@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;800;900&display=swap');

html {
  scroll-behavior: smooth;
}

:root {
  /* Thème Fun et Dynamique pour des 6èmes */
  --primary-color: #8b5cf6; /* Violet vif */
  --primary-light: #a78bfa;
  --secondary-color: #f59e0b; /* Orange fun */
  --secondary-light: #fbbf24;
  --accent-color: #ec4899; /* Rose dynamique */
  --accent-blue: #06b6d4; /* Cyan */
  
  --bg-color: #f8fafc; /* Fond très clair */
  --bg-card: #ffffff;
  
  --text-main: #334155; 
  --text-muted: #64748b; 
  
  --border-color: #e2e8f0; 
  --shadow-sm: 0 4px 6px -1px rgb(139 92 246 / 0.1);
  --shadow-md: 0 10px 15px -3px rgb(139 92 246 / 0.15);
  --shadow-hover: 0 20px 25px -5px rgb(139 92 246 / 0.2);
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-main: 'Nunito', sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-image: radial-gradient(#e2e8f0 1px, transparent 1px);
  background-size: 20px 20px;
}

/* Header & Navigation */
header {
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 2px solid var(--primary-light);
}

.navbar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

@media (min-width: 992px) {
  .navbar {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.logo a {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--primary-color);
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.logo span {
  color: var(--secondary-color);
  background: var(--bg-color);
  padding: 0.2rem 0.6rem;
  border-radius: 1rem;
  border: 2px dashed var(--secondary-color);
  font-size: 1.2rem;
  transform: rotate(-5deg);
  display: inline-block;
}

.nav-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-main);
  font-weight: 800;
  font-size: 0.95rem;
  transition: var(--transition);
  padding: 0.5rem 1rem;
  border-radius: 2rem;
  background-color: var(--bg-color);
  border: 2px solid var(--border-color);
}

.nav-links a:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 4px 0 var(--border-color);
}

.nav-links a.active {
  color: white;
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  box-shadow: 0 4px 0 var(--primary-light);
  transform: translateY(-2px);
}

/* Burger Menu (Mobile only) */
.menu-toggle {
  display: none;
  background: var(--primary-light);
  border: none;
  border-radius: 50%;
  width: 45px;
  height: 45px;
  cursor: pointer;
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  box-shadow: 0 4px 0 var(--primary-color);
}

.menu-toggle:active {
  transform: translateY(4px);
  box-shadow: none;
}

.menu-toggle .bar {
  display: block;
  width: 22px;
  height: 3px;
  margin: 4px auto;
  transition: var(--transition);
  background-color: white;
  border-radius: 2px;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-blue) 100%);
  color: white;
  text-align: center;
  padding: 4rem 2rem;
  margin: 1rem;
  border-radius: 2rem;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '🚀';
  font-size: 6rem;
  position: absolute;
  right: 5%;
  bottom: -20px;
  opacity: 0.2;
  transform: rotate(-15deg);
}

.hero::before {
  content: '⚡';
  font-size: 5rem;
  position: absolute;
  left: 5%;
  top: 10px;
  opacity: 0.2;
  transform: rotate(15deg);
}

.hero h1 {
  font-size: 3rem;
  font-weight: 900;
  margin-bottom: 1rem;
  text-shadow: 2px 2px 0 rgba(0,0,0,0.1);
}

.hero p {
  font-size: 1.25rem;
  font-weight: 600;
  max-width: 600px;
  margin: 0 auto;
  background: rgba(255,255,255,0.2);
  padding: 0.5rem 1rem;
  border-radius: 1rem;
}

/* Main Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem 4rem;
}

/* Chapters Grid (Home Page) */
.chapters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 2rem;
}

.chapter-card {
  background-color: var(--bg-card);
  border-radius: 1.5rem;
  padding: 2rem;
  text-decoration: none;
  color: var(--text-main);
  transition: var(--transition);
  border: 3px solid var(--border-color);
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  box-shadow: 0 8px 0 var(--border-color);
}

/* Couleurs alternées pour les cartes */
.chapter-card:nth-child(4n+1) { border-color: var(--primary-light); box-shadow: 0 8px 0 var(--primary-color); }
.chapter-card:nth-child(4n+2) { border-color: var(--secondary-light); box-shadow: 0 8px 0 var(--secondary-color); }
.chapter-card:nth-child(4n+3) { border-color: var(--accent-blue); box-shadow: 0 8px 0 #0891b2; }
.chapter-card:nth-child(4n+4) { border-color: var(--accent-color); box-shadow: 0 8px 0 #db2777; }

