:root{--bg:#fbfbfd;--fg:#14161f;--muted:#566074;--card:#fff;--line:#e3e6ee;--accent:#4a5be0;--accent-fg:#fff}
@media (prefers-color-scheme:dark){:root{--bg:#0f1117;--fg:#eceef6;--muted:#9aa3b8;--card:#171a23;--line:#262b38;--accent:#7b8bff;--accent-fg:#0f1117}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--accent)}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header.top{border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;min-height:64px;gap:0 16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.1rem;color:var(--fg);text-decoration:none;min-height:44px}
.brand img{width:28px;height:28px}
nav.top{display:flex;gap:4px}
nav.top a{display:inline-flex;align-items:center;min-height:44px;padding:0 8px;color:var(--muted);text-decoration:none}
nav.top a:hover{color:var(--fg)}
.hero{padding:72px 0 48px}
.hero h1{text-wrap:balance;font-size:clamp(2rem,6vw,3.2rem);line-height:1.12;margin:0 0 20px;letter-spacing:-.02em}
.hero p.lead{font-size:1.2rem;color:var(--muted);max-width:40rem;margin:0 0 28px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 24px;border-radius:10px;background:var(--accent);color:var(--accent-fg);font-weight:600;text-decoration:none}
.btn:hover{opacity:.9}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));margin:0 0 48px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px}
.card h3{margin:0 0 8px;font-size:1.1rem}
.card p{margin:0;color:var(--muted)}
section{margin:0 0 48px}
section h2{font-size:1.6rem;line-height:1.25;margin:0 0 14px;letter-spacing:-.01em}
section p,section li{max-width:44rem}
section p{color:var(--muted)}
ul.list{padding-left:20px;margin:0}
ul.list li{margin:6px 0;color:var(--muted)}
footer.foot{border-top:1px solid var(--line);padding:28px 0 40px;color:var(--muted);font-size:.95rem}
footer.foot .wrap{display:flex;flex-wrap:wrap;gap:8px 24px;align-items:center}
footer.foot a{display:inline-flex;align-items:center;min-height:44px}
.doc{padding:56px 0}
.doc h1{font-size:2rem;margin:0 0 20px}
.doc h2{font-size:1.25rem;margin:28px 0 8px}
.doc p,.doc li{max-width:44rem;color:var(--muted)}