/*
 * /definition/styles.css
 * Styles pour la page définition de la polycrise
 * 
 * Version : 2.3 (CORRECTIONS CHEVAUCHEMENTS MOBILE)
 * Dernière mise à jour : Janvier 2025
 * 
 * ✅ CORRECTIONS v2.3 :
 * - Line-height ajouté sur tous les paragraphes (1.7 desktop, 1.75 mobile)
 * - Margins quote-box symétriques mobile (2rem 0)
 * - H3/H4 margin-top réduits mobile (1.5rem / 1.25rem)
 * - Citation-box line-height amélioré (1.65 desktop, 1.7 mobile)
 * - Très petit mobile optimisé (line-height 1.8)
 * 
 * Structure :
 * 0. Variables CSS
 * 1. Loading screen
 * 2. Canvas animation 3D
 * 3. Body et structure générale
 * 4. Main content (glassmorphism)
 * 5. Hero section
 * 6. Tabs container
 * 7. Quote box et Citation box
 * 8. Buttons
 * 9. Sticky notice
 * 10. Backgrounds (Tailwind overrides)
 * 11. Utilities
 * 12. Loading animations
 * 13. Transitions fluides
 * 14. Fade in animations
 * 15. Navigation avancée (sommaire + progression + TOC)
 * 16. Section crédits (CC BY 4.0)
 * 17. Responsive mobile
 */

/* ============================================
   0. VARIABLES CSS
   ============================================ */
:root {
  /* Couleurs principales */
  --color-primary: #3b82f6;
  --color-primary-dark: #2563eb;
  --color-primary-darker: #1d4ed8;
  --color-success: #10b981;
  --color-blue-50: #eff6ff;
  --color-blue-100: #dbeafe;
  --color-blue-400: #60a5fa;
  --color-blue-600: #2563eb;
  --color-blue-700: #1e40af;
  --color-blue-800: #1e3a8a;
  --color-indigo-50: #eef2ff;
  
  /* Couleurs grises */
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-600: #6b7280;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #0f172a;
  
  /* Couleurs supplémentaires */
  --color-slate-200: #cbd5e1;
  --color-slate-800: #0f172a;
  --color-red-600: #ef4444;
  
  /* Opacités glassmorphism */
  --opacity-glass-light: 0.65;
  --opacity-glass-medium: 0.70;
  --opacity-glass-strong: 0.75;
  --opacity-glass-mobile: 0.85;
  --opacity-glass-mobile-strong: 0.90;
  
  /* Blur amounts */
  --blur-light: 4px;
  --blur-medium: 6px;
  --blur-strong: 8px;
  --blur-extra: 10px;
  --blur-max: 12px;
  
  /* Transitions */
  --transition-fast: 0.2s;
  --transition-base: 0.3s;
  --transition-slow: 0.5s;
  --transition-slower: 0.6s;
  --transition-timing: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-ease-out: ease-out;
  --transition-ease-in: ease-in;
  --transition-ease-in-out: ease-in-out;
  
  /* Z-index */
  --z-background: -1;
  --z-content: 1;
  --z-tabs: 100;
  --z-back-to-top: 9997;
  --z-sticky-notice: 9998;
  --z-loading: 99999;
  
  /* Espacements */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border radius */
  --radius-sm: 0.25rem;
  --radius-base: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-base: 0 4px 6px rgba(37, 99, 235, 0.3);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 6px 20px rgba(37, 99, 235, 0.5);
  --shadow-top: 0 -2px 10px rgba(0, 0, 0, 0.1);
  
  /* Header heights */
  --header-height: 72px;
  --header-mobile: 60px;
  --tab-list-height: 60px;
  
  /* Scroll offsets */
  --scroll-offset: 150px;
  --scroll-threshold: 50px;
  
  /* TOC dimensions */
  --toc-height-desktop: 400px;
  --toc-height-mobile: 250px;
  --scrollbar-width: 8px;
  --scrollbar-width-mobile: 6px;
}

/* ============================================
   1. LOADING SCREEN
   ============================================ */
#loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: var(--z-loading);
  transition: opacity var(--transition-slow) var(--transition-ease-out);
}

#loading-screen.hidden {
  opacity: 0;
  pointer-events: none;
}

.loading-spinner {
  width: 60px;
  height: 60px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
}

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

.loading-text {
  color: white;
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: var(--spacing-lg);
  animation: pulse 2s var(--transition-timing) infinite;
}

