:root{--bg:#fbfbfa;--fg:#1d1d1b;--muted:#5c5c57;--line:#e3e2de;--link:#1f5fbf}
@media (prefers-color-scheme:dark){:root{--bg:#161615;--fg:#ececea;--muted:#a3a39d;--line:#2e2e2b;--link:#8ab4f8}}
*{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:680px;margin:0 auto;padding:48px 16px 64px}
h1{font-size:1.6rem;line-height:1.25;margin:0 0 8px}
h2{font-size:1.1rem;margin:32px 0 8px}
p,li{color:var(--fg)}
.sub{color:var(--muted);margin:0 0 32px}
a{color:var(--link)}
footer{margin-top:48px;padding-top:16px;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}