Button icon-text separation */
.btn .material-icons + *:not(:empty),
button .material-icons + *:not(:empty) {
  margin-left: var(--space-2);
}

/* Prevent text and icon overlap in all button types */
.btn > *,
button > * {
  flex-shrink: 0;
  white-space: nowrap;
}

/* Enhanced check button styling for MCQ activities */
#checkAnswerBtn,
#correctBtn,
.check-btn,
.mcq-check-btn {
  background: var(--color-primary) !important;
  color: var(--color-text-inverse) !important;
  border: none !important;
  border-radius: var(--radius-lg) !important;
  padding: var(--space-3) var(--space-6) !important;
  font-weight: var(--font-medium) !important;
  box-shadow: var(--shadow-sm) !important;
  transition: all var(--transition-normal) !important;
  min-height: 48px !important;
}

#checkAnswerBtn:hover,
#correctBtn:hover,
.check-btn:hover,
.mcq-check-btn:hover {
  background: var(--color-primary-dark) !important;
  transform: translateY(-1px) !important;
  box-shadow: var(--shadow-md) !important;
}

/* Navigation and action buttons consistency */
.activity-actions__left .btn,
.activity-actions__right .btn,
.activity-actions__center .btn {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: var(--space-2) !important;
  white-space: nowrap !important;
  padding: var(--space-3) var(--space-4) !important;
}

/* Debug: Ensure no text overlap in any button */
button *,
.btn * {
  pointer-events: none; /* Prevent child elements from interfering with button clicks */
}

button,
.btn {
  pointer-events: all; /* But allow the button itself to be clickable */
}

/* Icon-only buttons */
.btn--icon .material-icons {
  margin-right: 0 !important;
  margin-left: 0 !important;
}

/* Ensure consistent button heights across the application */
.btn,
button:not(.btn--icon) {
  min-height: 44px; /* Accessibility-friendly touch target */
  padding: var(--space-3) var(--space-4);
}

@media (max-width: 768px) {
  .btn,
  button:not(.btn--icon) {
    min-height: 48px; /* Larger touch targets on mobile */
    padding: var(--space-4) var(--space-6);
  }
}

/* ===========================================
   DRAG AND DROP ACTIVITIES STYLES
   =========================================== */

/* Build Activity Styles */
.build-activity {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-6);
}

.build-instructions {
  text-align: center;
  margin-bottom: var(--space-8);
  padding: var(--space-6);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-default);
}

.build-target {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.build-hint {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  font-style: italic;
}

/* Letter Bank Styles */
.letter-bank {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(56px, max-content));
  gap: var(--space-3);
  padding: var(--space-6);
  background: var(--color-bg-tertiary);
  border: 2px dashed var(--color-border-muted);
  border-radius: var(--radius-lg);
  min-height: 80px;
  margin-bottom: var(--space-6);
  transition: all var(--transition-normal);
  justify-content: center;
  align-content: center;
  justify-items: center;
}

.letter-bank.empty {
  background: var(--color-bg-subtle);
  border-color: var(--color-border-light);
  opacity: 0.6;
}

.letter-bank.empty::after {
  content: "All letters used! 🎉";
  color: var(--color-text-tertiary);
  font-style: italic;
  font-size: var(--text-sm);
}

/* Drop Zone Styles */
.drop-zone {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: var(--space-6);
  background: var(--color-bg-canvas);
  border: 3px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  min-height: 100px;
  margin-bottom: var(--space-6);
  transition: all var(--transition-normal);
  justify-content: center;
  align-items: center;
  position: relative;
}

.drop-zone.empty {
  border-style: dashed;
  background: var(--color-bg-subtle);
}

.drop-zone.empty::after {
  content: attr(data-empty-label);
  color: var(--color-text-tertiary);
  font-style: italic;
  font-size: var(--text-base);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.drop-zone.drag-over {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
  transform: scale(1.02);
  box-shadow: 0 8px 25px rgba(96, 165, 250, 0.15);
}

/* Drag Item Styles */
.drag-item {
  background: var(--color-bg-card);
  border: 2px solid var(--color-border-interactive);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  cursor: grab;
  user-select: none;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
  min-width: 48px;
  text-align: center;
  position: relative;
  touch-action: manipulation;
}

.drag-item:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.drag-item:active,
.drag-item.dragging {
  cursor: grabbing;
  transform: rotate(5deg) scale(1.05);
  opacity: 0.8;
  z-index: 1000;
  box-shadow: 0 10px 25px var(--shadow-color);
}

.drag-item.touch-active {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: scale(1.05);
}

.drag-item.pending-removal {
  opacity: 0.6;
  transform: scale(0.95);
}

.drag-item:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Click-to-remove visual feedback */
.drag-item[data-clicking="true"] {
  animation: removeClick 0.3s ease-out;
}

@keyframes removeClick {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(0.9); opacity: 0.5; }
  100% { transform: scale(1); opacity: 0.5; }
}

.touch-tip {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-muted);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.touch-tip .material-icons {
  font-size: var(--text-lg);
  color: var(--color-primary);
}

.sequencing-touch-tip {
  justify-content: center;
  text-align: left;
}

/* Sequencing Activity Styles */
.sequencing {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-6);
}

.sequencing h3 {
  text-align: center;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  font-size: var(--text-2xl);
}

.sequencing p {
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  font-size: var(--text-base);
}

.sequencing-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-default);
}

.sequencing-item {
  background: var(--color-bg-card);
  border: 2px solid var(--color-border-default);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-6);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  cursor: grab;
  user-select: none;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  position: relative;
  line-height: 1.5;
  touch-action: manipulation;
}

.sequencing-item:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.sequencing-item.dragging {
  cursor: grabbing;
  opacity: 0.7;
  transform: rotate(2deg) scale(1.02);
  z-index: 1000;
  box-shadow: 0 8px 25px var(--shadow-color);
}

.sequencing-item.touch-selected {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.sequencing-item::before {
  content: "⋮⋮";
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-tertiary);
  font-size: var(--text-lg);
  line-height: 0.7;
  opacity: 0.5;
}

/* Mobile Responsive Adjustments */
@media (max-width: 768px) {
  .build-activity,
  .sequencing {
    padding: var(--space-4);
  }
  
  .build-instructions,
  .sequencing-container {
    padding: var(--space-4);
  }
  
  .letter-bank,
  .drop-zone {
    padding: var(--space-4);
    min-height: 70px;
  }

  .letter-bank {
    grid-template-columns: repeat(auto-fit, minmax(52px, 1fr));
  }
  
  .drag-item {
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-lg);
    min-width: 44px;
  }
  
  .sequencing-item {
    padding: var(--space-4) var(--space-5);
    font-size: var(--text-sm);
  }

  .sequencing-touch-tip {
    font-size: var(--text-sm);
  }
  
  .build-target {
    font-size: var(--text-xl);
  }
  
  .build-hint {
    font-size: var(--text-sm);
  }
}

/* Touch Device Enhancements */
@media (pointer: coarse) {
  .drag-item,
  .sequencing-item {
    min-height: 48px;
    padding: var(--space-4) var(--space-5);
  }
  
  .drag-item:hover,
  .sequencing-item:hover {
    /* Reduce hover effects on touch devices */
    transform: none;
  }
  
  .drag-item:active,
  .sequencing-item.dragging {
    transform: scale(1.05);
  }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  .drag-item,
  .sequencing-item {
    border-width: 3px;
  }
  
  .drop-zone {
    border-width: 4px;
  }
  
  .letter-bank {
    border-width: 3px;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  .drag-item,
  .sequencing-item,
  .drop-zone,
  .letter-bank {
    transition: none;
  }
  
  .drag-item:hover,
  .sequencing-item:hover {
    transform: none;
  }
  
  .drag-item.dragging,
  .sequencing-item.dragging {
    transform: none;
    opacity: 0.8;
  }
  
  @keyframes removeClick {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
  }
}

/* Focus Visible Support for Keyboard Navigation */
.drag-item:focus-visible,
.sequencing-item:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-color: var(--color-primary);
}

/* Animation for successful completion */
@keyframes slideInBounce {
  0% {
    opacity: 0;
    transform: translateY(-20px) scale(0.9);
  }
  50% {
    opacity: 1;
    transform: translateY(5px) scale(1.02);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Screen reader only content */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== PROGRESS PAGE ENHANCEMENTS ===== */

/* Activity Item Styles */
.activity-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-3);
  transition: all var(--transition-normal);
}

.activity-item:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-border-interactive);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.activity-info h4 {
  margin: 0 0 var(--space-1) 0;
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.activity-info p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.activity-date {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  display: block;
  margin-top: var(--space-1);
}

.activity-score {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-success-subtle);
  color: var(--color-success-emphasis);
  border-radius: var(--radius-md);
  font-weight: var(--font-semibold);
  font-size: var(--text-sm);
}

.activity-score .material-icons {
  font-size: 16px;
  color: var(--color-success-emphasis);
}

/* Achievement Item Styles */
.achievement-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-3);
  transition: all var(--transition-normal);
}

.achievement-item.unlocked {
  border-color: var(--color-success-emphasis);
  background: linear-gradient(135deg, var(--color-success-subtle), var(--color-bg-secondary));
}

.achievement-item.locked {
  opacity: 0.6;
}

.achievement-item:hover {
  background: var(--color-bg-tertiary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.achievement-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-primary-subtle);
  color: var(--color-primary-emphasis);
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.achievement-icon .material-icons {
  font-size: 24px;
}

.achievement-item.unlocked .achievement-icon {
  background: var(--color-success-subtle);
  color: var(--color-success-emphasis);
}

.achievement-info {
  flex: 1;
}

.achievement-info h4 {
  margin: 0 0 var(--space-1) 0;
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}

.achievement-info p {
  margin: 0 0 var(--space-2) 0;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.achievement-status {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.achievement-status.unlocked {
  background: var(--color-success-subtle);
  color: var(--color-success-emphasis);
}

