:root{--bg:#fff;--ink:#1a1d29;--mute:#6b7083;--line:#e6e8f0;--acc:#5b4bff;--soft:#f4f2ff}
@media (prefers-color-scheme:dark){:root{--bg:#0f1117;--ink:#e9ebf2;--mute:#9095a8;--line:#2a2e3b;--acc:#8b7fff;--soft:#1c1934}}
*{box-sizing:border-box}body{margin:0;font:16px/1.6 system-ui,Segoe UI,sans-serif;background:var(--bg);color:var(--ink)}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line)}header .wrap{display:flex;justify-content:space-between;align-items:center;height:64px;gap:12px}
.logo{font-weight:800;font-size:20px;color:var(--ink);text-decoration:none}.logo b{color:var(--acc)}
nav a{color:var(--mute);text-decoration:none;margin-left:16px;font-size:14px}
.hero{padding:72px 0 48px}.hero h1{font-size:40px;line-height:1.15;margin:0 0 16px}.hero p{font-size:19px;color:var(--mute);max-width:640px}
.btn{display:inline-block;background:var(--acc);color:#fff;padding:12px 22px;border-radius:10px;text-decoration:none;margin-top:12px}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));margin:24px 0 56px}
.card{background:var(--soft);border-radius:14px;padding:20px}.card h3{margin:0 0 6px;font-size:17px}.card p{margin:0;color:var(--mute);font-size:15px}
h2{font-size:26px;margin:40px 0 8px}
.doc{padding:40px 0 64px}.doc h1{font-size:30px}.doc h2{font-size:20px;margin-top:28px}.doc .upd{color:var(--mute)}
footer{border-top:1px solid var(--line);padding:28px 0;color:var(--mute);font-size:14px}footer a{color:var(--mute)}
.todo{background:#ffe9a8;color:#5a4400;padding:0 4px;border-radius:4px}
@media(max-width:600px){.hero h1{font-size:30px}nav a{margin-left:10px}}