/* Socle — feuille de style du site public. Sobre, sans dépendance externe (polices système).
   Pour personnaliser un site : changer --accent (et éventuellement --accent-doux). */
:root {
  --accent: #2f5bea;
  --accent-doux: #e9eefd;
  --fond: #fbfbfa;
  --surface: #ffffff;
  --encre: #17191c;
  --encre-2: #4a5059;
  --encre-3: #7a818b;
  --trait: #e6e7ea;
  --rayon: 14px;
  --large: 760px;
  --police: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --police-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --accent: #7d9bff;
    --accent-doux: #1c2440;
    --fond: #111214;
    --surface: #18191c;
    --encre: #eceef1;
    --encre-2: #b4b9c1;
    --encre-3: #868c95;
    --trait: #2a2c31;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100vh; display: flex; flex-direction: column;
  background: var(--fond); color: var(--encre);
  font: 17px/1.65 var(--police);
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
a { color: var(--accent); text-underline-offset: 3px; }
img { max-width: 100%; height: auto; display: block; }
.conteneur { width: 100%; max-width: var(--large); margin: 0 auto; padding: 0 24px; }
.visuellement-cache { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* En-tête */
.entete { border-bottom: 1px solid var(--trait); background: color-mix(in srgb, var(--surface) 80%, transparent); }
.entete .conteneur { display: flex; align-items: center; gap: 12px; min-height: 68px; }
.marque { display: inline-flex; align-items: center; gap: 12px; color: var(--encre); text-decoration: none; font-weight: 650; letter-spacing: -.01em; font-size: 17px; }
.monogramme {
  width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center;
  background: var(--encre); color: var(--fond); font-weight: 700; font-size: 16px; letter-spacing: 0;
}
.entete .domaine { margin-left: auto; color: var(--encre-3); font: 13px/1 var(--police-mono); }

/* Contenu */
main { flex: 1; padding: 64px 0 80px; }
.chantier { padding: 40px 0 24px; }
.etiquette {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 999px;
  background: var(--accent-doux); color: var(--accent); font-size: 13px; font-weight: 600; letter-spacing: .02em;
}
.etiquette::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; animation: pouls 2.4s ease-in-out infinite; }
@keyframes pouls { 50% { opacity: .3; } }
@media (prefers-reduced-motion: reduce) { .etiquette::before { animation: none; } }
h1 { font-size: clamp(38px, 7vw, 60px); line-height: 1.05; letter-spacing: -.035em; margin: 22px 0 18px; font-weight: 750; }
.chapeau { font-size: 19px; color: var(--encre-2); max-width: 34em; margin: 0; }
.barre { margin-top: 44px; height: 4px; border-radius: 4px; background: var(--trait); overflow: hidden; max-width: 320px; }
.barre span { display: block; height: 100%; width: 38%; background: var(--accent); border-radius: inherit; }

/* Actualités */
#actualites { margin-top: 56px; }
.titre-section { font-size: 13px; text-transform: uppercase; letter-spacing: .12em; color: var(--encre-3); font-weight: 650; margin: 0 0 20px; }
.articles { display: grid; gap: 22px; }
.article {
  background: var(--surface); border: 1px solid var(--trait); border-radius: var(--rayon); overflow: hidden;
}
.article img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; background: var(--trait); }
.article .corps { padding: 24px 26px 26px; }
.article time { color: var(--encre-3); font-size: 14px; }
.article h2 { font-size: 24px; line-height: 1.25; letter-spacing: -.015em; margin: 4px 0 12px; }
.article p { margin: 0 0 12px; color: var(--encre-2); }
.article p:last-child { margin-bottom: 0; }

/* Pied de page */
.pied { border-top: 1px solid var(--trait); color: var(--encre-3); font-size: 14px; }
.pied .conteneur { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; padding-top: 22px; padding-bottom: 22px; }

/* Page 404 */
.erreur .code { font: 600 15px/1 var(--police-mono); color: var(--accent); letter-spacing: .08em; }
.bouton {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 32px; padding: 12px 20px; border-radius: 10px;
  background: var(--encre); color: var(--fond); text-decoration: none; font-weight: 600; font-size: 15px;
}
.bouton:hover { opacity: .88; }

@media (max-width: 560px) {
  body { font-size: 16px; }
  main { padding: 40px 0 56px; }
  .entete .domaine { display: none; }
  .article .corps { padding: 20px; }
}