.chapter-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 0 currentColor;
}
.chapter-card:nth-child(4n+1):hover { box-shadow: 0 12px 0 var(--primary-color); }
.chapter-card:nth-child(4n+2):hover { box-shadow: 0 12px 0 var(--secondary-color); }
.chapter-card:nth-child(4n+3):hover { box-shadow: 0 12px 0 #0891b2; }
.chapter-card:nth-child(4n+4):hover { box-shadow: 0 12px 0 #db2777; }

.chapter-number {
  font-size: 1rem;
  font-weight: 900;
  background-color: var(--bg-color);
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  display: inline-block;
  margin-bottom: 1rem;
  border: 2px dashed currentColor;
}
.chapter-card:nth-child(4n+1) .chapter-number { color: var(--primary-color); }
.chapter-card:nth-child(4n+2) .chapter-number { color: var(--secondary-color); }
.chapter-card:nth-child(4n+3) .chapter-number { color: var(--accent-blue); }
.chapter-card:nth-child(4n+4) .chapter-number { color: var(--accent-color); }

.chapter-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.3;
}

/* Page Headers (Subpages) */
.page-header {
  margin-bottom: 2rem;
  padding: 2rem;
  background: white;
  border-radius: 1.5rem;
  border: 3px solid var(--primary-light);
  box-shadow: 0 8px 0 var(--primary-color);
  text-align: center;
}

.page-header .chapter-number {
  color: var(--secondary-color);
  border-color: var(--secondary-color);
  margin-bottom: 0.5rem;
}

.page-header h1 {
  color: var(--primary-color);
  font-size: 2.5rem;
  font-weight: 900;
}

/* Content Sections */
.section-title {
  color: var(--accent-color);
  font-size: 1.8rem;
  font-weight: 800;
  margin-top: 3rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.section-title::before {
  content: '🎯';
  font-size: 2rem;
}

.content-block {
  background-color: var(--bg-card);
  border-radius: 1rem;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border: 2px solid var(--border-color);
  box-shadow: 0 4px 0 var(--border-color);
  transition: var(--transition);
}

.content-block:hover {
  border-color: var(--accent-blue);
}

.content-block.alt {
  background: linear-gradient(135deg, #e0f2fe, #eff6ff);
  border-color: #7dd3fc;
  border-left: 6px solid var(--primary-color);
  box-shadow: 0 4px 0 #60a5fa;
}

.content-block.alt h3 {
  background: #bfdbfe;
  color: #075985;
}

.content-block.alt:hover {
  border-color: #7dd3fc;
  border-left-color: var(--primary-color);
}

.content-block h3 {
  color: var(--primary-color);
  font-weight: 800;
  font-size: 1.3rem;
  margin-bottom: 1rem;
  background: #f3f4f6;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  display: inline-block;
}

/* Competencies Table */
.competences-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-top: 1.5rem;
  background-color: var(--bg-card);
  border: 2px solid var(--secondary-light);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 6px 0 var(--secondary-color);
}

.competences-table th,
.competences-table td {
  padding: 1.5rem;
  text-align: left;
}

.competences-table th {
  background-color: var(--secondary-light);
  color: white;
  font-weight: 900;
  font-size: 1.2rem;
  letter-spacing: 1px;
}

.competences-table ul {
  padding-left: 1.5rem;
  margin: 0;
  list-style-type: '👉  ';
}

.competences-table li {
  margin-bottom: 0.8rem;
  font-weight: 600;
  color: var(--text-main);
}

/* Footer */
footer {
  background-color: white;
  padding: 2rem;
  text-align: center;
  color: var(--text-muted);
  border-top: 3px dashed var(--border-color);
  font-weight: 600;
}

/* Responsive */
@media (max-width: 991px) {
  .menu-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    margin-top: 1rem;
  }

  .nav-links.active {
    display: flex;
    animation: slideDown 0.3s ease-out forwards;
  }

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

  .nav-links a {
    text-align: center;
    border-radius: 1rem;
  }
}

/* Modal Overlay Que sais-je */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(5px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

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

.modal-content {
  background: var(--bg-card);
  width: 95%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  border-radius: 1.5rem;
  padding: 2rem;
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
  border: 4px solid var(--primary-light);
  transform: translateY(20px) scale(0.95);
  transition: var(--transition);
  position: relative;
}

