:root{--bg:#faf9f6;--fg:#1f1e1b;--muted:#5d5b55;--line:#e3e1da;--accent:#3987e5}
@media (prefers-color-scheme:dark){:root{--bg:#161614;--fg:#ecebe6;--muted:#a9a79f;--line:#2e2d29;--accent:#6aa7f0}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif}
main{max-width:720px;margin:0 auto;padding:48px 16px 64px}
h1{font-size:1.8rem;line-height:1.2;margin:0 0 .25rem}
h2{font-size:1.15rem;margin:2rem 0 .5rem}
p,li{color:var(--fg)}
.muted{color:var(--muted);font-size:.92rem}
a{color:var(--accent)}
nav{display:flex;gap:16px;border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:28px;font-size:.95rem}
code{font-size:.9em}