/* === POLICES === */

@font-face {
  font-family: 'Gilroy';
  src: url('../fonts/Gilroy-ExtraBold.otf') format('opentype');
  font-weight: 800;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Gilroy';
  src: url('../fonts/Gilroy-Light.otf') format('opentype');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

/* === VARIABLES === */

:root {
  /* Couleurs EFREI */
  --color-navy: #163767;
  --color-navy-dark: #0f1d45;
  --color-pink: #ff43b8;
  --color-pink-light: #ffcbea;

  /* Variantes marines pour dégradés */
  --color-navy-mid: #1a2e6b;
  --color-navy-grad: #2a4090;
  --color-navy-light: #3a5ab8;

  /* Couleurs catégories (matières / enseignants) */
  --color-cat-orange: #e8870a;
  --color-cat-orange-light: #f4a02e;
  --color-cat-orange-dark: #d35400;
  --color-cat-orange-dark-light: #e67e22;
  --color-cat-green: #2d7d46;
  --color-cat-green-light: #3ca55c;
  --color-cat-purple: #7b2d8b;
  --color-cat-purple-light: #9b59b6;
  --color-cat-red: #c0392b;
  --color-cat-red-light: #e74c3c;
  --color-cat-blue: #1a7abf;
  --color-cat-blue-light: #3498db;
  --color-cat-teal: #16a085;
  --color-cat-teal-light: #1abc9c;

  /* Retours formulaire */
  --color-error: #e74c3c;
  --color-success-bg: #d4edda;
  --color-success-text: #155724;
  --color-success-border: #c3e6cb;

  /* Carte / décoration géographique */
  --color-map-start: #c8d6e5;
  --color-map-end: #8395a7;
  --color-map-text: #576574;

  /* Bordures du header */
  --color-header-border: #6d7079;
  --color-header-border-scrolled: #d6dbe2;

  /* Recouvrements noirs */
  --color-overlay: rgba(0, 0, 0, 0.55);
  --color-overlay-dark: rgba(0, 0, 0, 0.9);
  --color-shadow-modal: rgba(0, 0, 0, 0.3);

  /* Recouvrements marins (galerie + carrousel) */
  --color-navy-mid-overlay: rgba(26, 46, 107, 0.5);
  --color-navy-dark-overlay-90: rgba(15, 29, 69, 0.90);
  --color-navy-dark-overlay-65: rgba(15, 29, 69, 0.65);
  --color-navy-dark-overlay-20: rgba(15, 29, 69, 0.20);

  /* Décorations orangées */
  --color-orange-glow: rgba(232, 135, 10, 0.12);
  --color-orange-today: rgba(232, 135, 10, 0.05);

  /* Éléments blancs sur fond sombre (opacités) */
  --color-on-dark-90: rgba(255, 255, 255, 0.9);
  --color-on-dark-80: rgba(255, 255, 255, 0.8);
  --color-on-dark-75: rgba(255, 255, 255, 0.75);
  --color-on-dark-70: rgba(255, 255, 255, 0.7);
  --color-on-dark-60: rgba(255, 255, 255, 0.6);
  --color-on-dark-50: rgba(255, 255, 255, 0.5);
  --color-on-dark-40: rgba(255, 255, 255, 0.4);
  --color-on-dark-35: rgba(255, 255, 255, 0.35);
  --color-on-dark-30: rgba(255, 255, 255, 0.3);
  --color-on-dark-20: rgba(255, 255, 255, 0.2);
  --color-on-dark-15: rgba(255, 255, 255, 0.15);
  --color-on-dark-10: rgba(255, 255, 255, 0.1);
  --color-on-dark-06: rgba(255, 255, 255, 0.06);
  --color-on-dark-04: rgba(255, 255, 255, 0.04);

  /* Couleurs neutres */
  --color-white: #ffffff;
  --color-bg-light: #f4f6f9;
  --color-text: #1a1a2e;
  --color-text-muted: #666680;
  --color-border: #dde2ee;