/* ============================================
   2. CANVAS ANIMATION 3D
   ============================================ */
#background-graph {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  z-index: var(--z-background) !important;
  pointer-events: none !important;
  opacity: 1.0 !important;
}

/* ============================================
   3. BODY ET STRUCTURE GÉNÉRALE
   ============================================ */
body {
  background: var(--color-gray-50) !important;
  overflow-x: hidden;
}

body > *:not(canvas):not(#header-container):not(#loading-screen) {
  position: relative;
  z-index: auto;
}

body.loading main,
body.loading #header-container,
body.loading #footer-container {
  opacity: 0;
}

body:not(.loading) main,
body:not(.loading) #header-container,
body:not(.loading) #footer-container {
  opacity: 1;
  transition: opacity var(--transition-slow) var(--transition-ease-in);
}

/* ============================================
   4. MAIN CONTENT - GLASSMORPHISM
   ============================================ */
main {
  position: relative !important;
  z-index: var(--z-content) !important;
  background: transparent !important;
}

main > section {
  position: relative !important;
  background: rgba(255, 255, 255, var(--opacity-glass-light)) !important;
  backdrop-filter: blur(var(--blur-extra)) saturate(180%) !important;
  -webkit-backdrop-filter: blur(var(--blur-extra)) saturate(180%) !important;
}

/* Text shadow pour meilleur contraste */
main h1,
main h2,
main h3,
main h4,
main p,
main li {
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.8);
}

/* ============================================
   5. HERO SECTION
   ============================================ */
.hero-section {
  background: linear-gradient(
    to bottom, 
    rgba(37, 99, 235, var(--opacity-glass-medium)),
    rgba(37, 99, 235, 0.78)
  ) !important;
  backdrop-filter: blur(var(--blur-max)) !important;
  -webkit-backdrop-filter: blur(var(--blur-max)) !important;
  position: relative;
}

.hero-section h1 {
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* ============================================
   6. TABS CONTAINER
   ============================================ */
.tabs-container {
  background: rgba(255, 255, 255, var(--opacity-glass-strong)) !important;
  backdrop-filter: blur(var(--blur-extra)) saturate(180%) !important;
  -webkit-backdrop-filter: blur(var(--blur-extra)) saturate(180%) !important;
  position: sticky;
  top: var(--header-height);
  z-index: var(--z-tabs);
  transition: box-shadow var(--transition-base);
}

.tabs-container.scrolled {
  box-shadow: var(--shadow-lg);
}

.tab-list {
  display: flex;
  border-bottom: 2px solid var(--color-gray-200);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.tab-list::-webkit-scrollbar {
  height: 4px;
}

.tab-list::-webkit-scrollbar-thumb {
  background: var(--color-slate-200);
  border-radius: 2px;
}

.tab-button {
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--color-gray-600);
  font-weight: 600;
  font-size: 1rem;
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.tab-button:hover:not([aria-selected="true"]) {
  color: var(--color-gray-700);
  background: rgba(59, 130, 246, 0.05);
}

.tab-button[aria-selected="true"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  background: rgba(59, 130, 246, 0.05);
}

.tab-button:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
  z-index: 1;
}

.tab-panel {
  display: none;
  padding: var(--spacing-xl) 0;
  animation: fadeIn var(--transition-base) var(--transition-ease-in);
}

.tab-panel[aria-hidden="false"] {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   7. QUOTE BOX ET CITATION BOX
   ============================================ */
.quote-box {
  border-left: 4px solid var(--color-primary);
  background: linear-gradient(to right, rgba(59, 130, 246, 0.08), transparent) !important;
  backdrop-filter: blur(var(--blur-light)) !important;
  -webkit-backdrop-filter: blur(var(--blur-light)) !important;
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  border-radius: var(--radius-md);
  position: relative;
  isolation: isolate;
}

.citation-box {
  background: rgba(248, 250, 252, var(--opacity-glass-strong)) !important;
  backdrop-filter: blur(var(--blur-medium)) !important;
  -webkit-backdrop-filter: blur(var(--blur-medium)) !important;
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  font-family: 'Courier New', monospace;
  font-size: 0.875rem;
  margin: var(--spacing-md) 0;
  line-height: 1.65; /* ✅ AJOUT v2.3 - Améliore lisibilité */
  position: relative;
  isolation: isolate;
}

