:root{--bg:#fff;--fg:#1f2328;--muted:#59636e;--line:#d1d9e0;--link:#0969da}
@media (prefers-color-scheme:dark){:root{--bg:#0d1117;--fg:#e6edf3;--muted:#9198a1;--line:#3d444d;--link:#4493f8}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
main{max-width:760px;margin:0 auto;padding:32px 16px 48px}
h1{font-size:28px;line-height:1.25;margin:0 0 4px}
h2{font-size:19px;margin:28px 0 8px}
p,li{color:var(--fg)}
.sub{color:var(--muted);margin:0 0 24px}
a{color:var(--link)}
nav{display:flex;flex-wrap:wrap;gap:16px;padding-bottom:12px;margin-bottom:24px;border-bottom:1px solid var(--line)}
nav a{text-decoration:none;font-weight:600}
footer{margin-top:40px;padding-top:12px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
code{font-size:14px}