/* Actualités ITBS : liste (actualites/index.html) et page de chaque actualité (actualites/<id>/index.html).
   Pages fabriquées à partir de actualites.json (voir actualites.md). Mêmes cartes que l'accueil, sans ombre. */

:root {
  --encre: #111827;
  --texte: #374151;
  --discret: #6B7280;
  --accent: #4F46E5;
  --accent-fonce: #4338CA;
  --accent-clair: #EEF2FF;
  --bord: #E5E7EB;
  --fond: #FFFFFF;
  --fond-alt: #F9FAFB;
  --rayon: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: 'Outfit', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; color: var(--texte); background: var(--fond); line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: var(--accent); }
h1, h2, h3 { color: var(--encre); line-height: 1.25; margin: 0; }
.visuellement-cache { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.conteneur { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.conteneur-etroit { max-width: 860px; }

/* ---- Barre du haut ---- */
.barre { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--bord); }
.barre-contenu { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 12px; }
.logo img { height: 34px; width: auto; }
.barre-liens { display: flex; align-items: center; gap: 16px; }
.barre-liens > a:not(.bouton) { color: var(--encre); font-weight: 600; text-decoration: none; display: inline-flex; align-items: center; gap: 8px; }
.barre-liens > a:not(.bouton):hover { color: var(--accent); }

.bouton { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 22px; border-radius: 10px; border: 2px solid transparent; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; transition: background .2s, color .2s, border-color .2s; }
.bouton-petit { padding: 7px 14px; font-size: 14px; }
.bouton-plein { background: var(--accent); color: #fff; }
.bouton-plein:hover { background: var(--accent-fonce); }
.bouton-contour { background: #fff; color: var(--accent); border-color: var(--accent); }
.bouton-contour:hover { background: var(--accent-clair); }

/* ---- En-tête de la liste : comme le titre de la section de l'accueil ---- */
.entete { padding: 56px 0 8px; text-align: center; }
.surtitre { display: inline-block; margin: 0 0 16px; padding: 6px 16px; background: var(--accent-clair); color: var(--accent); border-radius: 999px; font-size: 13px; font-weight: 600; letter-spacing: .5px; text-transform: uppercase; }
.entete h1 { font-size: clamp(30px, 4.4vw, 46px); font-weight: 800; }
.degrade { background: linear-gradient(135deg, var(--accent), #6366F1); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.entete .chapeau { margin: 12px auto 0; max-width: 620px; font-size: 17px; color: var(--discret); }

.section { padding: 40px 0 72px; }
.section-alt { background: var(--fond-alt); border-top: 1px solid var(--bord); padding-top: 48px; }
.section-alt h2 { font-size: 24px; margin-bottom: 24px; }

/* ---- Cartes ---- */
.grille { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.carte { position: relative; display: flex; flex-direction: column; background: #fff; border: 1px solid var(--bord); border-radius: var(--rayon); overflow: hidden; transition: border-color .25s, transform .25s; }
.carte:hover { border-color: #A5B4FC; transform: translateY(-4px); }
.carte:focus-within { outline: 3px solid #A5B4FC; outline-offset: 2px; }
.carte-image { position: relative; height: 200px; overflow: hidden; background: var(--fond-alt); }
.carte-image img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.carte:hover .carte-image img { transform: scale(1.05); }
.carte-date { position: absolute; bottom: 12px; left: 12px; padding: 4px 12px; background: #fff; border-radius: 999px; font-size: 12px; font-weight: 600; color: var(--texte); }
.carte-corps { display: flex; flex-direction: column; flex: 1; padding: 20px 24px 24px; }
.tag { align-self: flex-start; display: inline-block; padding: 3px 10px; background: var(--accent-clair); color: var(--accent); border-radius: 999px; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
.carte-corps .tag { margin-bottom: 10px; }
.carte h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.carte h3 a { color: inherit; text-decoration: none; }
.carte h3 a::after { content: ""; position: absolute; inset: 0; }   /* toute la carte est cliquable */
.carte h3 a:focus-visible { outline: none; }
.carte p { margin: 0 0 14px; font-size: 14px; }
.carte-suite { margin-top: auto; display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--accent); }
.carte-suite i { transition: transform .2s; }
.carte:hover .carte-suite i { transform: translateX(3px); }

.suite-facebook { margin: 40px 0 0; text-align: center; }

/* ---- Page d'une actualité ---- */
.article { padding: 40px 0 56px; }
.article-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin: 0 0 14px; color: var(--discret); font-weight: 500; }
.article h1 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; margin-bottom: 16px; }
.article .chapeau { margin: 0 0 24px; font-size: 19px; color: var(--texte); }
.article-image { margin: 0 0 28px; border-radius: var(--rayon); overflow: hidden; background: var(--fond-alt); }
.article-image img { width: 100%; max-height: 520px; object-fit: cover; }
.article-texte p { margin: 0 0 16px; font-size: 17px; line-height: 1.75; }
.galerie { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 28px 0 0; }
.galerie img { width: 100%; height: 180px; object-fit: cover; border-radius: 12px; }
.article-lien { margin: 28px 0 0; }

/* ---- Pied ---- */
.pied { background: #111827; color: #9CA3AF; padding: 28px 0; font-size: 14px; }
.pied p { margin: 0; }
.pied a { color: #C7D2FE; }

@media (max-width: 1024px) {
  .grille { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 768px) {
  .conteneur { padding: 0 16px; }
  .entete { padding: 40px 0 4px; }
  .entete .chapeau { font-size: 16px; }
  .section { padding: 28px 0 56px; }
  .galerie { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article .chapeau { font-size: 17px; }
}
@media (max-width: 480px) {
  .grille { grid-template-columns: 1fr; }
  .barre-liens { gap: 10px; }
  .barre-liens .bouton span { display: none; }
  .galerie img { height: 140px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}