:root { --bg:#f7f8fa; --card:#fff; --ink:#15181d; --muted:#5b6472; --line:#e3e6eb; --accent:#1f6feb; }
@media (prefers-color-scheme: dark) { :root { --bg:#0e1116; --card:#161b22; --ink:#e6edf3; --muted:#8b949e; --line:#2b313a; --accent:#4c8dff; } }
* { box-sizing: border-box; }
body { margin:0; font:16px/1.6 system-ui,-apple-system,Segoe UI,sans-serif; background:var(--bg); color:var(--ink); }
header, footer { border-bottom:1px solid var(--line); background:var(--card); }
footer { border-top:1px solid var(--line); border-bottom:0; margin-top:48px; }
.wrap { max-width:880px; margin:0 auto; padding:16px; }
nav { display:flex; gap:16px; flex-wrap:wrap; align-items:center; }
nav .brand { font-weight:700; margin-right:auto; color:var(--ink); text-decoration:none; }
a { color:var(--accent); }
nav a { text-decoration:none; font-size:15px; }
h1 { font-size:32px; line-height:1.2; margin:32px 0 8px; }
h2 { font-size:22px; margin:32px 0 8px; }
.lead { font-size:18px; color:var(--muted); }
.grid { display:grid; gap:16px; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); margin-top:16px; }
.card { background:var(--card); border:1px solid var(--line); border-radius:10px; padding:16px; }
.card b { display:block; margin-bottom:4px; }
table { border-collapse:collapse; width:100%; background:var(--card); }
th, td { border:1px solid var(--line); padding:8px 10px; text-align:left; }
.small { font-size:14px; color:var(--muted); }
footer .links { display:flex; gap:16px; flex-wrap:wrap; font-size:14px; }