/* === Variables CSS === */
:root {
  /* Couleurs de fond (thème clair Nexus) */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #f0f2f5;
  --bg-hover: #e9ecef;

  /* Texte */
  --text-primary: #1a1a1a;
  --text-secondary: #4a5568;
  --text-muted: #718096;

  /* Accents verts */
  --accent-primary: #457a3a;
  --accent-secondary: #56963f;
  --accent-gradient: linear-gradient(135deg, #457a3a 0%, #56963f 100%);
  --accent-light: #e8f5e9;

  /* Bordures et ombres */
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 2px 8px 0 rgb(0 0 0 / 0.10);
  --shadow-lg: 0 4px 16px 0 rgb(0 0 0 / 0.12);

  /* Espacements */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

/* === Reset et Base === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-secondary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background-color: var(--accent-primary);
  color: white;
}

/* === Navigation principale === */
.main-nav {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  transition: all 0.3s ease;
  letter-spacing: -0.5px;
}

.logo:hover {
  transform: translateY(-2px);
  filter: brightness(1.2);
}

.nav-links {
  display: flex;
  gap: 0.25rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: width 0.3s ease;
}

.nav-links a:hover {
  color: var(--accent-primary);
  background-color: var(--accent-light);
}

.nav-links a.active {
  color: var(--accent-primary);
  background-color: var(--accent-light);
}

.nav-links a.active::after,
.nav-links a:hover::after {
  width: 60%;
}

/* === Layout principal === */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
  animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* === Hero Section (Page d'accueil) === */
main > h1:first-child {
  font-size: 3.5rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
  letter-spacing: -1px;
}

main > h1:first-child + p {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-xl);
}

/* === Cartes et sections === */
main h2 {
  position: relative;
  padding-left: var(--spacing-sm);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

main h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 80%;
  background: var(--accent-gradient);
  border-radius: 2px;
}

main h3 {
  color: var(--text-primary);
  margin-top: var(--spacing-lg);
  font-size: 1.5rem;
  font-weight: 600;
}

main h3 a {
  color: inherit;
  text-decoration: none;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

main h3 a:hover {
  color: var(--accent-secondary);
  transform: translateX(5px);
}

main h3 a::after {
  content: '→';
  opacity: 0;
  transform: translateX(-10px);
  transition: all 0.3s ease;
}

main h3 a:hover::after {
  opacity: 1;
  transform: translateX(0);
}

/* === Layout Cours avec sidebar === */
.cours-container {
  display: flex;
  max-width: 100%;
  margin: 0 auto;
  min-height: calc(100vh - 140px);
  gap: 0;
  position: relative;
  padding-right: 300px; /* Reserve space for fixed TOC sidebar */
}

/* Sidebar toggle button */
.sidebar-toggle {
  position: fixed;
  left: 1rem;
  top: 5rem;
  z-index: 999;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.75rem;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.3s ease;
  box-shadow: var(--shadow-md);
}

.sidebar-toggle:hover {
  background: var(--bg-tertiary);
  color: var(--accent-secondary);
  transform: translateX(2px);
}

.sidebar-toggle svg {
  display: block;
}

/* Sidebar gauche */
.sidebar {
  width: 280px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: var(--spacing-lg) 0;
  position: sticky;
  top: 70px;
  height: calc(100vh - 70px);
  overflow-y: auto;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, width 0.3s ease;
}

.sidebar.collapsed {
  transform: translateX(-100%);
  width: 0;
  padding: 0;
  border: none;
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.sidebar-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  transition: all 0.2s ease;
  line-height: 1;
}

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

.sidebar::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

.sidebar h3 {
  color: var(--text-primary);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 0 var(--spacing-md);
  margin-bottom: var(--spacing-md);
  opacity: 0.7;
}

.cours-nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0 var(--spacing-sm);
}

.cours-nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: var(--spacing-sm) var(--spacing-md);
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
  border-radius: 0 8px 8px 0;
  font-size: 0.95rem;
  font-weight: 500;
}

.cours-nav a:hover {
  background-color: var(--accent-light);
  color: var(--text-primary);
  border-left-color: var(--accent-secondary);
  transform: translateX(2px);
}

