:root{--bg:#fbfaf7;--fg:#1d1d1b;--muted:#5d5b55;--line:#e3e0d8;--link:#1f5fbf}
@media (prefers-color-scheme:dark){:root{--bg:#161614;--fg:#ecebe6;--muted:#a6a39b;--line:#33322e;--link:#8ab4ff}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
main{max-width:720px;margin:0 auto;padding:40px 16px 64px}
h1{font-size:28px;line-height:1.25;margin:0 0 4px}
h2{font-size:19px;margin:32px 0 8px}
.sub{color:var(--muted);margin:0 0 24px}
section+section{border-top:1px solid var(--line);margin-top:40px;padding-top:8px}
a{color:var(--link)}
ul{padding-left:20px}
footer{color:var(--muted);font-size:14px;margin-top:48px;border-top:1px solid var(--line);padding-top:16px}