:root{--bg: #0b1220;--bg-soft: #121a2b;--card: #15203a;--text: #e6ebf5;--muted: #8a97b1;--accent: #5b8cff;--ok: #34d399;--err: #f87171;--border: #243049;color-scheme:dark}@media (prefers-color-scheme: light){:root{--bg: #f6f8fc;--bg-soft: #eef2f9;--card: #ffffff;--text: #0f172a;--muted: #64748b;--accent: #2563eb;--border: #e2e8f0;color-scheme:light}}*{box-sizing:border-box}html,body{margin:0;min-height:100%}body{font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:radial-gradient(1200px 600px at 80% -10%,var(--bg-soft),var(--bg)) fixed;color:var(--text);line-height:1.55}main{max-width:760px;margin:0 auto;padding:4rem 1.25rem 2rem}header h1{font-size:2.6rem;margin:0 0 .25rem;letter-spacing:-.02em;background:linear-gradient(90deg,var(--accent),#9db4ff);-webkit-background-clip:text;background-clip:text;color:transparent}.subtitle{color:var(--muted);margin:0 0 2.5rem}.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:1.5rem 1.75rem;box-shadow:0 10px 30px #0000002e}.card h2{margin-top:0;font-size:1.05rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}ul{list-style:none;padding:0;margin:0}li{padding:.35rem 0}.ok{color:var(--ok)}.err{color:var(--err)}.muted{color:var(--muted)}footer{margin-top:3rem}footer p{font-size:.85rem}