:root{--bg:#fff;--fg:#0f172a;--muted:#475569;--line:#e2e8f0;--accent:#2563eb;--soft:#f1f5f9}
@media(prefers-color-scheme:dark){:root{--bg:#0b1120;--fg:#f1f5f9;--muted:#94a3b8;--line:#1e293b;--accent:#60a5fa;--soft:#111a2e}}
*{box-sizing:border-box}
body{margin:0;font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--fg)}
a{color:var(--accent)}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line)}
header .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;padding-top:16px;padding-bottom:16px}
.logo{font-weight:700;font-size:1.2rem;color:var(--fg);text-decoration:none}
.logo span{color:var(--accent)}
nav a{margin-left:20px;color:var(--muted);text-decoration:none;font-size:.95rem}
nav a:hover{color:var(--accent)}
.hero{padding:80px 20px 64px}
.hero h1{font-size:clamp(2rem,5vw,3.2rem);line-height:1.15;margin:0 0 16px;max-width:760px}
.hero p{font-size:1.15rem;color:var(--muted);max-width:640px;margin:0 0 28px}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:12px 24px;border-radius:8px;text-decoration:none;font-weight:600}
section{padding:56px 0}
section.alt{background:var(--soft)}
h2{font-size:1.8rem;margin:0 0 12px}
.lead{color:var(--muted);max-width:680px;margin:0 0 32px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.card{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:24px}
.card h3{margin:0 0 8px;font-size:1.1rem}
.card p{margin:0;color:var(--muted);font-size:.95rem}
ol.steps{padding-left:20px;max-width:680px}
ol.steps li{margin-bottom:10px}
footer{border-top:1px solid var(--line);padding:32px 0;color:var(--muted);font-size:.9rem}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
footer a{color:var(--muted);margin-left:16px}
.doc{padding:48px 20px;max-width:800px}
.doc h1{margin-top:0}
.doc h2{font-size:1.3rem;margin-top:32px}