.achievement-status.locked {
  background: var(--color-neutral-subtle);
  color: var(--color-text-tertiary);
}

/* Activity List Layout */
.activity-list {
  max-width: 100%;
}

/* Achievements Grid Layout */
.achievements-grid {
  display: grid;
  gap: var(--space-3);
  max-width: 100%;
}

/* Empty state improvements */
.empty-state-message {
  text-align: center;
  padding: var(--space-6);
  color: var(--color-text-secondary);
}

.empty-state-message .material-icons {
  font-size: 48px;
  margin-bottom: var(--space-3);
  opacity: 0.5;
}

.empty-state-message p {
  margin: 0;
  font-size: var(--text-base);
}

.empty-state-message .text-micro {
  font-size: var(--text-xs);
  margin-top: var(--space-2);
  opacity: 0.8;
}

/* Mobile responsiveness for progress sections */
@media (max-width: 768px) {
  .activity-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
  }
  
  .activity-score {
    align-self: flex-end;
  }
  
  .achievement-item {
    flex-direction: column;
    text-align: center;
    gap: var(--space-3);
    padding: var(--space-5);
  }
  
  .achievement-info {
    text-align: center;
  }
  
  .activity-list,
  .achievements-grid {
    padding: 0 var(--space-2);
  }
}

/* Dynamic Progress Bar Styles - replacing inline styles */
.dynamic-progress-bar {
  transition: width 0.3s ease-in-out;
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  border-radius: inherit;
}

/* Debug Panel Fallback Styles - replacing inline styles */
.debug-panel-fallback-header {
  padding: 16px;
  border-bottom: 1px solid var(--color-border-default, #444);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.debug-panel-fallback-title {
  margin: 0;
  color: var(--color-primary, #4f46e5);
}

.debug-panel-fallback-close {
  background: none;
  border: none;
  color: var(--color-text-secondary, #ccc);
  cursor: pointer;
  font-size: 18px;
}

.debug-panel-fallback-content {
  padding: 16px;
  max-height: 400px;
  overflow-y: auto;
}

.debug-panel-fallback-section {
  margin-bottom: 20px;
}

.debug-panel-fallback-section-title {
  margin: 0 0 8px 0;
  color: var(--color-text-primary, #fff);
}

.debug-panel-fallback-info-box {
  background: var(--color-bg-primary, #1a1a1a);
  padding: 12px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 12px;
}

.debug-panel-fallback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.debug-panel-fallback-btn {
  padding: 8px 12px;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
}

.debug-panel-fallback-btn--primary {
  background: var(--color-primary, #4f46e5);
}

.debug-panel-fallback-btn--danger {
  background: #dc2626;
}

.debug-panel-fallback-btn--success {
  background: #059669;
}

.debug-panel-fallback-btn--warning {
  background: #f59e0b;
}

.debug-panel-fallback-console {
  background: var(--color-bg-primary, #1a1a1a);
  padding: 12px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 11px;
  max-height: 150px;
  overflow-y: auto;
}

.debug-panel-fallback-console-success {
  color: #10b981;
}

.debug-panel-fallback-console-info {
  color: #6b7280;
}

.debug-panel-fallback-console-highlight {
  color: #8b5cf6;
}

/* ====================================
   CONVERSATION ACTIVITY STYLES
   ====================================
   Modern chat bubble interface for conversation activities
   - Speech bubble styling like text messaging apps
   - Proper text wrapping and responsive design
   - Alternating speaker alignment (left/right)
   - Mobile-friendly layout
*/

/* Guided Dialogue Activity */
.activity.dialogue {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-5), 4vw, var(--space-6));
  box-shadow: var(--shadow-sm);
}

.dialogue-context {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-subtle);
  padding: var(--space-4);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.dialogue-container {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding-block: var(--space-1);
  max-height: clamp(360px, 65vh, 560px);
  overflow-y: auto;
  scroll-behavior: smooth;
  padding-right: var(--space-1);
}

.dialogue-controls {
  display: flex;
  justify-content: flex-end;
  margin-top: var(--space-2);
}

.dialogue-controls .continue-btn {
  min-width: clamp(140px, 40vw, 200px);
}

.dialogue-response {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.response-option {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4);
  cursor: pointer;
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

.response-option:hover,
.response-option:focus-visible {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}

.response-option.selected {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}

.dialogue-input {
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-default);
  background: var(--color-bg-primary);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.dialogue-input:focus-visible {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
  outline: none;
}

.chat-turn.person-a .response-option {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--color-text-inverse);
}

.chat-turn.person-a .response-option:hover,
.chat-turn.person-a .response-option:focus-visible {
  border-color: rgba(255, 255, 255, 0.7);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.15);
}

.chat-turn.person-a .response-option.selected {
  background: rgba(255, 255, 255, 0.3);
  color: var(--color-text-inverse);
}

.chat-turn.person-a .dialogue-input {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--color-text-inverse);
}

.chat-turn.person-a .dialogue-input::placeholder {
  color: rgba(255, 255, 255, 0.75);
}

/* Shared chat bubble interface */
.chat-thread {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  width: 100%;
}

.chat-turn {
  display: flex;
  align-items: flex-end;
  gap: var(--space-3);
  width: 100%;
  position: relative;
}

.chat-turn.person-a {
  justify-content: flex-start;
  flex-direction: row;
}

.chat-turn.person-b {
  justify-content: flex-end;
  flex-direction: row-reverse;
}

.chat-bubble {
  max-width: min(420px, 85%);
  padding: var(--space-4);
  border-radius: var(--radius-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-xs);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  position: relative;
  line-height: var(--leading-relaxed);
  word-wrap: break-word;
  overflow-wrap: anywhere;
}

.chat-turn.person-a .chat-bubble {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-text-inverse);
  border-color: transparent;
}

.chat-turn.person-b .chat-bubble {
  color: var(--color-text-primary);
}

.chat-turn.person-a .chat-bubble::before,
.chat-turn.person-b .chat-bubble::before {
  content: '';
  position: absolute;
  bottom: 18px;
  width: 0;
  height: 0;
  border: 10px solid transparent;
}

.chat-turn.person-a .chat-bubble::before {
  left: -10px;
  border-right-color: var(--color-primary);
  border-top-color: var(--color-primary);
}

.chat-turn.person-b .chat-bubble::before {
  right: -10px;
  border-left-color: var(--color-bg-card);
  border-top-color: var(--color-bg-card);
}

.chat-speaker {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  opacity: 0.8;
}

.chat-turn.person-a .chat-speaker {
  color: rgba(255, 255, 255, 0.8);
}

.chat-turn.person-b .chat-speaker {
  color: var(--color-text-secondary);
}

.chat-text {
  font-size: var(--text-base);
  font-weight: var(--font-medium);
}

.chat-translation {
  font-size: var(--text-sm);
  font-style: italic;
  color: var(--color-text-secondary);
}

.chat-turn.person-a .chat-translation {
  color: rgba(255, 255, 255, 0.85);
}

.chat-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.chat-turn.person-b .chat-actions {
  justify-content: flex-end;
}

.chat-audio-btn {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full);
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: inherit;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
  padding: 0;
}

.chat-audio-btn:hover,
.chat-audio-btn:focus-visible {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
  transform: scale(1.05);
  outline: none;
}

.chat-audio-btn:active {
  transform: scale(0.95);
}

.chat-audio-btn .material-icons {
  font-size: 20px;
}

@media (max-width: 900px) {
  .activity.dialogue,
  .activity.conversation {
    padding: clamp(var(--space-4), 6vw, var(--space-5));
  }

  .chat-bubble {
    max-width: min(480px, 90%);
    padding: var(--space-3) var(--space-4);
  }

  .chat-translation {
    font-size: var(--text-xs);
  }

  .chat-audio-btn {
    width: 36px;
    height: 36px;
  }

  .chat-audio-btn .material-icons {
    font-size: 18px;
  }
}

@media (max-width: 640px) {
  .chat-turn {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
  }

  .chat-turn.person-b {
    align-items: flex-end;
  }

  .chat-bubble {
    max-width: 100%;
  }

  .chat-turn.person-a .chat-bubble::before,
  .chat-turn.person-b .chat-bubble::before {
    display: none;
  }

  .chat-actions {
    justify-content: flex-start;
  }

  .dialogue-controls {
    justify-content: stretch;
  }

  .dialogue-controls .continue-btn {
    width: 100%;
  }

  .dialogue-container {
    max-height: none;
    padding-right: 0;
  }
}

@media (max-width: 480px) {
  .chat-bubble {
    padding: var(--space-3);
  }

  .chat-speaker {
    font-size: var(--text-2xs);
  }

  .chat-text {
    font-size: var(--text-sm);
  }
}

/* Conversation Activity Container */
.activity.conversation {
  background: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-5), 4vw, var(--space-6));
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-xs);
}

/* Conversation Context Section */
.conversation-context {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-6);
  text-align: center;
}

.conversation-context p {
  margin: 0;
  font-style: italic;
  color: var(--color-text-secondary);
  font-size: var(--text-base);
}

.conversation-turns {
  padding: var(--space-2) 0;
}

.turn-french {
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-1);
  word-spacing: 0.05em;
}

.turn-english {
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  font-style: italic;
  color: var(--color-text-secondary);
}

.conversation-turn.person-a .turn-english {
  color: rgba(255, 255, 255, 0.85);
}

.conversation-turn.speaking .conversation-bubble {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
  animation: pulse-glow 1s ease-in-out infinite alternate;
}

@keyframes pulse-glow {
  0% {
    box-shadow: var(--shadow-md);
  }
  100% {
    box-shadow: 0 0 20px rgba(96, 165, 250, 0.4);
  }
}

/* Conversation Practice Section */
.conversation-practice {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-top: var(--space-6);
  text-align: center;
  border: 1px solid var(--color-border-subtle);
}

.conversation-practice h4 {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.conversation-practice p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  font-size: var(--text-base);
}

