:root {
  --bg: #0f172a;           /* slate-900 */
  --surface: #111827;      /* gray-900 */
  --card: #0b1220;
  --text: #f8fafc;         /* slate-50 */
  --muted: #cbd5e1;        /* slate-300 */
  --brand: #38bdf8;        /* sky-400 */
  --accent: #34d399;       /* emerald-400 */
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: linear-gradient(180deg, var(--bg), #0a0f1f 60%);
  color: var(--text);
  line-height: 1.6;
}

.container { width: min(1100px, 92%); margin: 0 auto; }

.skip-link {
  position: absolute; left: -9999px; top: -9999px;
}
.skip-link:focus {
  left: 1rem; top: 1rem; background: var(--brand); color: #04121a; padding: .5rem .75rem; border-radius: .4rem;
}

.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(4, 10, 20, 0.6);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between; padding: .75rem 0;
}
.brand { display: inline-flex; align-items: center; gap: .6rem; color: var(--text); text-decoration: none; font-weight: 800; }
.brand-mark { width: 34px; height: 34px; }
.brand-mark.small { width: 28px; height: 28px; }
.brand-text { letter-spacing: .3px; }

.nav-toggle { display: none; background: transparent; border: 0; cursor: pointer; }
.nav-toggle-bar { display: block; width: 22px; height: 2px; background: var(--text); margin: 4px 0; }

.nav .nav-list { display: flex; gap: 1rem; list-style: none; padding: 0; margin: 0; }
.nav a { color: var(--muted); text-decoration: none; padding: .5rem .7rem; border-radius: .4rem; }
.nav a:hover, .nav a:focus { background: rgba(255,255,255,.06); color: var(--text); }

.hero { padding: 7rem 0 4rem; background: radial-gradient(1200px 400px at 50% -80px, rgba(56,189,248,.15), transparent 60%); }
.hero-inner { text-align: center; }
h1 { font-size: clamp(2rem, 3.8vw, 3.2rem); line-height: 1.15; margin: 0 0 1rem; }
h2 { font-size: clamp(1.3rem, 2.2vw, 1.8rem); margin: 1.2rem 0 .5rem; }
h3 { margin: 1rem 0 .5rem; }

.btn { display: inline-block; padding: .8rem 1.1rem; border-radius: .6rem; border: 1px solid rgba(255,255,255,.16); text-decoration: none; font-weight: 600; }
.btn-primary { background: var(--brand); color: #04121a; border-color: transparent; }
.btn-outline { color: var(--text); background: transparent; }
.btn + .btn { margin-left: .6rem; }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; padding: 2rem 0; }
.feature { background: rgba(255,255,255,.03); border: 1px solid rgba(255,255,255,.06); border-radius: .9rem; padding: 1rem; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; padding: 1rem 0 2rem; }
.card { background: var(--card); border: 1px solid rgba(255,255,255,.08); border-radius: .9rem; padding: 1rem; }
.card-link { display: inline-block; margin-top: .5rem; color: var(--brand); }

.cta-banner { background: linear-gradient(90deg, rgba(56,189,248,.15), rgba(52,211,153,.12)); border-top: 1px solid rgba(255,255,255,.06); border-bottom: 1px solid rgba(255,255,255,.06); }
.cta-inner { text-align: center; padding: 2rem 0; }

.two-col { display: grid; grid-template-columns: 1.2fr .8fr; gap: 1.25rem; padding: 1rem 0 2rem; }
.panel { background: var(--card); border: 1px solid rgba(255,255,255,.08); border-radius: .9rem; padding: 1rem; }

.program-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1rem; padding-bottom: 2rem; }
.program { background: var(--card); border: 1px solid rgba(255,255,255,.08); border-radius: .9rem; padding: 1rem; }

.checklist { padding-left: 1.2rem; }
.checklist li { margin: .4rem 0; }

.site-footer { margin-top: 2rem; border-top: 1px solid rgba(255,255,255,.06); padding: 1.5rem 0; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 1rem; align-items: start; }
.footer-nav { list-style: none; padding: 0; margin: 0; display: grid; gap: .35rem; }
.fineprint { color: var(--muted); font-size: .9rem; }

@media (max-width: 860px) {
  .two-col, .footer-grid { grid-template-columns: 1fr; }
  .nav .nav-list { display: none; }
  .nav-toggle { display: block; }
  .nav[aria-expanded="true"] .nav-list { display: grid; gap: .5rem; padding: .5rem 0 1rem; }
}