:root{color-scheme:light dark;--fg:#111;--bg:#fff;--muted:#666;--line:#e5e5e5}
@media (prefers-color-scheme:dark){:root{--fg:#f2f2f2;--bg:#111;--muted:#999;--line:#2a2a2a}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 -apple-system,BlinkMacSystemFont,"SF Pro Text",Helvetica,Arial,sans-serif}
main{max-width:680px;margin:0 auto;padding:48px 24px 80px}
h1{font-size:2rem;margin:0 0 .25em}h2{font-size:1.3rem;margin:2em 0 .5em}h3{font-size:1.05rem;margin:1.5em 0 .25em}
p,li{margin:.5em 0}.muted{color:var(--muted)}a{color:inherit}
nav{display:flex;gap:20px;margin-bottom:40px;font-size:.95rem}
footer{margin-top:64px;padding-top:16px;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}