.conversation-practice .replay-btn {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border: none;
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.conversation-practice .replay-btn:hover {
  background: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.conversation-practice .replay-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

@media (max-width: 900px) {
  .conversation-practice {
    padding: var(--space-4);
  }
}/* === Lessons pagination and density enhancements === */
.lessons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(clamp(260px, 28vw, 360px), 1fr));
  gap: clamp(1rem, 1.6vw, 2rem);
  align-content: start;
}

@media (min-width: 1200px) {
  .lessons-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  }
}

.lessons-controls {
  align-items: stretch;
  gap: clamp(1rem, 2vw, 1.5rem);
  flex-wrap: wrap;
}

.lessons-controls > * {
  flex: 1 1 260px;
}

.lessons-meta {
  gap: clamp(0.5rem, 1.5vw, 1.25rem);
  justify-content: space-between;
}

.lessons-count {
  white-space: nowrap;
}

.lesson-card-wrapper--animated {
  opacity: 0;
  transform: translateY(10px);
  animation: lesson-card-fade 320ms ease forwards;
  animation-delay: var(--stagger-delay, 0ms);
}

@keyframes lesson-card-fade {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Lessons accordion overrides ensure consistent single-column layout */
.lessons-grid {
  display: flex !important;
  flex-direction: column !important;
  gap: clamp(var(--space-md), 2vw, var(--space-lg)) !important;
  padding: 0 !important;
}

@media (max-width: 768px) {
  .lessons-grid {
    gap: var(--space-md) !important;
  }
}

.pagination-container {
  margin-top: clamp(1.5rem, 2.5vw, 3rem);
}

.pagination-container.hidden {
  display: none;
}

.pagination {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
}

.pagination__summary {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
}

.pagination__controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

.pagination-button {
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: rgba(15, 23, 42, 0.4);
  color: var(--color-text-primary);
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
}

.pagination-button:hover:not(:disabled) {
  transform: translateY(-1px);
  border-color: rgba(96, 165, 250, 0.7);
  color: var(--color-primary-light, #93c5fd);
}

.pagination-button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.pagination-button.is-active {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.85), rgba(129, 140, 248, 0.85));
  border-color: rgba(59, 130, 246, 0.7);
  color: #fff;
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.25);
}

.pagination-button--icon {
  padding: 0.5rem;
}

.pagination-ellipsis {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-tertiary);
  padding: 0 0.25rem;
  font-size: var(--text-base);
}

.lessons-toast {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.9);
  color: #fff;
  box-shadow: 0 18px 45px rgba(37, 99, 235, 0.35);
  transform: translateY(-10px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 1300;
}

.lessons-toast.show {
  opacity: 1;
  transform: translateY(0);
}

.lessons-toast .material-icons {
  font-size: 1.2rem;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 640px) {
  .lessons-controls > * {
    flex: 1 1 100%;
  }

  .pagination {
    align-items: stretch;
  }

  .pagination__controls {
    justify-content: space-between;
  }

  .lessons-toast {
    left: 1rem;
    right: 1rem;
    justify-content: center;
  }
}
/* Mobile-first responsive refinements */
@media (max-width: 768px) {
  .header {
    height: auto;
  }

  .header__container {
    padding: 0 var(--space-4);
    min-height: var(--header-height);
    flex-wrap: wrap;
    gap: var(--space-3);
  }

  .header__left {
    flex: 1 1 auto;
  }

  .header__controls {
    flex: 1 1 auto;
    justify-content: flex-end;
  }

  .header__title {
    font-size: var(--text-lg);
  }

  .btn--icon {
    width: 44px;
    height: 44px;
  }

  .page__main {
    width: 100%;
    padding: var(--space-6) var(--space-4) var(--space-10);
    gap: var(--space-2xl);
  }

  .page__header {
    padding: var(--space-5) var(--space-3);
    margin-bottom: var(--space-6);
  }

  .page__title {
    font-size: var(--text-2xl);
  }

  .page__subtitle {
    font-size: var(--text-base);
  }

  .dark-header {
    padding: var(--space-2xl) var(--space-xl);
  }

  .dark-header h1 {
    font-size: var(--text-3xl);
  }

  .dark-header p {
    font-size: var(--text-base);
  }

  .dark-content {
    padding: var(--space-2xl) var(--space-xl);
    gap: var(--space-xl);
  }

  .dashboard {
    padding: var(--space-xl) var(--space-md);
  }

  .hero.dark-hero {
    padding: var(--space-xl) var(--space-3);
  }

  .hero__content.dark-hero-content {
    padding: var(--space-3xl) var(--space-xl);
  }

  .hero__cta {
    display: grid;
    gap: var(--space-3);
  }

  .hero__cta .btn {
    width: 100%;
  }

  .hero__stats {
    gap: var(--space-3);
  }

  .hero-card {
    max-width: none;
  }

  .welcome-banner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-lg);
    padding: var(--space-2xl) var(--space-xl);
  }

  .welcome-banner__streak {
    width: 100%;
    justify-content: space-between;
  }

  .overview-card {
    padding: var(--space-lg);
  }

  .learning-flow,
  .solo-plan,
  .goals-achievements-container {
    grid-template-columns: 1fr;
  }

  .footer__container {
    flex-direction: column;
    align-items: stretch;
    text-align: left;
    gap: var(--space-md);
  }
}

@media (max-width: 640px) {
  .header__container {
    padding: 0 var(--space-3);
  }

  .header__left {
    flex: 1 1 auto;
    justify-content: flex-start;
    gap: var(--space-3);
  }

  .header__controls {
    flex: 0 0 auto;
    justify-content: flex-end;
    gap: var(--space-2);
  }

  .header__title {
    font-size: var(--text-lg);
  }

  .hero__title {
    font-size: var(--text-3xl);
  }

  .hero__subtitle {
    font-size: var(--text-base);
  }

  .hero__stats {
    grid-template-columns: 1fr;
  }

  .hero-card {
    padding: var(--space-xl);
  }

  .welcome-banner__title {
    font-size: var(--text-xl);
  }

  .welcome-banner__streak {
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  .overview-card {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .overview-card .card-icon {
    width: 48px;
    height: 48px;
  }

  .learning-flow__card,
  .solo-plan__card {
    padding: var(--space-4);
  }

  .dark-content {
    padding: var(--space-xl) var(--space-lg);
    gap: var(--space-lg);
  }

  .footer__left,
  .footer__right {
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .header {
    padding-block: var(--space-2);
  }

  .header__container {
    gap: var(--space-2);
    flex-wrap: wrap;
    padding: 0 var(--space-3);
  }

  .header__left {
    flex: 1 1 auto;
    gap: var(--space-2);
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .header__logo {
    width: 32px;
    height: 32px;
  }

  .header__title {
    flex: 1 1 100%;
    font-size: var(--text-lg);
    text-align: center;
    margin-top: var(--space-1);
    order: 3;
  }

  .header__controls {
    justify-content: flex-end;
    margin-left: auto;
  }

  .btn--icon {
    width: 40px;
    height: 40px;
  }

  .page__title {
    font-size: var(--text-xl);
  }

  .page__subtitle {
    font-size: var(--text-sm);
  }

  .hero__title {
    font-size: var(--text-2xl);
  }

  .hero__subtitle {
    font-size: var(--text-base);
  }

  .overview-cards {
    grid-template-columns: 1fr;
  }

  .welcome-banner {
    padding: var(--space-xl);
  }

  .footer__container {
    text-align: center;
  }
}

/* === End enhancements === */
.analysis-points-list,
.project-steps,
.research-steps {
  margin: 0;
  padding-left: 1.5rem;
  display: grid;
  gap: 0.5rem;
}

.analysis-points-list li,
.project-steps li,
.research-steps li {
  line-height: 1.6;
}

.listening-steps {
  display: grid;
  gap: 0.75rem;
}

.listening-step {
  display: grid;
  gap: 0.25rem;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid rgba(148, 163, 184, 0.2);
}

.listening-step__index {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.2);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-semibold);
}

.song-lyrics {
  display: grid;
  gap: 0.75rem;
}

.song-line {
  padding: 0.75rem 1rem;
  border-radius: 12px;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.25);
}

.song-line__en {
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
  margin: 0;
}

.debate-columns {
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  .debate-columns {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }
}

.debate-column ul {
  margin: 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.35rem;
}

.writing-response {
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  background: rgba(15, 23, 42, 0.4);
  padding: 0.75rem 1rem;
  color: var(--color-text-primary);
  font-size: var(--text-base);
  resize: vertical;
}

.roleplay-scenario {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.roleplay-prompts-list {
  margin: 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.4rem;
}

.analysis-tips ul,
.research-resources ul {
  margin: 0.5rem 0 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.35rem;
}

/* Homeschool & family enhancements */
.form-list {
  margin: 0.75rem 0 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.5rem;
  color: var(--color-text-secondary);
}

.completion-extras {
  margin-top: 1.5rem;
  display: grid;
  gap: 1rem;
}

.completion-extras__column {
  background: rgba(15, 23, 42, 0.4);
  border-radius: 16px;
  padding: 1rem 1.25rem;
  border: 1px solid rgba(59, 130, 246, 0.25);
  display: grid;
  gap: 0.5rem;
}

.completion-extras__column h4 {
  margin: 0;
  font-size: var(--text-lg);
  color: var(--color-text-primary);
}

.completion-extras__column ul {
  margin: 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.35rem;
}

.family-progress__grid {
  display: grid;
  gap: 1.25rem;
}

.family-progress__column {
  background: rgba(15, 23, 42, 0.45);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 18px;
  padding: 1.25rem;
  display: grid;
  gap: 0.6rem;
}

.family-progress__heading {
  margin: 0;
  font-size: var(--text-lg);
  color: var(--color-text-primary);
}

.family-progress__list {
  margin: 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.45rem;
  color: var(--color-text-secondary);
}

