:root{--bg:#fbf8f3;--fg:#1d1b22;--muted:#5f5a66;--accent:#6b3fd4;--card:#fff;--line:#e7e1d8}
@media (prefers-color-scheme:dark){:root{--bg:#141218;--fg:#f1eef5;--muted:#a9a3b3;--accent:#b596ff;--card:#1e1b24;--line:#2e2a36}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
main{max-width:720px;margin:0 auto;padding:40px 16px 64px}
header{display:flex;align-items:center;gap:14px;margin-bottom:32px}
header img{width:56px;height:56px;border-radius:13px}
header a{color:inherit;text-decoration:none;font-weight:700;font-size:20px}
nav{margin-left:auto;display:flex;gap:16px;flex-wrap:wrap;font-size:15px}
nav a{color:var(--muted);font-weight:500}
h1{font-size:36px;line-height:1.15;margin:0 0 12px}
h2{font-size:21px;margin:32px 0 8px}
a{color:var(--accent)}
.lede{font-size:20px;color:var(--muted);margin:0 0 28px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:14px 0}
ul{padding-left:20px}
footer{margin-top:48px;padding-top:16px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
@media (max-width:520px){header{flex-wrap:wrap}nav{margin-left:0;width:100%}h1{font-size:30px}}