.cours-nav a.active {
  color: var(--accent-secondary);
  background: linear-gradient(90deg, var(--accent-light) 0%, transparent 100%);
  border-left-color: var(--accent-primary);
  font-weight: 600;
}

.cours-content {
  flex: 1;
  padding: var(--spacing-xl);
  max-width: none; /* Remove max-width constraint */
  margin: 0;
  width: 100%;
  overflow-x: auto; /* Enable horizontal scroll if needed */
  min-width: 0; /* Allow flex item to shrink below content size */
}

.cours-content article {
  animation: fadeIn 0.6s ease;
}

/* === Table des matières (TOC) à droite === */
.toc-sidebar {
  width: 280px;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  padding: var(--spacing-lg) 0;
  position: fixed;
  right: 0;
  top: 70px;
  height: calc(100vh - 70px);
  overflow-y: auto;
  box-shadow: var(--shadow-sm);
}

.toc-sidebar::-webkit-scrollbar {
  width: 6px;
}

.toc-sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.toc-sidebar::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 3px;
}

.toc-sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

.toc-header {
  padding: 0 var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.toc-header h3 {
  color: var(--text-primary);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: 0.7;
  margin: 0;
}

.toc-nav {
  padding: 0 var(--spacing-sm);
}

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

.toc-item {
  margin: 0;
  padding: 0;
}

.toc-link {
  display: block;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.5rem var(--spacing-md);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
  border-radius: 0 6px 6px 0;
  line-height: 1.4;
}

.toc-link:hover {
  background-color: var(--accent-light);
  color: var(--text-primary);
  border-left-color: var(--accent-secondary);
  transform: translateX(2px);
}

.toc-link.active {
  color: var(--accent-secondary);
  background: linear-gradient(90deg, var(--accent-light) 0%, transparent 100%);
  border-left-color: var(--accent-primary);
  font-weight: 600;
}

/* Indentation pour les niveaux de titres */
.toc-h1 .toc-link {
  padding-left: var(--spacing-md);
  font-weight: 600;
  font-size: 0.95rem;
}

.toc-h2 .toc-link {
  padding-left: calc(var(--spacing-md) + 0.75rem);
  font-size: 0.875rem;
}

.toc-h3 .toc-link {
  padding-left: calc(var(--spacing-md) + 1.5rem);
  font-size: 0.85rem;
  opacity: 0.9;
}

/* === Typographie améliorée === */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  margin-top: 2em;
  margin-bottom: 0.8em;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.5px;
}

h1 {
  font-size: 2.5rem;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 2rem;
  color: var(--text-primary);
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
  color: var(--text-secondary);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
  font-size: 1.05rem;
}

strong, b {
  color: var(--text-primary);
  font-weight: 600;
}

em, i {
  color: var(--accent-primary);
  font-style: italic;
}

hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-color), transparent);
  margin: var(--spacing-xl) 0;
}

/* === Liens === */
a {
  color: var(--accent-secondary);
  text-decoration: none;
  transition: all 0.2s ease;
  position: relative;
}

a:hover {
  color: var(--accent-primary);
}

main p a,
main li a {
  text-decoration: underline;
  text-decoration-color: rgba(89, 146, 88, 0.3);
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
}

main p a:hover,
main li a:hover {
  text-decoration-color: var(--accent-primary);
  text-decoration-thickness: 2px;
}

/* === Listes === */
ul, ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

li {
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
  padding-left: var(--spacing-xs);
}

ul li::marker {
  color: var(--accent-secondary);
}

ol li::marker {
  color: var(--accent-secondary);
  font-weight: 700;
}

/* === Images === */
img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: var(--spacing-lg) auto;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
}

main p img,
.cours-content img {
  margin: var(--spacing-lg) 0;
}

/* === Code === */
code {
  background: rgba(89, 146, 88, 0.1);
  border: 1px solid rgba(89, 146, 88, 0.2);
  padding: 0.2em 0.5em;
  border-radius: 6px;
  font-family: 'Fira Code', 'Consolas', 'Monaco', monospace;
  font-size: 0.9em;
  color: var(--accent-secondary);
  font-weight: 500;
}

pre {
  background: var(--bg-secondary);
  padding: var(--spacing-md);
  border-radius: 12px;
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  position: relative;
}

pre::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 12px 12px 0 0;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-secondary);
  font-size: 0.95em;
  line-height: 1.6;
}