.family-progress__cta-group {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.celebration-ideas {
  display: grid;
  gap: 1rem;
}

.celebration-ideas__column {
  background: rgba(15, 23, 42, 0.45);
  border-radius: 16px;
  padding: 1.25rem;
  border: 1px solid rgba(236, 72, 153, 0.25);
  display: grid;
  gap: 0.5rem;
}

.celebration-ideas__column h3 {
  margin: 0;
  font-size: var(--text-lg);
}

.celebration-ideas__column ul {
  margin: 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.4rem;
  color: var(--color-text-secondary);
}

.grade-guidance ul {
  margin: 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.5rem;
  color: var(--color-text-secondary);
}

@media (min-width: 640px) {
  .completion-extras {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .family-progress__grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }

  .celebration-ideas {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }
}

@media (max-width: 640px) {
  .family-progress__grid {
    gap: var(--space-4);
  }

  .family-progress__cta-group {
    flex-direction: column;
    align-items: stretch;
  }

  .family-progress__cta-group .btn {
    width: 100%;
    justify-content: center;
  }

  .celebration-ideas__column {
    padding: var(--space-5);
  }
}

/* Global responsive enhancements to support comfortable mobile navigation */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table-responsive table {
  min-width: 640px;
}

@media (max-width: 900px) {
  .header {
    height: auto;
    padding: var(--space-2) 0;
  }

  .header__container {
    flex-wrap: wrap;
    padding: 0 var(--space-4);
    gap: var(--space-3);
  }

  .header__left {
    flex: 1 1 100%;
    justify-content: space-between;
  }

  .header__controls {
    flex: 1 1 100%;
    justify-content: flex-end;
    gap: var(--space-2);
  }

  .header__title {
    font-size: var(--text-lg);
  }

  .page__main,
  .dark-page,
  .dark-container {
    padding: var(--space-6) var(--space-4);
  }

  .dark-content {
    padding: var(--space-6) var(--space-4);
  }

  .hero {
    min-height: auto;
    padding: var(--space-8) var(--space-3);
  }

  .hero--split {
    align-items: stretch;
    text-align: left;
    gap: var(--space-6);
  }

  .hero__cta {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
  }

  .hero__cta .btn {
    width: 100%;
  }

  .hero__stats {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  }

  .hero__aside {
    order: 2;
    width: 100%;
  }

  .hero-card {
    width: 100%;
    max-width: 520px;
    margin-inline: auto;
  }

  .features__grid,
  .skill-tracks__grid,
  .practice-planner__grid,
  .journey__steps,
  .family-progress__grid,
  .celebration-ideas,
  .lesson-path__grid,
  .dashboard-grid,
  .progress-grid,
  .cards-grid,
  .stats-grid,
  .summary-grid,
  .cta-grid,
  .levels-grid,
  .tiles-grid,
  .resources-grid,
  .dark-grid,
  .feature-grid,
  .solo-progress__grid,
  .solo-journey__body {
    grid-template-columns: 1fr !important;
  }

  .practice-planner__content,
  .skill-tracks__grid,
  .features__grid {
    gap: var(--space-4);
  }

  .practice-planner__cta {
    display: block;
    text-align: center;
  }

  .sidebar {
    width: min(320px, 85vw);
  }

  .sidebar__content {
    padding-bottom: var(--space-8);
  }

  .sidebar__nav-link {
    font-size: var(--text-base);
  }

  .progress-bar {
    height: 6px;
  }

  .card,
  .feature-card,
  .skill-card,
  .practice-card,
  .dark-card {
    padding: var(--space-lg);
  }

  .layout-row,
  .cta-banner,
  .responsive-stack {
    flex-direction: column;
    gap: var(--space-4);
  }

  .cta-banner .btn,
  .cta-grid .btn,
  .cta-panel .btn {
    width: 100%;
  }
}

@media (max-width: 540px) {
  .header__container {
    padding: 0 var(--space-3);
    gap: var(--space-2);
  }

  .header__controls {
    justify-content: space-between;
  }

  .btn--icon {
    width: 44px;
    height: 44px;
  }

  .hero__title {
    font-size: var(--text-2xl);
  }

  .hero__subtitle {
    font-size: var(--text-base);
  }

  .hero__stats {
    gap: var(--space-3);
  }

  .journey-step {
    padding: var(--space-lg);
  }

  .practice-card {
    text-align: left;
  }

  .dark-content {
    border-radius: var(--radius-xl);
  }
}

/* =============================================================
   Responsive architecture refresh (2024 mobile-first update)
   ---------------------------------------------------------
   These overrides establish fluid spacing, consistent gutters,
   and resilient grid behaviour across every page so content
   remains centered and readable on small screens.
   ============================================================= */

:root {
  --layout-max-width: 72rem;
  --layout-reading-width: 60ch;
  --layout-gutter: clamp(1rem, 4vw, 2.75rem);
  --layout-gutter-tight: clamp(0.75rem, 3vw, 1.75rem);
  --layout-section-gap: clamp(2.5rem, 6vw, 4.5rem);
  --layout-card-gap: clamp(1.25rem, 4vw, 2.25rem);
  --layout-card-radius: clamp(0.875rem, 2vw, 1.5rem);
  --layout-card-padding: clamp(1.25rem, 4vw, 2rem);
}

@media (max-width: 1024px) {
  :root {
    --layout-max-width: 64rem;
  }
}

@media (max-width: 768px) {
  :root {
    --layout-max-width: min(100vw, 58rem);
    --layout-card-gap: clamp(1rem, 5vw, 1.75rem);
    --layout-card-padding: clamp(1rem, 5vw, 1.5rem);
  }
}

@media (max-width: 640px) {
  :root {
    --layout-gutter: clamp(0.75rem, 5vw, 1.25rem);
    --layout-gutter-tight: clamp(0.5rem, 4vw, 1rem);
    --layout-card-radius: clamp(0.75rem, 4vw, 1.1rem);
    --sidebar-width: min(92vw, 320px);
  }
}

@media (max-width: 480px) {
  :root {
    --layout-max-width: 100vw;
    --layout-card-padding: clamp(0.875rem, 6vw, 1.25rem);
    --sidebar-width: 100vw;
  }
}

body {
  font-family: var(--font-family-sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  text-wrap: balance;
}

.page__main {
  width: min(100%, var(--layout-max-width));
  margin-inline: auto;
  padding-inline: var(--layout-gutter);
  padding-block: clamp(2.5rem, 6vw, 4rem);
  gap: var(--layout-section-gap);
}

.page--landing .page__main {
  padding-top: clamp(1.5rem, 5vw, 2.5rem);
}

@media (max-width: 720px) {
  .page__main {
    padding-inline: var(--layout-gutter-tight);
    padding-bottom: clamp(3rem, 10vw, 4.5rem);
  }
}

.page__main > :where(section, article, .content-section):not(.hero) {
  max-width: var(--layout-max-width);
  margin-inline: auto;
  padding-inline: var(--layout-gutter);
}

@media (max-width: 720px) {
  .page__main > :where(section, article, .content-section):not(.hero) {
    padding-inline: var(--layout-gutter-tight);
  }
}

@media (max-width: 900px) {
  .page-header,
  .dark-header {
    text-align: left;
    padding: clamp(2rem, 6vw, 2.75rem) clamp(1.5rem, 6vw, 2.25rem);
  }

  .page-title,
  .dashboard__title {
    font-size: clamp(var(--text-3xl), 4vw, var(--text-4xl));
  }

  .page-description,
  .page__subtitle,
  .dashboard__subtitle {
    max-width: 60ch;
  }
}

@media (max-width: 768px) {
  .page-content,
  .dark-content {
    padding: var(--space-2xl) var(--space-lg);
    gap: var(--space-xl);
  }

  .content-card {
    padding: var(--space-2xl) var(--space-xl);
    margin-inline: 0;
  }

  .content-card__header {
    align-items: flex-start;
  }

  .content-card__body {
    gap: var(--space-xl);
  }

  .section-header,
  .dashboard__section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }

  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }

  .celebration-ideas__column {
    padding: var(--space-xl);
  }
}

@media (max-width: 600px) {
  .page-content,
  .dark-content {
    padding: var(--space-xl) var(--space-md);
  }

  .content-card {
    padding: var(--space-xl) var(--space-lg);
  }

  .content-card__header .section-title {
    font-size: var(--text-xl);
  }

  .section-subtitle,
  .page-description,
  .page__subtitle {
    font-size: var(--text-sm);
  }

  .celebration-ideas__column ul {
    padding-left: var(--space-lg);
  }
}

.header {
  padding-inline: var(--layout-gutter-tight);
}

.header__container {
  max-width: var(--layout-max-width);
  margin-inline: auto;
  padding-inline: 0;
  gap: clamp(0.75rem, 2vw, 1.5rem);
  flex-wrap: wrap;
}

.header__left {
  gap: clamp(0.5rem, 2vw, 1.25rem);
}

.header__title {
  font-size: clamp(1.1rem, 2.8vw, 1.5rem);
}

.header__controls {
  gap: clamp(0.5rem, 2vw, 1rem);
}

@media (min-width: 768px) {
  .header__container {
    flex-wrap: nowrap;
  }
}

@media (max-width: 640px) {
  .header__container {
    padding-inline: var(--layout-gutter-tight);
  }

  .header__left {
    width: 100%;
    justify-content: space-between;
  }

  .header__controls {
    width: 100%;
    justify-content: flex-end;
  }
}

.hero {
  padding-inline: var(--layout-gutter);
  padding-block: clamp(3rem, 12vw, 6rem);
  min-height: unset;
}

.hero--split {
  max-width: var(--layout-max-width);
  margin-inline: auto;
  gap: clamp(2rem, 6vw, 3.5rem);
  align-items: stretch;
}

.hero__content {
  padding-inline: 0;
}

.hero__cta {
  width: 100%;
  gap: clamp(0.75rem, 3vw, 1.25rem);
  justify-content: flex-start;
}

