:root {
  --bg: #0b1020;
  --panel: #0f1630;
  --card: #121b3d;
  --text: #e7ecff;
  --muted: #b9c3ff;
  --brand: #5aa7ff;
  --brand-2: #6be0ff;
  --chip: #1a244b;
  --ring: rgba(91, 168, 255, 0.6);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fc;
    --panel: #ffffff;
    --card: #f4f7ff;
    --text: #0e1325;
    --muted: #4d5a7a;
    --brand: #2563eb;
    --brand-2: #22c1dc;
    --chip: #e9eefc;
    --ring: rgba(37, 99, 235, 0.3);
    --shadow: 0 8px 24px rgba(14, 19, 37, 0.12);
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 800px at 10% -10%, rgba(90,167,255,0.12), transparent 40%),
              radial-gradient(1000px 700px at 110% 10%, rgba(107,224,255,0.10), transparent 40%),
              var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}



.container {
  width: min(1120px, 92vw);
  margin-inline: auto;
}

.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* Header */
.site-header { position: sticky; top: 0; z-index: 20; backdrop-filter: saturate(120%) blur(8px); background: color-mix(in oklab, var(--bg), transparent 30%); border-bottom: 1px solid color-mix(in oklab, var(--text), transparent 92%); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-weight: 700; letter-spacing: 0.1px; }
.brand-mark { width: 26px; height: 26px; fill: var(--brand); filter: drop-shadow(0 2px 6px rgba(90,167,255,0.45)); }
.brand-name { font-size: 16px; }
.top-nav { display: flex; gap: 18px; }
.top-nav a { color: var(--muted); text-decoration: none; font-weight: 500; padding: 8px 10px; border-radius: 10px; }
.top-nav a:hover, .top-nav a:focus-visible { color: var(--text); background: color-mix(in oklab, var(--chip), transparent 30%); outline: none; }
.top-nav a.active { color: var(--text); background: color-mix(in oklab, var(--brand), transparent 84%); }

/* Hero */
.hero { padding: 56px 0 22px; }
.hero-inner { text-align: center; }
.eyebrow { display: inline-block; padding: 6px 10px; background: var(--chip); color: var(--muted); border: 1px solid color-mix(in oklab, var(--text), transparent 86%); border-radius: 999px; font-size: 12px; letter-spacing: .3px; }
.hero h1 { margin: 12px 0 8px; font-size: clamp(28px, 4vw, 44px); line-height: 1.08; letter-spacing: -0.02em; }
.subtitle { margin: 0 auto; max-width: 760px; color: var(--muted); font-size: clamp(14px, 2.4vw, 18px); }

/* Quick chips */
.quick-links { display: flex; flex-wrap: wrap; gap: 10px; padding: 18px 0 4px; }
.chip { text-decoration: none; color: var(--text); background: var(--chip); padding: 8px 12px; border-radius: 999px; border: 1px solid color-mix(in oklab, var(--text), transparent 86%); font-size: 13px; }
.chip:hover, .chip:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--ring); }

/* Cards grid */
.cards-grid { display: grid; gap: 18px; padding: 22px 0 36px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card { position: relative; display: grid; background: var(--card); border-radius: 18px; overflow: clip; text-decoration: none; color: inherit; box-shadow: var(--shadow); transform: translateZ(0); }
.card-media { position: relative; aspect-ratio: 16/14; overflow: hidden; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.02); transition: transform .45s cubic-bezier(.22,.61,.36,1); will-change: transform; }
.card-overlay { display: grid; gap: 8px; padding: 16px; background: linear-gradient(180deg, color-mix(in oklab, var(--card), transparent 25%), color-mix(in oklab, var(--card), transparent 0%)); }
.card h3 { margin: 0; font-size: clamp(16px, 2.5vw, 20px); line-height: 1.25; letter-spacing: -.2px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.badge { align-self: start; justify-self: start; font-size: 12px; padding: 6px 10px; border-radius: 999px; background: color-mix(in oklab, var(--brand), var(--brand-2) 30%); color: #051022; font-weight: 700; letter-spacing: .3px; }

/* Hover / Focus interactions */
.card:where(:hover, :focus-visible) .card-media img { transform: scale(1.06); }
.card:where(:hover, :focus-visible) { outline: none; box-shadow: 0 0 0 3px var(--ring), var(--shadow); }

/* CTA */
.cta { padding: 40px 0 80px; }
.cta-inner { text-align: center; background: linear-gradient(180deg, color-mix(in oklab, var(--brand), transparent 88%), color-mix(in oklab, var(--bg), transparent 0%)); border: 1px solid color-mix(in oklab, var(--text), transparent 88%); border-radius: 22px; padding: clamp(18px, 4vw, 34px); box-shadow: var(--shadow); }
.cta h2 { margin: 0 0 8px; font-size: clamp(22px, 4vw, 30px); }
.cta p { margin: 0 0 18px; color: var(--muted); }
.btn { display: inline-block; padding: 12px 18px; border-radius: 12px; background: linear-gradient(90deg, var(--brand)); color: #051022; text-decoration: none; font-weight: 700; box-shadow: 0 8px 20px rgba(86, 171, 255, 0.35); }
.btn:hover, .btn:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--ring), 0 8px 20px rgba(86,171,255,.45); }

/* Footer */
.site-footer { border-top: 1px solid color-mix(in oklab, var(--text), transparent 90%); background: color-mix(in oklab, var(--bg), transparent 10%); }
.footer-inner { display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: center; justify-content: space-between; padding: 16px 0; color: var(--muted); }
.back-top { color: var(--muted); text-decoration: none; border: 1px dashed color-mix(in oklab, var(--text), transparent 80%); padding: 6px 10px; border-radius: 999px; }
.back-top:hover, .back-top:focus-visible { color: var(--text); border-style: solid; outline: none; }

/* Responsive ajustements fins */
@media (max-width: 560px) {
  .header-inner { gap: 12px; }
  .top-nav { gap: 6px; overflow:auto; padding-bottom: 6px; }
  .top-nav a { padding: 8px 10px; font-size: 14px; white-space: nowrap; }
}

/* Accessibilité / préférences */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* ====== Filtrage ====== */
.card.is-hidden { display: none; }
.chip.active { box-shadow: 0 0 0 3px var(--ring) inset; }

.text-center {
    text-align: center !important;
}