/* === Tableaux === */
table {
  border-collapse: collapse;
  width: 100%;
  margin: var(--spacing-lg) 0;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: block; /* Allow table to scroll */
  overflow-x: auto; /* Enable horizontal scroll for wide tables */
  max-width: 100%;
}

th, td {
  border: 1px solid var(--border-color);
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
}

th {
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
}

tr {
  transition: background-color 0.2s ease;
}

tbody tr:hover {
  background-color: var(--accent-light);
}

/* === Blockquotes === */
blockquote {
  border-left: 4px solid var(--accent-primary);
  background: var(--accent-light);
  padding: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  border-radius: 0 8px 8px 0;
  font-style: italic;
  color: var(--text-secondary);
}

blockquote p:last-child {
  margin-bottom: 0;
}

/* === Callouts Obsidian === */
.callout {
  border-left: 4px solid;
  border-radius: 8px;
  padding: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  background: var(--bg-secondary);
  box-shadow: var(--shadow-sm);
}

.callout-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  font-size: 1.05rem;
}

.callout-icon {
  font-size: 1.2em;
}

.callout-content {
  font-style: normal;
  color: var(--text-secondary);
}

.callout-content > *:last-child {
  margin-bottom: 0;
}

/* Types de callouts */
.callout-note, .callout-info {
  border-left-color: #3b82f6;
  background: rgba(59, 130, 246, 0.05);
}

.callout-note .callout-title,
.callout-info .callout-title {
  color: #2563eb;
}

.callout-tip, .callout-hint, .callout-important {
  border-left-color: #10b981;
  background: rgba(16, 185, 129, 0.05);
}

.callout-tip .callout-title,
.callout-hint .callout-title,
.callout-important .callout-title {
  color: #059669;
}

.callout-warning, .callout-caution, .callout-attention {
  border-left-color: #f59e0b;
  background: rgba(245, 158, 11, 0.05);
}

.callout-warning .callout-title,
.callout-caution .callout-title,
.callout-attention .callout-title {
  color: #b45309;
}

.callout-danger, .callout-error {
  border-left-color: #ef4444;
  background: rgba(239, 68, 68, 0.05);
}

.callout-danger .callout-title,
.callout-error .callout-title {
  color: #dc2626;
}

.callout-success, .callout-check, .callout-done {
  border-left-color: #599258;
  background: var(--accent-light);
}

.callout-success .callout-title,
.callout-check .callout-title,
.callout-done .callout-title {
  color: #457a3a;
}

.callout-question, .callout-help, .callout-faq {
  border-left-color: #8b5cf6;
  background: rgba(139, 92, 246, 0.05);
}

.callout-question .callout-title,
.callout-help .callout-title,
.callout-faq .callout-title {
  color: #7c3aed;
}

.callout-example {
  border-left-color: #6366f1;
  background: rgba(99, 102, 241, 0.05);
}

.callout-example .callout-title {
  color: #4f46e5;
}

.callout-quote, .callout-cite {
  border-left-color: #64748b;
  background: rgba(100, 116, 139, 0.05);
  font-style: italic;
}

.callout-quote .callout-title,
.callout-cite .callout-title {
  color: #475569;
}

/* === Password Protection === */
.password-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 2000;
}

.password-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: var(--spacing-xl);
  max-width: 400px;
  width: 90%;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.password-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.8;
  }
}

.password-container h2 {
  color: var(--text-primary);
  font-size: 1.8rem;
  margin-bottom: var(--spacing-sm);
  font-weight: 700;
}

.password-container p {
  color: var(--text-muted);
  margin-bottom: var(--spacing-lg);
  font-size: 0.95rem;
}

#passwordForm {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

#passwordInput {
  padding: var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: 'Fira Code', monospace;
  text-align: center;
  transition: all 0.3s ease;
}