.hero__cta .btn {
  flex: 1 1 220px;
  min-width: min(100%, 220px);
}

@media (max-width: 720px) {
  .hero__cta {
    flex-direction: column;
    align-items: stretch;
  }
}

.hero__stats {
  gap: clamp(0.75rem, 3vw, 1.25rem);
}

.hero__aside {
  width: 100%;
  max-width: min(420px, 100%);
  margin-inline: auto;
}

.hero-card {
  width: 100%;
  padding: var(--layout-card-padding);
  border-radius: var(--layout-card-radius);
}

@media (max-width: 480px) {
  .hero-card__item {
    grid-template-columns: 1fr;
  }

  .hero-card__badge {
    justify-self: flex-start;
  }
}

.dark-page {
  width: min(100%, var(--layout-max-width));
  margin-inline: auto;
  padding-inline: var(--layout-gutter);
  padding-block: clamp(2.5rem, 6vw, 4rem);
  gap: var(--layout-section-gap);
}

@media (max-width: 720px) {
  .dark-page {
    padding-inline: var(--layout-gutter-tight);
  }
}

.dark-container {
  border-radius: var(--layout-card-radius);
  margin-inline: auto;
  max-width: 100%;
}

.dark-header {
  padding: clamp(2.5rem, 7vw, 3.5rem) clamp(1.75rem, 5vw, 3rem) clamp(1.5rem, 5vw, 2.5rem);
}

.dark-content {
  padding: clamp(1.5rem, 5vw, 3rem);
  gap: clamp(1.75rem, 5vw, 3rem);
}

@media (max-width: 640px) {
  .dark-content {
    padding: clamp(1.25rem, 6vw, 1.75rem);
  }
}

.overview-cards {
  gap: var(--layout-card-gap);
}

.overview-card {
  width: 100%;
  max-width: 100%;
  padding: clamp(1.25rem, 4vw, 1.75rem);
  gap: clamp(0.75rem, 3vw, 1.5rem);
}

.learning-flow {
  gap: var(--layout-card-gap);
}

.learning-flow__card {
  padding: clamp(1.25rem, 4vw, 1.75rem);
  border-radius: var(--layout-card-radius);
  width: 100%;
}

.journey-step,
.skill-card,
.practice-card,
.feature-card,
.dark-card,
.lesson-card,
.module-card,
.plan-card,
.goal-card,
.tile-card,
.progress-card,
.activity-card,
.dashboard-card,
.family-card,
.resource-card,
.cta-panel,
.summary-card,
.stats-card {
  border-radius: var(--layout-card-radius);
  padding: var(--layout-card-padding);
  max-width: 100%;
  width: 100%;
  box-sizing: border-box;
}

:is(.hero__stats,
     .overview-cards,
     .learning-flow,
     .lessons-grid,
     .journey__steps,
     .features__grid,
     .skill-tracks__grid,
     .practice-planner__grid,
     .family-progress__grid,
     .lesson-path__grid,
     .dashboard-grid,
     .progress-grid,
     .cards-grid,
     .cta-grid,
     .solo-progress__grid) {
  gap: var(--layout-card-gap);
}

:is(.hero__stats,
     .overview-cards,
     .learning-flow,
     .lessons-grid,
     .journey__steps,
     .features__grid,
     .skill-tracks__grid,
     .practice-planner__grid,
     .family-progress__grid,
     .lesson-path__grid,
     .dashboard-grid,
     .progress-grid,
     .cards-grid,
     .cta-grid,
     .solo-progress__grid) > * {
  min-width: 0;
}

@media (max-width: 720px) {
  .overview-cards,
  .learning-flow,
  .lessons-grid,
  .journey__steps,
  .features__grid,
  .skill-tracks__grid,
  .practice-planner__grid,
  .family-progress__grid,
  .lesson-path__grid,
  .dashboard-grid,
  .progress-grid,
  .cards-grid,
  .cta-grid,
  .solo-progress__grid {
    grid-template-columns: 1fr !important;
  }
}

.personalization-banner__container,
.journey__header,
.features__header,
.skill-tracks__header,
.practice-planner__header,
.dashboard__section,
.lessons-header,
.progress-header,
.settings__intro,
.family-progress__header {
  max-width: var(--layout-max-width);
  margin-inline: auto;
  padding-inline: var(--layout-gutter);
}

@media (max-width: 720px) {
  .personalization-banner__container,
  .journey__header,
  .features__header,
  .skill-tracks__header,
  .practice-planner__header,
  .dashboard__section,
  .lessons-header,
  .progress-header,
  .settings__intro,
  .family-progress__header {
    padding-inline: var(--layout-gutter-tight);
  }
}

.hero__title,
.dashboard__title,
.journey__title,
.features__title,
.skill-tracks__title,
.practice-planner__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
}

.hero__subtitle,
.dashboard__subtitle,
.journey__subtitle,
.features__subtitle,
.skill-tracks__subtitle,
.practice-planner__subtitle {
  max-width: var(--layout-reading-width);
  margin-inline: auto;
  font-size: clamp(1rem, 2.6vw, 1.25rem);
}

.hero-card__desc,
.journey-step__desc,
.learning-flow__description,
.overview-card .card-label,
.lesson-card__description,
.practice-card p,
.feature-card p {
  font-size: clamp(0.95rem, 2.4vw, 1.05rem);
  line-height: var(--leading-relaxed);
}

.hero__cta .btn,
.learning-flow__cta,
.journey-step__link,
.cta-panel .btn,
.cta-banner .btn {
  min-height: 52px;
}

.footer__container {
  max-width: var(--layout-max-width);
  margin-inline: auto;
  padding-inline: var(--layout-gutter);
}

@media (max-width: 720px) {
  .footer__container {
    padding-inline: var(--layout-gutter-tight);
  }
}

/* Focused homepage layout */
.hero.hero--focus {
  padding: 4rem 1.5rem 3rem;
  display: flex;
  justify-content: center;
}

.focus-card {
  background: var(--color-surface-elevated, rgba(17, 24, 39, 0.85));
  border-radius: 20px;
  padding: 3rem 2.5rem;
  max-width: 620px;
  width: 100%;
  text-align: center;
  box-shadow: 0 25px 60px rgba(15, 23, 42, 0.45);
}

.focus-card__title {
  font-size: clamp(2rem, 2.8vw, 2.6rem);
  margin-bottom: 0.75rem;
}

.focus-card__subtitle {
  color: var(--color-text-muted, #9ca3af);
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
}

.focus-card__resume {
  margin: 0 auto 1.75rem;
  color: var(--color-text-secondary, #a5b4fc);
  font-weight: 500;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.hero-actions .btn {
  min-width: 200px;
  justify-content: center;
}

.focus-shortcuts {
  padding: 0 1.5rem 3.5rem;
  max-width: 960px;
  margin: 0 auto;
}

.focus-shortcuts__header {
  text-align: center;
  margin-bottom: 1.75rem;
}

.focus-shortcuts__header h2 {
  font-size: 1.75rem;
  margin-bottom: 0.35rem;
}

.focus-shortcuts__header p {
  color: var(--color-text-muted, #94a3b8);
  margin: 0;
}

.focus-shortcuts__grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.focus-shortcut {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  border-radius: 16px;
  text-decoration: none;
  background: var(--color-surface-elevated, rgba(15, 23, 42, 0.85));
  border: 1px solid rgba(148, 163, 184, 0.08);
  color: var(--color-text-primary, #f8fafc);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.focus-shortcut:hover,
.focus-shortcut:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(96, 165, 250, 0.6);
}

.focus-shortcut__icon {
  font-size: 1.75rem;
  line-height: 1;
}

.focus-shortcut__content h3 {
  margin: 0 0 0.2rem;
  font-size: 1.05rem;
}

.focus-shortcut__content p {
  margin: 0;
  color: var(--color-text-muted, #94a3b8);
  font-size: 0.95rem;
}

@media (max-width: 640px) {
  .focus-card {
    padding: 2.25rem 1.75rem;
  }

  .hero-actions .btn {
    min-width: 100%;
  }

  .focus-shortcut {
    padding: 1.1rem 1.25rem;
  }
}

/* Dashboard compact panels */
.dashboard-panel {
  background: var(--color-surface-elevated, rgba(17, 24, 39, 0.85));
  border-radius: 20px;
  padding: 1.75rem;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.35);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.dashboard-panel__header {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.dashboard-panel__title {
  font-size: 1.4rem;
  margin: 0;
}

.dashboard-panel__subtitle {
  margin: 0;
  color: var(--color-text-muted, #94a3b8);
  font-size: 0.95rem;
}

.dashboard-panel__content {
  display: block;
}

.dashboard-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.dashboard-panel__actions .btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

@media (max-width: 768px) {
  .dashboard-panel {
    padding: 1.5rem;
  }
}

/* -------------------------------------------------------------- */
/* Kid mode theming and friendly learning journey components      */
/* -------------------------------------------------------------- */

:root {
  --kid-primary: #7dd3fc;
  --kid-secondary: #facc15;
  --kid-tertiary: #a855f7;
  --kid-accent: #34d399;
  --kid-deep: #f8fafc;
  --kid-cloud: rgba(15, 23, 42, 0.88);
  --kid-surface: rgba(15, 23, 42, 0.92);
  --kid-surface-soft: rgba(17, 24, 39, 0.86);
  --kid-surface-strong: rgba(2, 6, 23, 0.94);
  --kid-border-soft: rgba(96, 165, 250, 0.28);
  --kid-border-strong: rgba(148, 163, 184, 0.45);
  --kid-text-primary: #f8fafc;
  --kid-text-secondary: #cbd5f5;
  --kid-text-muted: rgba(203, 213, 225, 0.8);
  --kid-shadow: 0 24px 44px rgba(2, 6, 23, 0.55);
}

