:root{--bg:#f7f7f5;--fg:#1c1f1d;--muted:#5b625e;--card:#fff;--line:#e3e5e2;--accent:#0a6ccf}
@media (prefers-color-scheme:dark){:root{--bg:#141816;--fg:#eceeed;--muted:#a3aaa6;--card:#1d2220;--line:#2d3431;--accent:#5aa9ff}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
main{max-width:760px;margin:0 auto;padding:40px 16px 64px}
header{display:flex;align-items:center;gap:14px;margin-bottom:28px}
header img{width:56px;height:56px;border-radius:13px}
header a{color:inherit;text-decoration:none}
h1{font-size:30px;line-height:1.2;margin:0 0 6px}
h2{font-size:21px;margin:32px 0 8px}
p,li{color:var(--fg)}
.muted{color:var(--muted)}
a{color:var(--accent)}
nav{display:flex;gap:18px;flex-wrap:wrap;margin:8px 0 32px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:16px 0}
footer{margin-top:48px;padding-top:16px;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}