#passwordInput:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(89, 146, 88, 0.1);
}

#passwordInput.error {
  border-color: #ef4444;
  animation: shake 0.5s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
  20%, 40%, 60%, 80% { transform: translateX(5px); }
}

#passwordForm button {
  padding: var(--spacing-md);
  background: var(--accent-gradient);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-md);
}

#passwordForm button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  filter: brightness(1.1);
}

#passwordForm button:active {
  transform: translateY(0);
}

.password-error {
  color: #ef4444;
  font-size: 0.9rem;
  margin-top: var(--spacing-sm);
  min-height: 1.5rem;
  font-weight: 500;
}

.password-back-link {
  display: block;
  margin-top: var(--spacing-md);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.password-back-link:hover {
  color: var(--accent-secondary);
}

/* === Footer === */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: var(--spacing-xl);
}

/* === Boutons et éléments interactifs === */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--accent-gradient);
  color: white;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-md);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  filter: brightness(1.1);
}

/* === Animations === */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.cours-nav a {
  animation: slideIn 0.3s ease backwards;
}

.cours-nav a:nth-child(1) { animation-delay: 0.05s; }
.cours-nav a:nth-child(2) { animation-delay: 0.1s; }
.cours-nav a:nth-child(3) { animation-delay: 0.15s; }
.cours-nav a:nth-child(4) { animation-delay: 0.2s; }
.cours-nav a:nth-child(5) { animation-delay: 0.25s; }

/* === Scrollbar personnalisée === */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

/* === Responsive === */
@media (max-width: 1400px) {
  .toc-sidebar {
    display: none;
  }

  .cours-container {
    padding-right: 0; /* Remove TOC padding on smaller screens */
  }

  .cours-content {
    max-width: 1000px;
    margin: 0 auto;
  }
}

@media (max-width: 1024px) {
  :root {
    font-size: 14px;
  }

  .nav-container {
    padding: 0 var(--spacing-md);
  }

  .sidebar-toggle {
    display: block;
  }

  .sidebar {
    position: fixed;
    left: 0;
    top: 70px;
    z-index: 998;
    height: calc(100vh - 70px);
  }

  .sidebar.collapsed {
    transform: translateX(-100%);
  }

  .cours-container {
    padding-right: 0; /* Remove TOC padding on smaller screens */
  }

  .toc-sidebar {
    display: none;
  }

  .cours-content {
    padding: var(--spacing-lg);
    max-width: 100%;
  }

  main {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  main > h1:first-child {
    font-size: 2.5rem;
  }
}

@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    height: auto;
    padding: var(--spacing-sm);
    gap: var(--spacing-sm);
  }

  .nav-links {
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
  }

  .logo {
    font-size: 1.2rem;
  }

  main > h1:first-child {
    font-size: 2rem;
  }

  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
}

/* === Print styles === */
@media print {
  .main-nav,
  .sidebar,
  footer {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .cours-content {
    padding: 0;
  }
}

/* === TOC - gestion des niveaux étendus/repliés === */
.toc-h2 > ul {
  display: none;
  transition: all 0.3s ease;
}

.toc-toggle {
  cursor: pointer;
  display: inline-block;
  font-weight: bold;
  margin-right: 6px;
  color: var(--text-muted);
  transition: transform 0.2s ease, color 0.2s ease;
}

.toc-toggle:hover {
  color: var(--accent-secondary);
  transform: scale(1.2);
}

.toc-h2 > .toc-link {
  cursor: pointer;
}

.toc-h3 .toc-link {
  opacity: 0.8;
}

.callout.note {
  border-left: 4px solid #457a3a;
  background-color: #f0f7ee;
  padding: 1em 1.2em;
  margin: 1.2em 0;
  border-radius: 6px;
}

.callout.definition {
  border-color: #2563eb;
  background-color: #eff6ff;
}

.callout.example {
  border-color: #7c3aed;
  background-color: #f5f3ff;
}

.callout.code {
  border-color: #b45309;
  background-color: #fffbeb;
}

/* ============================================================
   COMPOSANTS PORTFOLIO & PAGES CONTENU
   ============================================================ */