.kid-mode {
  background:
    radial-gradient(circle at 20% -10%, rgba(56, 189, 248, 0.12), transparent 55%),
    radial-gradient(circle at 85% 0%, rgba(168, 85, 247, 0.12), transparent 60%),
    linear-gradient(180deg, #0b1120 0%, #020617 80%);
  font-family: 'Baloo 2', 'Fredoka', 'Nunito', 'Segoe UI Rounded', sans-serif;
  color: var(--kid-text-primary);
  min-height: 100vh;
}

.kid-mode .app-header {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(30, 64, 175, 0.85));
  border: none;
  box-shadow: 0 24px 48px rgba(2, 6, 23, 0.6);
  padding: clamp(0.75rem, 2vw, 1rem) 0 clamp(0.5rem, 1.6vw, 0.75rem);
}

.kid-mode .app-header__container {
  align-items: center;
  gap: clamp(0.75rem, 3vw, 1.25rem);
}

.kid-mode .app-header__brand {
  gap: clamp(0.6rem, 2.5vw, 1rem);
}

.kid-mode .app-header__title {
  font-size: 1.5rem;
  color: var(--kid-text-primary);
  font-weight: 800;
}

.kid-mode .app-header__subtitle {
  color: var(--kid-text-secondary);
  font-weight: 600;
}

.kid-mode .app-header__nav {
  display: flex;
  gap: clamp(0.45rem, 2vw, 0.75rem);
  background: rgba(15, 23, 42, 0.7);
  padding: 0.55rem clamp(0.75rem, 4vw, 1.25rem);
  border-radius: 999px;
  border: 1px solid var(--kid-border-soft);
  box-shadow: 0 16px 32px rgba(2, 6, 23, 0.5);
  overflow-x: auto;
  width: min(100%, 520px);
  margin: 0 auto;
  scrollbar-width: none;
}

.kid-mode .app-header__nav::-webkit-scrollbar {
  display: none;
}

.kid-mode .app-header__link {
  font-size: clamp(0.9rem, 2.6vw, 1rem);
  font-weight: 700;
  color: var(--kid-text-primary);
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  border: 1px solid transparent;
  flex: 0 0 auto;
  background: transparent;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.kid-mode .app-header__link:hover,
.kid-mode .app-header__link:focus,
.kid-mode .app-header__link:focus-visible {
  background: rgba(125, 211, 252, 0.18);
  border-color: var(--kid-border-soft);
  transform: translateY(-2px);
  outline: none;
}

.kid-mode .app-header__link.is-active {
  background: rgba(125, 211, 252, 0.25);
  border-color: var(--kid-border-strong);
  color: var(--kid-text-primary);
}

.kid-mode .app-header__actions {
  display: none;
}

.kid-hero {
  max-width: 960px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: clamp(1.5rem, 4vw, 2.5rem);
  padding: clamp(1.5rem, 4vw, 2.5rem) clamp(1rem, 5vw, 1.75rem) 1.25rem;
  align-items: stretch;
}

.kid-hero__content {
  background: var(--kid-surface);
  border-radius: 32px;
  padding: clamp(1.75rem, 5vw, 2.75rem);
  box-shadow: var(--kid-shadow);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  border: 1px solid var(--kid-border-strong);
  backdrop-filter: blur(18px);
}

.kid-hero__title {
  margin: 0;
  font-size: clamp(2rem, 5vw, 2.8rem);
  color: var(--kid-text-primary);
  letter-spacing: 0.02em;
}

.kid-hero__subtitle {
  margin: 0;
  font-size: 1.05rem;
  color: var(--kid-text-secondary);
}

.kid-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.kid-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: 999px;
  padding: 0.85rem 1.75rem;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  background: var(--kid-surface-soft);
  color: var(--kid-text-primary);
  border: 1px solid var(--kid-border-strong);
  box-shadow: 0 16px 32px rgba(2, 6, 23, 0.45);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border 0.2s ease, background 0.2s ease;
}

.kid-button--primary {
  background: linear-gradient(135deg, #38bdf8, #2563eb);
  color: #f8fafc;
  border-color: rgba(56, 189, 248, 0.6);
  box-shadow: 0 18px 36px rgba(37, 99, 235, 0.45);
}

.kid-button--calm {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.85), rgba(236, 72, 153, 0.8));
  color: #f8fafc;
  border-color: rgba(232, 121, 249, 0.5);
  box-shadow: 0 18px 36px rgba(124, 58, 237, 0.45);
}

.kid-button:hover,
.kid-button:focus,
.kid-button:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 22px 44px rgba(2, 6, 23, 0.55);
  outline: none;
}

.kid-hero__companion {
  min-height: 240px;
  background:
    radial-gradient(circle at 20% 25%, rgba(125, 211, 252, 0.28), transparent 65%),
    radial-gradient(circle at 80% 35%, rgba(168, 85, 247, 0.24), transparent 70%),
    linear-gradient(145deg, rgba(59, 130, 246, 0.28), rgba(15, 118, 110, 0.18));
  border-radius: 32px;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--kid-border-soft);
  box-shadow: var(--kid-shadow);
}

.kid-hero__companion::after {
  content: '🦊';
  font-size: clamp(6rem, 18vw, 8rem);
  position: absolute;
  bottom: 12%;
  right: 16%;
}

.kid-quick-nav {
  max-width: 960px;
  margin: 0 auto 1.75rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  padding: 0 1.5rem;
}

.kid-quick-nav a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 0.75rem;
  text-decoration: none;
  font-weight: 700;
  color: var(--kid-text-primary);
  background: var(--kid-surface-soft);
  border-radius: 24px;
  border: 1px solid var(--kid-border-soft);
  box-shadow: 0 16px 30px rgba(2, 6, 23, 0.45);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.kid-quick-nav a span {
  font-size: 2rem;
}

.kid-quick-nav a:hover,
.kid-quick-nav a:focus,
.kid-quick-nav a:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 22px 44px rgba(2, 6, 23, 0.55);
  border-color: var(--kid-border-strong);
  outline: none;
}

.kid-section {
  max-width: 960px;
  margin: 0 auto;
  background: var(--kid-surface);
  border-radius: 32px;
  box-shadow: var(--kid-shadow);
  padding: clamp(1.75rem, 5vw, 2.5rem) clamp(1.5rem, 6vw, 2.5rem);
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  border: 1px solid var(--kid-border-strong);
}

.kid-section__header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.kid-section__title {
  margin: 0;
  font-size: 1.8rem;
  color: var(--kid-primary);
}

.kid-section__subtitle {
  margin: 0;
  font-size: 1rem;
  color: var(--kid-text-secondary);
}

.kid-path {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.kid-path__step {
  background: var(--kid-surface-soft);
  border-radius: 24px;
  padding: 1.25rem;
  border: 1px solid var(--kid-border-soft);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  box-shadow: 0 14px 30px rgba(2, 6, 23, 0.45);
}

.kid-path__emoji {
  font-size: 2rem;
}

.kid-path__title {
  margin: 0;
  font-size: 1.1rem;
  color: var(--kid-text-primary);
}

.kid-path__copy {
  margin: 0;
  font-size: 0.95rem;
  color: var(--kid-text-muted);
}

.kid-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.kid-card {
  background: linear-gradient(165deg, rgba(125, 211, 252, 0.22), rgba(17, 24, 39, 0.96));
  border-radius: 24px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border: 1px solid rgba(125, 211, 252, 0.4);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  box-shadow: 0 18px 36px rgba(2, 6, 23, 0.5);
}

.kid-card:nth-child(2) {
  background: linear-gradient(165deg, rgba(250, 204, 21, 0.18), rgba(17, 24, 39, 0.96));
  border-color: rgba(250, 204, 21, 0.45);
}

.kid-card:nth-child(3) {
  background: linear-gradient(165deg, rgba(52, 211, 153, 0.18), rgba(17, 24, 39, 0.96));
  border-color: rgba(52, 211, 153, 0.45);
}

.kid-card:nth-child(4) {
  background: linear-gradient(165deg, rgba(233, 213, 255, 0.18), rgba(17, 24, 39, 0.96));
  border-color: rgba(192, 132, 252, 0.4);
}

.kid-card__emoji {
  font-size: 2.4rem;
}

.kid-card__title {
  margin: 0;
  font-size: 1.3rem;
  color: var(--kid-text-primary);
}

.kid-card__copy {
  margin: 0;
  color: var(--kid-text-muted);
  font-size: 0.95rem;
}

.kid-card__cta {
  margin-top: auto;
  align-self: flex-start;
  text-decoration: none;
  font-weight: 700;
  color: var(--kid-text-primary);
  background: rgba(125, 211, 252, 0.12);
  border-radius: 999px;
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--kid-border-soft);
}

.kid-card:hover,
.kid-card:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 24px 48px rgba(2, 6, 23, 0.55);
  border-color: var(--kid-border-strong);
}

.kid-card__cta:hover,
.kid-card__cta:focus,
.kid-card__cta:focus-visible {
  background: rgba(125, 211, 252, 0.25);
  border-color: var(--kid-border-strong);
  outline: none;
}

.kid-support {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.kid-support__card {
  background: var(--kid-surface-soft);
  border-radius: 24px;
  padding: 1.5rem;
  border: 1px solid var(--kid-border-soft);
  box-shadow: 0 16px 32px rgba(2, 6, 23, 0.45);
}

.kid-support__title {
  margin: 0 0 0.5rem 0;
  font-size: 1.1rem;
  color: var(--kid-text-primary);
}

.kid-support__list {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--kid-text-muted);
}

.kid-support__list li {
  margin-bottom: 0.4rem;
}

/* Kid-friendly lessons browser adjustments */
.kid-mode .lessons-hero {
  background: transparent;
  padding: 1.5rem;
  border-radius: 24px;
  box-shadow: none;
  text-align: center;
}

