:root{color-scheme:light dark;--bg:#fff;--fg:#1d1d1f;--muted:#6e6e73;--line:#e5e5ea}
@media (prefers-color-scheme:dark){:root{--bg:#000;--fg:#f5f5f7;--muted:#98989d;--line:#2c2c2e}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.55 -apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Helvetica,Arial,sans-serif}
main{max-width:40rem;margin:0 auto;padding:4rem 1.5rem}h1{font-size:2.125rem;line-height:1.15;margin:0 0 1rem}h2{font-size:1.25rem;margin:2.5rem 0 .5rem}
p,li{color:var(--fg)}.muted{color:var(--muted)}a{color:inherit}nav{display:flex;gap:1.25rem;margin-top:3rem;padding-top:1.25rem;border-top:1px solid var(--line);font-size:15px}