/* === Hero Section (Accueil) === */
.hero-section {
  padding: var(--spacing-xl) 0 var(--spacing-lg);
  max-width: 760px;
}

.hero-section h1 {
  font-size: 3rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-xs);
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
  font-weight: 500;
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
}

.hero-links {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

/* === Boutons === */
.btn {
  display: inline-block;
  padding: 0.65rem 1.4rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.25s ease;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
}

.btn-primary:hover {
  filter: brightness(1.15);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--accent-secondary);
  border: 1px solid var(--accent-primary);
}

.btn-secondary:hover {
  background: rgba(89, 146, 88, 0.12);
  transform: translateY(-2px);
}

/* === Grille de projets === */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-md) 0;
}

/* === Carte de projet === */
.project-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: var(--spacing-md);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-primary);
}

.project-card.featured {
  border-left: 3px solid var(--accent-primary);
}

.project-card.featured.large {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
}

.project-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.project-card h3 a {
  color: inherit;
  text-decoration: none;
}

.project-card h3 a:hover {
  color: var(--accent-secondary);
}

.project-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  flex: 1;
}

.project-header {
  margin-bottom: 0.25rem;
}

.card-link {
  color: var(--accent-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  margin-top: auto;
  padding-top: var(--spacing-xs);
}

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

/* === Tags === */
.project-tag {
  display: inline-block;
  background: rgba(89, 146, 88, 0.15);
  color: var(--accent-secondary);
  border: 1px solid rgba(89, 146, 88, 0.3);
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-right: 0.4rem;
  margin-bottom: 0.3rem;
}

/* === Tech stack pills === */
.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.tech-stack span {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  padding: 0.2rem 0.55rem;
  border-radius: 5px;
  font-size: 0.78rem;
  font-family: 'Fira Code', monospace;
}

/* === Features grid (accueil) === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-md) 0;
}

.feature-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: var(--spacing-md);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-primary);
}

.feature-icon {
  font-size: 1.8rem;
  margin-bottom: var(--spacing-xs);
}

.feature-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-xs);
}

.feature-card a {
  color: var(--accent-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
}

.feature-card a:hover {
  color: var(--text-primary);
}

/* === Hero projet === */
.project-hero {
  padding: var(--spacing-lg) 0 var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--spacing-lg);
}

.project-hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: var(--spacing-xs) 0;
  letter-spacing: -0.5px;
}

.project-tagline {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 720px;
  margin-top: var(--spacing-xs);
}

/* === Galeries d'images === */
.image-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-md) 0;
}

.image-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin: var(--spacing-md) 0;
}

.image-row figure {
  flex: 1;
  min-width: 220px;
}

figure {
  margin: 0;
}

figure img {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  display: block;
}

figcaption {
  margin-top: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
  font-style: italic;
}

/* === Articles === */
.article-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin: var(--spacing-md) 0;
}

.article-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent-primary);
  border-radius: 12px;
  padding: var(--spacing-md);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.article-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-secondary);
}

.article-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0.4rem 0 0.6rem;
}

.article-card h3 a {
  color: inherit;
  text-decoration: none;
}

.article-card h3 a:hover {
  color: var(--accent-secondary);
}

.article-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: var(--spacing-xs);
}

.article-meta {
  margin-bottom: 0.3rem;
}

.article-tag {
  display: inline-block;
  background: rgba(89, 146, 88, 0.15);
  color: var(--accent-secondary);
  border: 1px solid rgba(89, 146, 88, 0.3);
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
}

.read-more {
  color: var(--accent-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
}

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

/* === Architecture figure === */
.architecture-figure {
  margin: var(--spacing-md) 0;
}

/* === Responsive === */
@media (max-width: 768px) {
  .hero-section h1 {
    font-size: 2.2rem;
  }

  .project-grid {
    grid-template-columns: 1fr;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .image-row {
    flex-direction: column;
  }

  .image-gallery {
    grid-template-columns: 1fr;
  }

  .hero-links {
    flex-direction: column;
  }
}