/* ============================================
   8. BUTTONS
   ============================================ */
.copy-btn {
  background: var(--color-primary);
  color: white;
  padding: var(--spacing-xs) var(--spacing-md);
  border: none;
  border-radius: var(--radius-base);
  cursor: pointer;
  font-weight: 600;
  transition: all var(--transition-fast);
  font-size: 0.875rem;
}

.copy-btn:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-base);
}

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

.copy-btn.copied {
  background: var(--color-success);
}

/* ============================================
   9. STICKY NOTICE
   ============================================ */
.sticky-notice {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(15, 23, 42, 0.95) !important;
  backdrop-filter: blur(var(--blur-extra)) !important;
  -webkit-backdrop-filter: blur(var(--blur-extra)) !important;
  color: white;
  padding: var(--spacing-sm);
  text-align: center;
  font-size: 0.875rem;
  z-index: var(--z-sticky-notice);
  box-shadow: var(--shadow-top);
}

.sticky-notice a {
  color: var(--color-blue-400);
  text-decoration: underline;
}

.sticky-notice a:hover {
  color: #93c5fd;
}

/* ============================================
   10. BACKGROUNDS (TAILWIND OVERRIDE)
   ============================================ */
.bg-white,
section.bg-white,
div.bg-white {
  background: rgba(255, 255, 255, var(--opacity-glass-medium)) !important;
  backdrop-filter: blur(var(--blur-strong)) !important;
  -webkit-backdrop-filter: blur(var(--blur-strong)) !important;
}

.bg-gray-50,
section.bg-gray-50,
div.bg-gray-50 {
  background: rgba(249, 250, 251, var(--opacity-glass-medium)) !important;
  backdrop-filter: blur(var(--blur-strong)) !important;
  -webkit-backdrop-filter: blur(var(--blur-strong)) !important;
}

.bg-blue-50 {
  background: rgba(239, 246, 255, var(--opacity-glass-medium)) !important;
  backdrop-filter: blur(var(--blur-medium)) !important;
  -webkit-backdrop-filter: blur(var(--blur-medium)) !important;
}

.bg-gradient-to-r.from-blue-50.to-indigo-50,
.bg-gradient-to-b.from-white.to-gray-50 {
  background: linear-gradient(
    to right, 
    rgba(239, 246, 255, var(--opacity-glass-medium)), 
    rgba(238, 242, 255, var(--opacity-glass-medium))
  ) !important;
  backdrop-filter: blur(var(--blur-medium)) !important;
  -webkit-backdrop-filter: blur(var(--blur-medium)) !important;
}

/* ============================================
   11. UTILITIES
   ============================================ */
.section-separator {
  text-align: center;
  padding: var(--spacing-lg) 0;
  color: var(--color-gray-600);
  font-style: italic;
  font-size: 0.875rem;
}

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

.prose {
  max-width: none;
}

.prose p {
  margin-bottom: var(--spacing-md);
  line-height: 1.7; /* ✅ AJOUT v2.3 - Espace suffisant entre lignes */
}

.prose h3 {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.prose h4 {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   12. LOADING ANIMATION
   ============================================ */
.partial-loading {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 60px;
  color: var(--color-gray-400);
}

.partial-loading::after {
  content: "Chargement...";
  animation: pulse 2s var(--transition-timing) infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ============================================
   13. TRANSITIONS FLUIDES
   ============================================ */
main,
main > section,
.tabs-container,
.hero-section {
  transition: 
    opacity var(--transition-base) var(--transition-ease-in-out),
    background var(--transition-base) var(--transition-ease-in-out) !important;
}

/* ============================================
   14. FADE IN ANIMATION
   ============================================ */
body:not(.loading) main {
  animation: fadeInContent var(--transition-slower) var(--transition-ease-in-out);
}

@keyframes fadeInContent {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   15. NAVIGATION AVANCÉE
   ============================================ */

/* ───────────────────────────────────────────
   15.1 Reading Progress Bar
   ─────────────────────────────────────────── */
#reading-progress {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  background: rgba(249, 250, 251, 0.9);
  backdrop-filter: blur(var(--blur-strong));
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-gray-200);
}

.progress-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.progress-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-gray-700);
  min-width: 85px;
}

.progress-bar-bg {
  flex: 1;
  height: 8px;
  background: var(--color-gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

#progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  transition: width var(--transition-base) var(--transition-ease-out);
  position: relative;
}

#progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.3) 50%, transparent 100%);
  animation: shimmer 2s infinite;
}

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

#progress-text {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  font-weight: 600;
  min-width: 40px;
  text-align: right;
}

/* ───────────────────────────────────────────
   15.2 Table of Contents (TOC)
   ─────────────────────────────────────────── */

/* TOC Container */
#toc-container {
  background: rgba(239, 246, 255, var(--opacity-glass-medium));
  backdrop-filter: blur(var(--blur-medium));
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
}

/* TOC Summary (cliquable) */
#toc-container summary {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-blue-700);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  user-select: none;
  transition: all var(--transition-fast);
  padding: var(--spacing-xs);
  border-radius: var(--radius-base);
}

#toc-container summary:hover {
  color: var(--color-blue-800);
  background: rgba(59, 130, 246, 0.08);
}

#toc-container summary::marker {
  display: none;
}

#toc-container summary::before {
  content: '📖';
  font-size: 1.125rem;
  transition: transform var(--transition-fast);
}

#toc-container[open] summary::before {
  transform: rotate(0deg);
}

#toc-container:not([open]) summary::before {
  opacity: 0.7;
}

#toc-container summary::after {
  content: '▼';
  font-size: 0.75rem;
  margin-left: auto;
  transition: transform var(--transition-fast);
  color: var(--color-primary);
}

#toc-container[open] summary::after {
  transform: rotate(180deg);
}

/* TOC List scrollable */
#toc-list {
  margin-top: var(--spacing-sm);
  max-height: var(--toc-height-desktop);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: #93c5fd var(--color-blue-100);
}

#toc-list::-webkit-scrollbar {
  width: var(--scrollbar-width);
}

#toc-list::-webkit-scrollbar-track {
  background: var(--color-blue-100);
  border-radius: 3px;
}

#toc-list::-webkit-scrollbar-thumb {
  background: #93c5fd;
  border-radius: 3px;
}

#toc-list::-webkit-scrollbar-thumb:hover {
  background: var(--color-blue-400);
}

/* TOC Items */
#toc-list li {
  list-style: none;
}

#toc-list a {
  display: block;
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--color-gray-700);
  border-left: 3px solid transparent;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  font-size: 0.875rem;
  line-height: 1.4;
}

#toc-list a:hover {
  color: var(--color-primary-dark);
  border-left-color: var(--color-primary);
  background: rgba(59, 130, 246, 0.08);
  transform: translateX(2px);
}

#toc-list a.active {
  color: var(--color-primary-dark);
  font-weight: 600;
  border-left-color: var(--color-primary-dark);
  background: rgba(59, 130, 246, 0.12);
}

/* TOC H4 (sous-sections, indentées) */
#toc-list a[data-level="h4"] {
  padding-left: var(--spacing-lg);
  font-size: 0.8125rem;
  color: var(--color-gray-600);
}

#toc-list a[data-level="h4"]:hover {
  color: var(--color-primary);
}

/* ───────────────────────────────────────────
   15.3 Scroll Behavior
   ─────────────────────────────────────────── */
h3, h4 {
  scroll-margin-top: var(--scroll-offset);
}

h3:target, h4:target {
  animation: highlight-section 2s var(--transition-ease-out);
}

@keyframes highlight-section {
  0% {
    background-color: rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-xs);
  }
  100% {
    background-color: transparent;
    border-radius: 0;
    padding: 0;
  }
}

/* ───────────────────────────────────────────
   15.4 Tab Navigation (Précédent/Suivant)
   ─────────────────────────────────────────── */
.tab-navigation {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 2px solid var(--color-gray-200);
  gap: var(--spacing-md);
}

.tab-nav-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.875rem 1.75rem;
  background: white;
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  font-weight: 600;
  color: var(--color-gray-700);
  transition: all 0.25s var(--transition-timing);
  cursor: pointer;
  font-size: 0.9375rem;
  box-shadow: var(--shadow-sm);
}

.tab-nav-btn:hover:not(:disabled) {
  background: var(--color-gray-50);
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(59, 130, 246, 0.2);
}

.tab-nav-btn:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 4px rgba(59, 130, 246, 0.2);
}

.tab-nav-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.tab-nav-btn svg {
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.tab-nav-btn.next:hover:not(:disabled) svg {
  transform: translateX(4px);
}

.tab-nav-btn.prev:hover:not(:disabled) svg {
  transform: translateX(-4px);
}

.tab-position {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  text-align: center;
}

