:root { --bg:#0b0f1a; --ink:#f4f7ff; --accent:#7dd3fc; --soft:#a5b4fc; --panel:rgba(255,255,255,.06); }
*{box-sizing:border-box}
body{margin:0; font-family: ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial; background:linear-gradient(160deg,#0b0f1a,#111827); color:var(--ink);}
.container{max-width:1024px;margin:0 auto;padding:28px}
.hero{padding:56px 18px;text-align:center}
h1{font-size:44px;line-height:1.1;margin:6px 0 12px}
h2{font-size:28px;margin:18px 0 6px}
p.lead{font-size:18px;opacity:.92;margin:8px 0 20px}
.btn{display:inline-block;padding:14px 22px;border-radius:999px;text-decoration:none;color:#0b0f1a;background:var(--accent);font-weight:700;margin:8px 6px;box-shadow:0 10px 20px rgba(125,211,252,.25)}
.btn.secondary{background:transparent;border:2px solid var(--soft);color:var(--ink)}
.btn.disabled{opacity:.45;pointer-events:none;cursor:not-allowed}
.row{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}
.card{grid-column:span 12;background:var(--panel);border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:20px}
@media(min-width:900px){ .card.span6{grid-column:span 6} }
small.muted{opacity:.7}
footer{opacity:.8;text-align:center;padding:32px}
.code{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;background:#0f172a;padding:8px 10px;border-radius:8px}
hr{border:0;border-top:1px solid rgba(255,255,255,.15);margin:24px 0}
input,textarea{width:100%;padding:12px;border-radius:10px;border:1px solid #394150;background:#0f172a;color:#fff}
.badge{display:inline-block;padding:4px 10px;font-size:12px;border-radius:999px;border:1px solid rgba(255,255,255,.2);margin-left:8px;opacity:.85}