.kid-mode .lessons-hero h1 {
  font-size: 2rem;
  color: var(--kid-primary);
}

.kid-mode .lessons-hero__details {
  justify-content: center;
  gap: 1.5rem;
}

.kid-mode .lessons-toolbar,
.kid-mode #filtersPanel,
.kid-mode #filtersOverlay,
.kid-mode #filtersSummary,
.kid-mode .lessons-support,
.kid-mode .solo-journey,
.kid-mode .course-map {
  display: none !important;
}

.kid-gate {
  text-align: center;
  padding: 1.25rem;
  background: var(--kid-surface-soft);
  color: var(--kid-text-secondary);
  border-radius: 20px;
  margin: 0 1.5rem 1.5rem;
  border: 1px dashed var(--kid-border-soft);
  box-shadow: 0 16px 32px rgba(2, 6, 23, 0.45);
}

.kid-gate__btn {
  margin-top: 0.75rem;
  background: none;
  border: none;
  font-weight: 700;
  color: var(--kid-primary);
  cursor: pointer;
}

.kid-show-filters .lessons-toolbar,
.kid-show-filters #filtersPanel,
.kid-show-filters .lessons-support {
  display: block !important;
}

.kid-mode .lessons-grid {
  gap: 1.25rem;
}

.kid-mode .lesson-card {
  border-radius: 24px;
  border: 1px solid var(--kid-border-strong);
  background: var(--kid-surface);
  box-shadow: var(--kid-shadow);
}

.kid-mode .lesson-card__header {
  font-size: 1.1rem;
  color: var(--kid-text-primary);
}

.kid-mode .lesson-card__meta,
.kid-mode .lesson-card__desc {
  font-size: 0.95rem;
  color: var(--kid-text-secondary);
}


.kid-lesson-tracks,
.kid-lesson-experiences {
  margin: 0 1.5rem 2rem;
  padding: 1.5rem;
  border-radius: 24px;
  border: 1px solid var(--kid-border-soft);
  background: var(--kid-surface-soft);
  box-shadow: 0 12px 28px rgba(2, 6, 23, 0.35);
}

.kid-lesson-tracks__intro,
.kid-lesson-experiences__intro {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 1.25rem;
}

.kid-lesson-tracks__intro h2,
.kid-lesson-experiences__intro h2 {
  margin: 0;
  font-size: 1.35rem;
  color: var(--kid-primary);
}

.kid-lesson-tracks__intro p,
.kid-lesson-experiences__intro p {
  margin: 0;
  color: var(--kid-text-muted);
  font-size: 0.95rem;
}

.kid-lesson-tracks__grid,
.kid-lesson-experiences__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.kid-lesson-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.25rem;
  border-radius: 20px;
  border: 1px solid rgba(125, 211, 252, 0.25);
  background: rgba(15, 23, 42, 0.82);
  color: var(--kid-text-primary);
  text-align: left;
  box-shadow: 0 10px 24px rgba(2, 6, 23, 0.35);
}

.kid-lesson-card__emoji {
  font-size: 2rem;
}

.kid-lesson-card__title {
  margin: 0;
  font-size: 1.15rem;
  color: var(--kid-text-primary);
}

.kid-lesson-card__copy {
  margin: 0;
  color: var(--kid-text-muted);
  font-size: 0.95rem;
}

.kid-lesson-card__cta {
  margin-top: auto;
  align-self: flex-start;
  font-weight: 700;
  text-decoration: none;
  color: var(--kid-secondary);
}

.kid-lesson-card__cta:focus,
.kid-lesson-card__cta:hover {
  text-decoration: underline;
}

.kid-lesson-card--experience {
  border-color: rgba(250, 204, 21, 0.28);
  background: rgba(30, 41, 59, 0.88);
}

.kid-lesson-routine {
  margin: 0 1.5rem 2rem;
  background: rgba(34, 197, 94, 0.16);
  border-radius: 24px;
  border: 1px solid rgba(34, 197, 94, 0.35);
  padding: 1.5rem;
  box-shadow: 0 10px 24px rgba(2, 6, 23, 0.35);
}

.kid-lesson-routine h2 {
  margin-top: 0;
  font-size: 1.3rem;
  color: #34d399;
}

.kid-lesson-routine__steps {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0 0;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.kid-lesson-routine__steps li {
  background: rgba(15, 23, 42, 0.78);
  border-radius: 18px;
  padding: 0.75rem 1rem;
  font-weight: 600;
  color: var(--kid-text-primary);
}

.kid-mode .lesson-header {
  background: transparent;
  box-shadow: none;
  text-align: center;
  padding: 1.5rem 1rem 1rem;
}

.kid-mode .lesson-header__title {
  font-size: 2.1rem;
  color: var(--kid-primary);
}

.kid-mode .lesson-header__subtitle {
  font-size: 1rem;
  color: var(--kid-text-secondary);
}

.kid-lesson-overview {
  margin: 0 auto;
  max-width: 880px;
  padding: 1.5rem;
  background: var(--kid-surface);
  border-radius: 28px;
  box-shadow: var(--kid-shadow);
  border: 1px solid var(--kid-border-strong);
}

.kid-lesson-overview__steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin: 1rem 0 0 0;
}

.kid-lesson-overview__step {
  background: rgba(52, 211, 153, 0.14);
  border-radius: 20px;
  padding: 1rem;
  font-weight: 600;
  color: var(--kid-text-primary);
  border: 1px solid rgba(52, 211, 153, 0.35);
}

.kid-mode .lesson-progress {
  background: var(--kid-surface);
  margin: 1.5rem auto;
  border-radius: 20px;
  padding: 1rem 1.25rem;
  max-width: 880px;
  box-shadow: 0 16px 30px rgba(2, 6, 23, 0.45);
  border: 1px solid var(--kid-border-strong);
}

.kid-mode .activity-actions {
  padding: 1rem 1.25rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.kid-mode .activity-actions .btn {
  font-size: 1.1rem;
  padding: 0.9rem 1.5rem;
  border-radius: 18px;
}

.kid-celebration {
  max-width: 880px;
  margin: 2rem auto;
  background: var(--kid-surface);
  border-radius: 28px;
  padding: 1.5rem;
  box-shadow: var(--kid-shadow);
  text-align: center;
  border: 1px solid var(--kid-border-strong);
}

.kid-celebration h2 {
  margin: 0 0 0.5rem 0;
  color: var(--kid-primary);
}

.kid-celebration p {
  margin: 0.25rem 0;
  color: var(--kid-text-secondary);
}

.kid-lesson-overview__list {
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.75rem;
  color: var(--kid-text-secondary);
  font-weight: 600;
}

.kid-lesson-overview__list li {
  background: rgba(30, 64, 175, 0.35);
  border-radius: 18px;
  padding: 0.85rem 1rem;
  box-shadow: 0 12px 30px rgba(2, 6, 23, 0.45);
}

.kid-lesson-playpacks {
  margin: 0 1.5rem 2rem;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.25), rgba(147, 197, 253, 0.18));
  border-radius: 28px;
  border: 1px solid rgba(59, 130, 246, 0.35);
  padding: 1.75rem 1.5rem 1.5rem;
  box-shadow: 0 18px 36px rgba(2, 6, 23, 0.45);
}

.kid-lesson-playpacks__header h2 {
  margin: 0;
  font-size: 1.5rem;
  color: #93c5fd;
}

.kid-lesson-playpacks__header p {
  margin: 0.5rem 0 0;
  color: var(--kid-text-secondary);
}

.kid-lesson-playpacks__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.kid-lesson-playpack {
  background: rgba(15, 23, 42, 0.75);
  border-radius: 22px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  border: 1px solid rgba(147, 197, 253, 0.35);
}

.kid-lesson-playpack__title {
  margin: 0;
  font-size: 1.2rem;
  color: var(--kid-text-primary);
}

.kid-lesson-playpack__steps {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--kid-text-muted);
  display: grid;
  gap: 0.5rem;
}

.kid-lesson-playpack__cta {
  margin-top: auto;
  align-self: flex-start;
  color: #bfdbfe;
  font-weight: 700;
  text-decoration: none;
}

@media (max-width: 768px) {
  .kid-hero__content {
    padding: 1.75rem;
  }

  .kid-hero__actions {
    flex-direction: column;
  }

  .kid-button {
    width: 100%;
  }

  .kid-quick-nav {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  }

  .kid-section {
    border-radius: 24px;
    padding: 1.75rem 1.25rem;
  }

  .kid-card-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }

  .kid-mode .app-header__nav {
    overflow-x: auto;
    width: 100%;
  }

  .kid-mode .app-header__nav::-webkit-scrollbar {
    display: none;
  }

  .kid-mode .activity-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .kid-mode .activity-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .kid-lesson-tracks,
  .kid-lesson-experiences,
  .kid-lesson-routine {
    margin: 0 1rem 1.5rem;
    padding: 1.25rem;
  }

  .kid-lesson-tracks__grid,
  .kid-lesson-experiences__grid {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  }

  .kid-lesson-card {
    padding: 1rem;
  }
}

@media (max-width: 600px) {
  .page--landing .page__main {
    padding: 1.5rem 1rem 2.5rem;
  }

  .kid-mode .app-header {
    padding: 0.75rem 0 0.5rem;
  }

  .kid-mode .app-header__container {
    grid-template-columns: 1fr;
    padding: 0.75rem 1rem;
    gap: 0.75rem;
  }

  .kid-mode .app-header__brand {
    width: 100%;
    justify-content: space-between;
    gap: 0.5rem;
  }

  .kid-mode .app-header__logo-link {
    flex: 1;
    min-width: 0;
  }

  .kid-mode .app-header__text {
    gap: 0.25rem;
  }

  .kid-mode .app-header__title {
    font-size: 1.25rem;
  }

  .kid-mode .app-header__subtitle {
    font-size: 0.65rem;
    letter-spacing: 0.12em;
  }

  .kid-mode .app-header__nav {
    justify-content: flex-start;
    padding: 0.5rem 0.75rem;
    margin: 0;
    border-radius: 20px;
    gap: 0.65rem;
  }