.tab-position strong {
  color: var(--color-primary-dark);
  font-weight: 700;
}

/* ───────────────────────────────────────────
   15.5 Back to Top Button
   ─────────────────────────────────────────── */
.back-to-top-btn {
  position: fixed;
  bottom: 5rem;
  right: 2rem;
  width: 3.5rem;
  height: 3.5rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
  transition: all var(--transition-base) var(--transition-timing);
  z-index: var(--z-back-to-top);
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
}

.back-to-top-btn.visible {
  display: flex;
  opacity: 1;
}

.back-to-top-btn:hover {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary-darker) 100%);
  transform: translateY(-4px) scale(1.05);
  box-shadow: var(--shadow-xl);
}

.back-to-top-btn:active {
  transform: translateY(-2px) scale(1.02);
}

.back-to-top-btn svg {
  transition: transform var(--transition-base);
}

.back-to-top-btn:hover svg {
  transform: translateY(-2px);
}

/* ============================================
   16. SECTION CRÉDITS - CC BY 4.0
   ============================================ */

#credits {
  background: white;
  border-top: 1px solid var(--color-gray-200);
  padding: 2.5rem 0;
}

#credits h2 {
  color: var(--color-gray-700);
  font-size: 1.125rem;
  font-weight: 600;
  border-bottom: 1px solid var(--color-gray-200);
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
}

#credits h3 {
  color: var(--color-gray-700);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

/* Licence CC - Image */
#credits .flex.items-start img {
  flex-shrink: 0;
  width: 80px;
  height: auto;
}

/* Citation box */
#credits .bg-gray-50 {
  background: #f9fafb;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
}

#credits .font-mono {
  font-family: 'Courier New', monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-gray-800);
}

/* Bouton copie - Override styles généraux */
#credits button {
  background: white;
  border: 1px solid var(--color-gray-300);
  color: var(--color-gray-700);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

#credits button:hover {
  background: var(--color-gray-50);
}

#credits button:focus {
  outline: 2px solid var(--color-gray-400);
  outline-offset: 2px;
}

/* Confirmation copie */
#copy-confirmation {
  transition: opacity var(--transition-base);
}

/* Details/Summary */
#credits details summary {
  cursor: pointer;
  user-select: none;
  transition: color var(--transition-fast);
}

#credits details summary:hover {
  color: var(--color-gray-800);
}

#credits details[open] summary {
  margin-bottom: 0.75rem;
}

/* Metadata grid */
#credits dl {
  display: grid;
}

#credits dt {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-600);
  margin-bottom: 0.25rem;
}

#credits dd {
  color: var(--color-gray-800);
}

/* Liens dans #credits */
#credits a {
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

#credits a:hover {
  color: var(--color-primary-dark);
}

/* Footer discret */
#credits .border-t.border-gray-100 {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-gray-100);
}

/* ============================================
   17. RESPONSIVE MOBILE
   ============================================ */
@media (max-width: 768px) {
  /* ───────────────────────────────────────────
     17.1 Variables mobile
     ─────────────────────────────────────────── */
  :root {
    --header-height: var(--header-mobile);
  }
  
  /* ───────────────────────────────────────────
     17.2 Tabs
     ─────────────────────────────────────────── */
  .tab-button {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
  }
  
  .tab-panel {
    padding: var(--spacing-lg) 0;
  }
  
  .tabs-container {
    background: rgba(255, 255, 255, var(--opacity-glass-mobile-strong)) !important;
    top: var(--header-mobile);
    max-height: calc(100vh - var(--header-mobile));
  }
  
  /* ───────────────────────────────────────────
     17.3 Sticky notice
     ─────────────────────────────────────────── */
  .sticky-notice {
    font-size: 0.75rem;
    padding: var(--spacing-xs);
  }

  /* ───────────────────────────────────────────
     17.4 Canvas et sections
     ─────────────────────────────────────────── */
  #background-graph {
    opacity: 0.6 !important;
  }

  main > section {
    background: rgba(255, 255, 255, var(--opacity-glass-mobile)) !important;
  }

  .hero-section {
    background: linear-gradient(
      to bottom, 
      rgba(37, 99, 235, var(--opacity-glass-mobile)),
      rgba(37, 99, 235, var(--opacity-glass-mobile-strong))
    ) !important;
  }

