:root{--bg:#f8f9fc;--card:#fff;--ink:#1a1d2e;--muted:#5b6078;--brand:#4f46e5;--line:#e3e6f0}
@media (prefers-color-scheme:dark){:root{--bg:#12141f;--card:#1b1e2e;--ink:#eef0fa;--muted:#a3a8c3;--brand:#8b85ff;--line:#2b2f45}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
header{padding:20px 16px;border-bottom:1px solid var(--line);background:var(--card)}
header a{color:var(--brand);font-weight:700;font-size:20px;text-decoration:none}
main{max-width:760px;margin:0 auto;padding:24px 16px 64px}
h1{font-size:28px;line-height:1.25;margin:8px 0 4px}
h2{font-size:20px;margin:32px 0 8px}
li{margin:4px 0}
ul,ol{padding-left:22px}
.muted{color:var(--muted);font-size:14px}
a{color:var(--brand)}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin:16px 0}
footer{max-width:760px;margin:0 auto;padding:0 16px 40px;color:var(--muted);font-size:14px}
footer a{margin-right:16px}