/* Exoum design system (responsive + PWA-ready) */
:root {
  --bg: #0b0b0c;
  --text: #f2f2f3;
  --muted: #b8b8bd;
  --card: #141416;
  --line: #26262a;
  --brand: #2aa6ff;
  --brand-ink: #051b2b;
  --shadow: 0 6px 24px rgba(0,0,0,.28);
  --radius: 14px;
  --space-1: clamp(.5rem, 1vw, .75rem);
  --space-2: clamp(.75rem, 1.2vw, 1rem);
  --space-3: clamp(1rem, 2vw, 1.5rem);
  --space-4: clamp(1.25rem, 3vw, 2rem);
  --space-5: clamp(2rem, 4vw, 3rem);
  --maxw: 1100px;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --text: #121216;
    --muted: #5e5e69;
    --card: #f8f8fb;
    --line: #eaeaf0;
    --brand: #2aa6ff;
    --brand-ink: #051b2b;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Inter, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 600px at 10% -10%, rgba(42,166,255,.08), transparent 40%),
              radial-gradient(1000px 500px at 90% 10%, rgba(0,119,255,.07), transparent 40%),
              var(--bg);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
a.link { color: var(--brand); text-underline-offset: 3px; text-decoration: underline; }
.visually-hidden { position: absolute; width:1px; height:1px; margin:-1px; border:0; padding:0; clip:rect(0 0 0 0); overflow:hidden; }

.site-header {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  background: color-mix(in oklab, var(--bg) 85%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.brand { display: inline-flex; align-items: center; gap: .6rem; font-weight: 700; letter-spacing: .2px; }
.nav { display: flex; align-items: center; gap: var(--space-2); }
.nav a { padding: .4rem .8rem; border-radius: 8px; }
.nav a:hover { background: var(--card); }
.nav-toggle { display: none; }

@keyframes fadeInUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; align-items:center; gap:.5rem; background: var(--card); color: var(--text); border:1px solid var(--line); padding:.5rem .75rem; border-radius:10px; }
  .nav { display: none; position: absolute; right: var(--space-3); top: 62px; background: var(--card); border:1px solid var(--line); border-radius: 12px; padding: .5rem; box-shadow: var(--shadow); }
  .nav.open { display: grid; }
  .nav a { padding:.6rem .8rem; }
}

.btn { display: inline-flex; align-items: center; justify-content: center; gap:.6rem;
  padding: .8rem 1.1rem; border-radius: 12px; border: 1px solid var(--line); background: var(--brand); color: var(--brand-ink);
  font-weight: 700; letter-spacing: .2px; box-shadow: 0 6px 20px rgba(0,119,255,.25);
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 8px 28px rgba(0,119,255,.35); }
.btn.ghost { background: transparent; color: var(--text); border-color: var(--line); box-shadow: none; }
.btn.small { padding:.6rem .9rem; font-weight:600; }

main { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--space-3) var(--space-5); }
.hero { padding: var(--space-5) var(--space-3); text-align: center; }
.hero-inner { max-width: 860px; margin: 0 auto; }
.hero h1 { font-weight: 800; font-size: clamp(2.5rem, 3vw + 1rem, 3.8rem); margin-bottom: .5rem; animation: fadeInUp 700ms ease-out both; }
.lead { font-size: clamp(1rem, .8vw + .7rem, 1.25rem); font-weight: 400; color: var(--muted); margin-top: 0; animation: fadeInUp 800ms ease-out both; }
.cta { display:flex; gap: var(--space-2); justify-content:center; margin-bottom: var(--space-2); animation: fadeInUp 900ms ease-out both; }
.badges { display:flex; flex-wrap: wrap; gap: .7rem 1rem; justify-content:center; color: var(--muted); animation: fadeInUp 1000ms ease-out both; }

.panel { padding: var(--space-5) 0; }
.panel.alt { background: linear-gradient(180deg, transparent, color-mix(in oklab, var(--card) 40%, transparent) 100%); border: 0; border-radius: var(--radius); padding: var(--space-5) var(--space-3); }
.pill-row { display:flex; flex-wrap: wrap; gap: .5rem; margin-top: var(--space-2); }
.pill { background: var(--card); border:1px solid var(--line); border-radius: 999px; padding: .45rem .8rem; color: var(--muted); }

.steps { display:grid; gap: .75rem; counter-reset: step; margin: var(--space-3) 0; }
.steps li { background: var(--card); border:1px solid var(--line); border-radius: 12px; padding: .9rem 1rem; list-style:none; }
.steps li::before { counter-increment: step; content: counter(step); display:inline-grid; place-items:center; width: 24px; height:24px; margin-right:.6rem; border-radius: 50%; background: var(--brand); color: var(--brand-ink); font-weight:700; }

.grid { display: grid; gap: var(--space-3); grid-template-columns: repeat(4, 1fr); }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.grid.three { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 1024px) { .grid { grid-template-columns: repeat(2, 1fr); } .grid.two, .grid.three { grid-template-columns: 1fr; } }
@media (max-width: 640px) { .grid { grid-template-columns: 1fr; } }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: var(--space-3); box-shadow: var(--shadow); }
.card h3 { margin-top: 0; }

.form { display:grid; gap: .8rem; max-width: 560px; }
.form label { display:grid; gap:.3rem; }
.form input, .form textarea {
  background: var(--card); border:1px solid var(--line); border-radius: 10px; padding:.8rem 1rem; color: var(--text);
}
.form button { justify-self: start; }

.site-footer { border-top: 1px solid var(--line); padding: var(--space-4) var(--space-3); }
.footer-grid { display:grid; gap: var(--space-3); grid-template-columns: 2fr 1fr 1fr; align-items:start; max-width: var(--maxw); margin: 0 auto; }
.footer-grid nav, .footer-grid .social { display:grid; gap:.5rem; }
.subtle { color: var(--muted); margin-top:.5rem; }
.tiny { text-align:center; color: var(--muted); margin-top: var(--space-3); font-size:.9rem; }

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