/* Ajustements pour mobiles */
@media (max-width: 768px) {
  .modal-content {
    padding: 1rem;
    border-width: 2px;
    border-radius: 1rem;
  }
  .items-bank {
    padding: 0.5rem;
    gap: 0.4rem;
  }
  .draggable-item {
    padding: 0.4rem 0.6rem;
    font-size: 0.9rem;
  }
  .drop-zone {
    min-height: 70px;
    padding: 0.5rem;
  }
  .drop-zone h4 {
    font-size: 0.95rem;
  }
  .close-modal {
    top: 0.5rem;
    right: 1rem;
  }
  .quiz-question h3 {
    font-size: 1.2rem;
    padding-right: 1.5rem;
    margin-bottom: 1rem;
  }
}

/* Lightbox pour agrandir les images */
.lightbox-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(8px);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 2000;
  cursor: zoom-out;
  padding: 2rem;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.lightbox-overlay.active {
  display: flex;
  opacity: 1;
}

.lightbox-img {
  max-width: 95%;
  max-height: 90vh;
  border-radius: 0.5rem;
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
  transform: scale(0.9);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  border: 4px solid white;
}

.lightbox-overlay.active .lightbox-img {
  transform: scale(1);
}

.zoomable-img {
  cursor: zoom-in;
  transition: var(--transition);
}

.zoomable-img:hover {
  filter: brightness(1.1);
  transform: translateY(-5px) !important;
}

.modal-overlay.active .modal-content {
  transform: translateY(0) scale(1);
}

.close-modal {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  font-size: 2rem;
  font-weight: 900;
  color: var(--text-muted);
  cursor: pointer;
  background: none;
  border: none;
  transition: var(--transition);
}

.close-modal:hover {
  color: var(--accent-color);
  transform: scale(1.1) rotate(90deg);
}

.quiz-question {
  display: none;
  text-align: center;
}

.quiz-question.active {
  display: block;
  animation: fadeIn 0.4s ease-in-out;
}

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

.quiz-question h3 {
  color: var(--primary-color);
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  padding-right: 2rem;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.quiz-btn {
  background: var(--bg-color);
  border: 2px solid var(--border-color);
  padding: 1rem;
  border-radius: 1rem;
  font-family: var(--font-main);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 0 var(--border-color);
}

.quiz-btn:hover {
  transform: translateY(-2px);
  border-color: var(--secondary-light);
  box-shadow: 0 6px 0 var(--secondary-color);
}

.quiz-btn.correct {
  background: #dcfce7;
  border-color: #22c55e;
  box-shadow: 0 4px 0 #16a34a;
  color: #166534;
}

.quiz-btn.wrong {
  background: #fee2e2;
  border-color: #ef4444;
  box-shadow: 0 4px 0 #dc2626;
  color: #991b1b;
}

.quiz-feedback {
  min-height: 3rem;
  font-weight: 800;
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: var(--text-main);
}

.next-btn {
  background: #16a34a !important;
  color: white !important;
  border: none !important;
  padding: 0.75rem 1.6rem !important;
  border-radius: 2rem !important;
  font-family: var(--font-main);
  font-size: 1.05rem !important;
  font-weight: 800 !important;
  cursor: pointer;
  box-shadow: 0 4px 0 #14532d !important;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.next-btn:hover {
  transform: translateY(-2px);
  background: #15803d !important;
  box-shadow: 0 6px 0 #14532d !important;
  color: white !important;
}

.prev-btn {
  background: #64748b !important;
  color: white !important;
  border: none !important;
  padding: 0.75rem 1.4rem !important;
  border-radius: 2rem !important;
  font-family: var(--font-main);
  font-size: 1rem !important;
  font-weight: 700 !important;
  cursor: pointer;
  box-shadow: 0 4px 0 #334155 !important;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.prev-btn:hover {
  transform: translateY(-2px);
  background: #475569 !important;
  box-shadow: 0 6px 0 #1e293b !important;
  color: white !important;
}

.toggle-answer-btn {
  background: #0284c7 !important;
  color: white !important;
  border: none !important;
  padding: 0.75rem 1.4rem !important;
  border-radius: 2rem !important;
  font-family: var(--font-main);
  font-size: 1rem !important;
  font-weight: 800 !important;
  cursor: pointer;
  box-shadow: 0 4px 0 #0369a1 !important;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.toggle-answer-btn:hover {
  transform: translateY(-2px);
  background: #0369a1 !important;
  box-shadow: 0 6px 0 #075985 !important;
  color: white !important;
}

/* Image trigger */
.trigger-img {
  cursor: pointer;
  border-radius: 1rem;
  transition: var(--transition);
  max-width: 300px;
  width: 100%;
  display: block;
  margin: 1rem 0;
  border: 3px dashed var(--primary-light);
}

.trigger-img:hover {
  transform: scale(1.05) rotate(-2deg);
  box-shadow: var(--shadow-md);
}