  .kid-mode .app-header__link {
    font-size: 0.85rem;
    padding: 0.35rem 0.65rem;
  }

  .kid-hero {
    grid-template-columns: 1fr;
    padding: 1.5rem 1rem 1rem;
    gap: 1.25rem;
  }

  .kid-hero__content {
    border-radius: 24px;
    padding: 1.5rem;
    gap: 1rem;
  }

  .kid-hero__title {
    font-size: 1.9rem;
  }

  .kid-hero__subtitle {
    font-size: 0.95rem;
  }

  .kid-hero__actions {
    gap: 0.75rem;
  }

  .kid-button {
    font-size: 1rem;
  }

  .kid-hero__companion {
    border-radius: 24px;
    min-height: 200px;
  }

  .kid-quick-nav {
    display: flex;
    overflow-x: auto;
    margin: 0 0 1.5rem;
    padding: 0 1rem 0.5rem;
    gap: 0.75rem;
    scroll-snap-type: x proximity;
  }

  .kid-quick-nav a {
    flex: 0 0 140px;
    border-radius: 20px;
    padding: 0.85rem 0.75rem;
    scroll-snap-align: center;
  }

  .kid-quick-nav::-webkit-scrollbar {
    display: none;
  }

  .kid-section {
    margin: 0 1rem 1.75rem;
    padding: 1.5rem 1.25rem;
    border-radius: 24px;
    gap: 1.25rem;
  }

  .kid-section__title {
    font-size: 1.5rem;
  }

  .kid-section__subtitle {
    font-size: 0.95rem;
  }

  .kid-path {
    grid-template-columns: 1fr;
    gap: 0.85rem;
  }

  .kid-card-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .kid-card {
    border-radius: 24px;
    padding: 1.1rem;
  }

  .kid-card__title {
    font-size: 1.25rem;
  }

  .kid-card__copy {
    font-size: 0.95rem;
  }
}

/* Lesson mode toggles */
.lesson-mode {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.lesson-mode__btn {
  border: 1px solid var(--color-primary-300);
  background: transparent;
  color: var(--color-primary-200);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-right: 0.5rem;
}

.lesson-mode__btn--active {
  background: var(--color-primary-400);
  color: #0b1120;
  border-color: var(--color-primary-400);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}

.lesson-mode__description {
  flex-basis: 100%;
  max-width: 48rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.lesson-connections {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.lesson-connections__grid {
  display: grid;
  gap: var(--spacing-md);
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
}

.lesson-connections__grid ul {
  padding-left: 1rem;
  margin: 0;
  list-style: disc;
}

.lesson-accessibility {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: rgba(15, 23, 42, 0.6);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.2);
}

.lesson-accessibility__controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.lesson-accessibility__transcript {
  max-height: 18rem;
  overflow-y: auto;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  background: rgba(15, 23, 42, 0.35);
  border: 1px solid rgba(148, 163, 184, 0.2);
}

body.lesson--simplified-reading .lesson-details,
body.lesson--simplified-reading .activity-page {
  font-size: 1.05rem;
  line-height: 1.7;
}

body.lesson--dyslexia-font {
  font-family: 'OpenDyslexic', 'Atkinson Hyperlegible', 'Lexend', Arial, sans-serif;
}

body.lesson--dyslexia-font .btn {
  font-family: inherit;
}

/* Adaptive coach */
#adaptiveCoachCard {
  background: rgba(15, 23, 42, 0.65);
}

.adaptive-coach__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.adaptive-coach__item {
  display: grid;
  grid-template-columns: minmax(5rem, 6rem) 1fr auto;
  gap: var(--spacing-md);
  align-items: center;
  padding: var(--spacing-md);
  background: rgba(30, 64, 175, 0.18);
  border: 1px solid rgba(99, 102, 241, 0.35);
  border-radius: var(--radius-lg);
}

.adaptive-coach__badge {
  font-weight: 600;
  color: var(--color-primary-200);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.adaptive-coach__body h3 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
}

.adaptive-coach__body p {
  margin: 0;
  font-size: 0.9rem;
  color: rgba(226, 232, 240, 0.9);
}

.adaptive-coach__note {
  margin-top: 0.35rem;
  font-style: italic;
  color: rgba(165, 180, 252, 0.9);
}

.adaptive-coach__actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.adaptive-coach__actions .btn {
  white-space: nowrap;
}

@media (max-width: 720px) {
  .adaptive-coach__item {
    grid-template-columns: 1fr;
  }
  .adaptive-coach__actions {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: flex-start;
  }
}


.family-tools {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: var(--spacing-lg);
}

.family-tools__title {
  margin-bottom: var(--spacing-sm);
  font-size: 0.95rem;
  color: var(--color-primary-100);
}

.family-tools__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.family-tools__list li {
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md);
  background: rgba(148, 163, 184, 0.08);
  border: 1px solid rgba(148, 163, 184, 0.15);
  font-size: 0.9rem;
}

.family-tools__list li.is-alert {
  border-color: rgba(248, 113, 113, 0.55);
  background: rgba(248, 113, 113, 0.12);
}

.family-tools__column .btn {
  margin-top: 0.35rem;
  width: 100%;
}


.lesson-feedback {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: rgba(30, 64, 175, 0.15);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(99, 102, 241, 0.25);
}

.lesson-feedback ul {
  margin: var(--spacing-sm) 0 0;
  padding-left: 1rem;
  list-style: disc;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.lesson-feedback li {
  font-size: 0.9rem;
}

/* Placement coach */
.placement-form {
  display: grid;
  gap: var(--space-xl, 2rem);
}

.placement-form__group {
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: var(--radius-lg, 0.5rem);
  padding: var(--space-lg, 1.5rem);
  background: var(--color-surface-elevated, rgba(17, 24, 39, 0.85));
  display: grid;
  gap: var(--space-md, 1rem);
}

.placement-form__group legend {
  font-size: 1.05rem;
  font-weight: var(--font-semibold, 600);
  color: var(--color-text-primary, #f8fafc);
  margin-bottom: var(--space-sm, 0.5rem);
}

.placement-form__hint {
  color: rgba(226, 232, 240, 0.75);
  margin: 0;
  font-size: 0.95rem;
}

.placement-form__option {
  display: flex;
  gap: var(--space-md, 1rem);
  align-items: flex-start;
  padding: var(--space-sm, 0.5rem) var(--space-md, 1rem);
  border-radius: var(--radius-md, 0.375rem);
  transition: background 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
}

.placement-form__option:hover,
.placement-form__option:focus-within {
  background: rgba(59, 130, 246, 0.08);
}

.placement-form__option input[type='radio'] {
  margin-top: 0.25rem;
}

.placement-form__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md, 1rem);
  justify-content: flex-start;
}

.placement-results {
  display: grid;
  gap: var(--space-xl, 2rem);
}

.placement-results__summary {
  display: grid;
  gap: var(--space-xs, 0.25rem);
  padding: var(--space-lg, 1.5rem);
  border-radius: var(--radius-lg, 0.5rem);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.25), rgba(14, 116, 144, 0.25));
}

.placement-results__level {
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  font-weight: var(--font-semibold, 600);
  margin: 0;
}

.placement-results__phase,
.placement-results__cefr {
  margin: 0;
  color: rgba(226, 232, 240, 0.75);
}

.placement-results__details h3,
.placement-results__pacing h3 {
  margin-top: 0;
  font-size: 1.05rem;
}

.placement-results__list {
  display: grid;
  gap: var(--space-sm, 0.5rem);
  padding-left: 1rem;
}

.placement-results__pacing {
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: var(--radius-lg, 0.5rem);
  padding: var(--space-lg, 1.5rem);
  background: var(--color-surface-elevated, rgba(17, 24, 39, 0.85));
}

.placement-results__pacing p {
  margin: 0;
  color: rgba(226, 232, 240, 0.9);
}

.placement-results__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md, 1rem);
}

@media (min-width: 640px) {
  .placement-form {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }

  .placement-form__group {
    min-height: 100%;
  }

  .placement-results {
    grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
    align-items: start;
  }

  .placement-results__summary {
    grid-column: span 2;
  }
}

@media (max-width: 520px) {
  .placement-form__actions {
    flex-direction: column;
  }

  .placement-form__actions .btn {
    width: 100%;
    justify-content: center;
  }
}

/* Scope & sequence spotlight */
.scope-sequence {
  display: grid;
  gap: var(--space-xl, 2rem);
}

.scope-sequence__summary {
  display: grid;
  gap: var(--space-xs, 0.25rem);
  padding: var(--space-lg, 1.5rem);
  background: linear-gradient(160deg, rgba(59, 130, 246, 0.2), rgba(99, 102, 241, 0.18));
  border-radius: var(--radius-lg, 0.5rem);
}

.scope-sequence__grade {
  font-size: clamp(1.05rem, 3vw, 1.35rem);
  font-weight: var(--font-semibold, 600);
  margin: 0;
}

.scope-sequence__phase,
.scope-sequence__cefr {
  margin: 0;
  color: rgba(226, 232, 240, 0.75);
}

.scope-sequence__grid {
  display: grid;
  gap: var(--space-lg, 1.5rem);
}

.scope-sequence__column {
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: var(--radius-lg, 0.5rem);
  padding: var(--space-lg, 1.5rem);
  background: var(--color-surface-elevated, rgba(17, 24, 39, 0.85));
  display: grid;
  gap: var(--space-sm, 0.5rem);
}

.scope-sequence__column h3 {
  margin: 0;
  font-size: 1.05rem;
}

.scope-sequence__column ul {
  margin: 0;
  padding-left: 1rem;
  display: grid;
  gap: var(--space-xs, 0.25rem);
}

.scope-sequence__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md, 1rem);
}

@media (min-width: 768px) {
  .scope-sequence__grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }
}

@media (max-width: 520px) {
  .scope-sequence__actions {
    flex-direction: column;
  }

  .scope-sequence__actions .btn {
    width: 100%;
    justify-content: center;
  }
}