  /* ───────────────────────────────────────────
     ✅ 17.5 Quote box et Citation box (CORRIGÉ)
     ─────────────────────────────────────────── */
  .quote-box {
    padding: 1.25rem !important;
    margin: 2rem 0 !important; /* ✅ CORRIGÉ v2.3 - Symétrique (était: 2rem 0 2.5rem 0) */
  }

  .citation-box {
    padding: 0.875rem !important;
    margin: 2rem 0 !important;
    font-size: 0.8125rem;
    line-height: 1.7; /* ✅ AJOUT v2.3 - Plus d'espace sur mobile */
  }

  /* ───────────────────────────────────────────
     ✅ 17.6 Headings (CORRIGÉ)
     ─────────────────────────────────────────── */
  .prose h3 {
    margin-top: 1.5rem !important; /* ✅ CORRIGÉ v2.3 - Réduit (était: 2.5rem) */
    margin-bottom: var(--spacing-md);
  }

  .prose h4 {
    margin-top: 1.25rem !important; /* ✅ CORRIGÉ v2.3 - Réduit (était: 2rem) */
    margin-bottom: var(--spacing-sm);
  }

  /* ───────────────────────────────────────────
     ✅ 17.7 Paragraphes mobile (AJOUT)
     ─────────────────────────────────────────── */
  .prose p {
    line-height: 1.75; /* ✅ AJOUT v2.3 - Encore plus d'espace mobile */
  }

  /* ───────────────────────────────────────────
     17.8 Buttons
     ─────────────────────────────────────────── */
  .copy-btn {
    margin-top: var(--spacing-lg);
    display: block;
    width: 100%;
  }

  /* ───────────────────────────────────────────
     17.9 Reading progress
     ─────────────────────────────────────────── */
  #reading-progress {
    padding: var(--spacing-sm);
    max-height: 300px;
  }

  .progress-label {
    font-size: 0.8125rem;
    min-width: 75px;
  }

  /* ───────────────────────────────────────────
     17.10 TOC mobile (override desktop)
     ─────────────────────────────────────────── */
  #toc-list {
    max-height: var(--toc-height-mobile);
  }
  
  #toc-list::-webkit-scrollbar {
    width: var(--scrollbar-width-mobile);
  }

  /* ───────────────────────────────────────────
     17.11 Tab navigation
     ─────────────────────────────────────────── */
  .tab-navigation {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .tab-nav-btn {
    width: 100%;
    justify-content: center;
    padding: var(--spacing-sm) 1.25rem;
    font-size: 0.875rem;
  }

  .tab-position {
    order: -1;
    padding: var(--spacing-xs);
    background: var(--color-gray-100);
    border-radius: var(--radius-base);
    width: 100%;
  }

  /* ───────────────────────────────────────────
     17.12 Back to top button
     ─────────────────────────────────────────── */
  .back-to-top-btn {
    bottom: 4rem;
    right: var(--spacing-md);
    width: 3rem;
    height: 3rem;
  }

  /* ───────────────────────────────────────────
     17.13 Section crédits
     ─────────────────────────────────────────── */
  #credits {
    padding: 2rem 0;
  }
  
  #credits h2 {
    font-size: 1rem;
  }
  
  #credits .bg-gray-50 {
    padding: 0.875rem;
  }
  
  #credits .font-mono {
    font-size: 0.8125rem;
  }
  
  #credits button {
    width: 100%;
  }
  
  #credits dl {
    grid-template-columns: 1fr !important;
  }
  
  #credits .flex.items-start img {
    width: 64px !important;
  }
}

/* ───────────────────────────────────────────
   ✅ 17.14 Très petit mobile (AJOUT v2.3)
   ─────────────────────────────────────────── */
@media (max-width: 380px) {
  .quote-box {
    padding: var(--spacing-md) !important;
    margin: 1.5rem 0 !important; /* ✅ AJOUT v2.3 - Réduit pour gagner espace */
    font-size: 0.9375rem;
  }

  .citation-box {
    padding: var(--spacing-sm) !important;
    font-size: 0.75rem;
  }

  .prose h3 {
    font-size: 1.5rem;
  }

  .prose h4 {
    font-size: 1.25rem;
  }

  .prose p {
    font-size: 0.9375rem;
    line-height: 1.8; /* ✅ AJOUT v2.3 - Encore plus d'espace sur très petit mobile */
  }
}

/* ============================================
   FIN DU FICHIER
   ============================================ */