/* Drag and Drop Styles */
.items-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  min-height: 50px;
  padding: 1rem;
  border: 2px dashed var(--border-color);
  border-radius: 1rem;
  background: #f8fafc;
  justify-content: center;
}

.draggable-item {
  background: white;
  border: 2px solid var(--secondary-light);
  padding: 0.5rem 1rem;
  border-radius: 2rem;
  cursor: grab;
  font-weight: 700;
  color: var(--primary-dark);
  user-select: none;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 0 var(--secondary-light);
}
.draggable-item:active { cursor: grabbing; transform: translateY(2px); box-shadow: none; }
.draggable-item.dragging { opacity: 0.5; }
.draggable-item.selected { border-color: var(--primary-color); background: var(--primary-light); color: white; box-shadow: 0 2px 0 var(--primary-color); }
.draggable-item.wrong { border-color: #ef4444; background: #fee2e2; color: #991b1b; box-shadow: 0 2px 0 #ef4444; }
.draggable-item.correct { border-color: #22c55e; background: #dcfce7; color: #166534; box-shadow: 0 2px 0 #22c55e; }

.drop-zones {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.drop-zone {
  border: 2px solid var(--primary-light);
  border-radius: 1rem;
  padding: 1rem;
  background: white;
  min-height: 100px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}
.drop-zone.drag-over {
  background: #f0fdfa;
  border-color: var(--primary-color);
  border-style: dashed;
}

.drop-zone h4 {
  margin-bottom: 0.5rem;
  color: var(--primary-color);
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.drop-content {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  flex-grow: 1;
}

.text-input-group {
  margin-bottom: 1.5rem;
  text-align: left;
}
.text-input-group label { font-weight: 700; color: var(--text-main); display: block; margin-bottom: 0.5rem; }
.text-input-group textarea { width: 100%; border: 2px solid var(--border-color); border-radius: 0.5rem; padding: 0.5rem; font-family: var(--font-main); resize: vertical; }
.correction-box { margin-top: 0.5rem; padding: 0.75rem; background: #f0fdf4; border: 2px solid #bbf7d0; border-radius: 0.5rem; font-weight: 600; }

/* Section Vocabulaire */
.vocab-section {
  background: #fdf4ff; /* Violet très clair */
  border: 3px solid #d8b4fe; /* Violet bordure */
  border-radius: 1.5rem;
  padding: 2rem;
  margin: 2.5rem 0;
  position: relative;
  overflow: hidden;
}

.vocab-section::before {
  content: '📖';
  position: absolute;
  top: -10px;
  right: 10px;
  font-size: 4rem;
  opacity: 0.1;
  transform: rotate(15deg);
}

.vocab-section h4 {
  color: #7e22ce;
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.vocab-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.vocab-item {
  background: white;
  padding: 1.2rem;
  border-radius: 1rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  border-left: 5px solid #a855f7;
  transition: transform 0.2s;
}

.vocab-item:hover {
  transform: translateY(-3px);
}

.vocab-item strong {
  display: block;
  color: #6b21a8;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.vocab-item p {
  font-size: 0.95rem;
  color: var(--text-main);
  margin: 0;
}

/* Raccourcis de navigation */
.shortcuts {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 1.5rem 0 2.5rem 0;
  flex-wrap: wrap;
}

.shortcut-link {
  background: #f3f0ff;
  color: var(--primary-color);
  padding: 0.6rem 1.4rem;
  border-radius: 2rem;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  border: 2px solid var(--primary-light);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.shortcut-link:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
}

@media (max-width: 600px) {
  .shortcuts {
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
  }
  .shortcut-link {
    width: 100%;
    max-width: 300px;
    text-align: center;
  }
}

/* ===== Illustrations page d'accueil ===== */

/* Photo décorative du bandeau d'accueil */
.hero-illustration {
  position: absolute;
  right: 4%;
  bottom: -12px;
  width: 220px;
  max-width: 24%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 1.5rem;
  border: 6px solid rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-md);
  transform: rotate(4deg);
  transition: var(--transition);
}

@media (max-width: 1099px) {
  .hero-illustration {
    display: none;
  }
}

/* Vignette des cartes de chapitres */
.card-illustration {
  width: 100%;
  height: 150px;
  object-fit: cover;
  object-position: center;
  border-radius: 1rem;
  border: 2px dashed var(--border-color);
  margin-bottom: 1.2rem;
  transition: var(--transition);
}

.chapter-card:hover .card-illustration {
  transform: scale(1.03) rotate(-1deg);
}