  /* Typographie */
  --font: 'Gilroy', Arial, sans-serif;

  /* Espacement et effets */
  --radius: 8px;
  --radius-lg: 16px;
  --shadow: 0 2px 12px rgba(26, 46, 107, 0.1);
  --shadow-lg: 0 8px 32px rgba(26, 46, 107, 0.18);
  --transition: 0.25s ease;

  /* Mise en page */
  --container: 1200px;
  --header-height: 70px;
}

/* Mode sombre */
[data-theme="dark"] {
  --color-navy: #4a6bbf;
  --color-navy-dark: #6a8bd0;
  --color-white: #12121e;
  --color-bg-light: #1e1e30;
  --color-text: #e8eaf6;
  --color-text-muted: #9999bb;
  --color-border: #2e2e4a;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
}

/* === RESET === */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  font-weight: 300;
  font-size: 1rem;
  color: var(--color-text);
  background-color: var(--color-white);
  line-height: 1.7;
  padding-top: var(--header-height);
}

img {
  max-width: 100%;
  display: block;
}

ul {
  list-style: none;
}

/* === TYPOGRAPHIE === */

h1, h2, h3, h4, h5, h6 {
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-navy);
}

h1 { font-size: 2.6rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.4rem; }
h4 { font-size: 1.1rem; }

p {
  margin-bottom: 1rem;
}

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

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

a:hover {
  color: var(--color-pink);
}

/* === MISE EN PAGE === */

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 72px 0;
}

.section-bg {
  background-color: var(--color-bg-light);
}

/* === TITRES DE SECTION === */

.section-header {
  margin-bottom: 48px;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-navy);
  margin-bottom: 8px;
}

.section-title span {
  color: var(--color-pink);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
}

/* Ligne decorative sous le titre */
.section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 4px;
  background: var(--color-pink);
  border-radius: 2px;
  margin-top: 10px;
}

/* === BOUTONS === */

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-family: var(--font);
  font-weight: 800;
  font-size: 0.95rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
  text-align: center;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--color-pink);
  color: var(--color-white);
  border-color: var(--color-pink);
}

.btn-primary:hover {
  background: var(--color-pink-light);
  border-color: var(--color-pink-light);
  color: var(--color-white);
}

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

.btn-outline:hover {
  background: var(--color-navy);
  color: var(--color-white);
}

.btn-white {
  background: var(--color-white);
  color: var(--color-navy);
  border-color: var(--color-white);
}

.btn-white:hover {
  background: transparent;
  color: var(--color-white);
}

/* === CARTES === */

.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* === GRILLES DE CARTES === */

.cards-grid {
  display: grid;
  gap: 24px;
}

.cards-2 {
  grid-template-columns: repeat(2, 1fr);
}

.cards-3 {
  grid-template-columns: repeat(3, 1fr);
}

/* === PLACEHOLDER IMAGE === */

.img-placeholder {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-on-dark-60);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* === BADGE === */

.badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 800;
  background: var(--color-bg-light);
  color: var(--color-navy);
}

.badge-orange {
  background: var(--color-pink);
  color: var(--color-white);
}

.badge-navy {
  background: var(--color-navy);
  color: var(--color-white);
}

/* === ANIMATION FADE-IN === */

.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === OVERLAY / MODAL === */

.overlay {
  position: fixed;
  inset: 0;
  background: var(--color-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 36px;
  max-width: 500px;
  width: 92%;
  position: relative;
  box-shadow: 0 20px 60px var(--color-shadow-modal);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 20px;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-muted);
  line-height: 1;
  transition: color var(--transition);
}

.modal-close:hover {
  color: var(--color-navy);
}

/* === RESPONSIVE === */

@media (max-width: 1024px) {
  .cards-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  h1 { font-size: 1.9rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.2rem; }

  .section {
    padding: 48px 0;
  }

  .cards-2,
  .cards-3 {
    grid-template-columns: 1fr;
  }
}