:root{--bg:#ffffff;--fg:#0f1b2d;--mut:#5a6577;--line:#e3e7ee;--acc:#1a7f5a;--acc2:#e9f6f0;--card:#f6f8fb}
@media (prefers-color-scheme:dark){:root{--bg:#0d1420;--fg:#e8edf4;--mut:#9aa6b8;--line:#223047;--acc:#3ccf91;--acc2:#12261f;--card:#131c2b}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:var(--acc)}
.in{max-width:1040px;margin:0 auto;padding-inline:20px}
header{border-bottom:1px solid var(--line)}
header .in{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:16px}
.logo{font-weight:800;font-size:20px;letter-spacing:-.02em;color:var(--fg);text-decoration:none}
.logo b{color:var(--acc)}
nav a{color:var(--mut);text-decoration:none;margin-left:18px;font-size:15px}
nav a:hover{color:var(--fg)}
.hero{padding-block:88px 72px}
.hero h1{font-size:clamp(32px,5.4vw,54px);line-height:1.08;letter-spacing:-.03em;margin:0 0 18px;max-width:760px}
.hero p{font-size:19px;color:var(--mut);max-width:640px;margin:0 0 28px}
.btn{display:inline-block;background:var(--acc);color:#fff;padding:12px 22px;border-radius:10px;text-decoration:none;font-weight:600}
.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));padding-block:24px 72px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px}
.card h3{margin:0 0 8px;font-size:18px}
.card p{margin:0;color:var(--mut);font-size:15px}
.doc{padding-block:48px 72px;max-width:780px}
.doc h1{font-size:34px;letter-spacing:-.02em;margin:0 0 6px}
.doc h2{font-size:22px;margin:40px 0 8px}
.doc .upd{color:var(--mut);margin:0 0 28px}
.doc hr{border:0;border-top:1px solid var(--line);margin:48px 0}
footer{border-top:1px solid var(--line);color:var(--mut);font-size:14px}
footer .in{padding-block:28px;display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between}
footer a{color:var(--mut)}