:root{color-scheme:light dark;--bg:#fff;--fg:#1a1a1c;--muted:#6b6b72;--accent:#5b59d6}
@media (prefers-color-scheme:dark){:root{--bg:#1a1a1c;--fg:#f5f5f7;--muted:#a1a1aa;--accent:#b9b8ff}}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 -apple-system,system-ui,sans-serif}
main{max-width:680px;margin:0 auto;padding:48px 20px}
h1{font-size:32px;margin:0 0 4px}h2{font-size:20px;margin:32px 0 8px}
p,li{color:var(--fg)}.muted{color:var(--muted)}a{color:var(--accent)}