:root{--ink:#1d1f2e;--ink2:#5d6070;--line:#e4e6ee;--soft:#f6f7fb;--brand:#3b5bdb;--ok:#0a9a5c;--bg:#fff}
@media (prefers-color-scheme:dark){:root{--ink:#eef0f6;--ink2:#a6a9c0;--line:#33364a;--soft:#22243a;--bg:#181a28;--brand:#7b93ff}}
*{box-sizing:border-box}html,body{margin:0}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--brand)}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}
header.top{border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.02em;text-decoration:none;color:var(--ink);font-size:18px}
.mark{width:28px;height:28px;border-radius:8px;background:var(--ink);color:var(--bg);display:grid;place-items:center;font-size:15px}
nav a{color:var(--ink2);text-decoration:none;margin-left:20px;font-size:15px}nav a:hover{color:var(--ink)}
.hero{padding:72px 0 40px}
.hero h1{font-size:44px;line-height:1.1;letter-spacing:-.03em;margin:0 0 16px}
.hero p{font-size:19px;color:var(--ink2);max-width:600px;margin:0 0 28px}
.btn{display:inline-block;background:var(--ink);color:var(--bg);padding:12px 20px;border-radius:10px;text-decoration:none;font-weight:700}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;padding:24px 0 64px}
.card{border:1px solid var(--line);border-radius:14px;padding:20px;background:var(--soft)}
.card h3{margin:0 0 6px;font-size:17px}.card p{margin:0;color:var(--ink2);font-size:15px}
.doc{padding:48px 0 72px}.doc h1{font-size:34px;letter-spacing:-.02em;margin:0 0 4px}
.doc .meta{color:var(--ink2);margin:0 0 32px}
.doc h2{font-size:21px;margin:36px 0 8px}
.steps{counter-reset:s;list-style:none;padding:0}
.steps li{counter-increment:s;position:relative;padding:0 0 22px 48px}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:32px;height:32px;border-radius:50%;background:var(--ink);color:var(--bg);display:grid;place-items:center;font-weight:700}
.note{background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
footer{border-top:1px solid var(--line);color:var(--ink2);font-size:14px}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;padding:24px 20px}
footer a{color:var(--ink2)}
@media (max-width:600px){.hero h1{font-size:32px}nav a{margin-left:12px}}