:root{--bg:#F1F2F4;--surface:#FFFFFF;--ink:#14171C;--muted:#5B616B;--line:#DDE0E5;--accent:#1560BD}
@media (prefers-color-scheme: dark){:root{--bg:#0F1114;--surface:#181B20;--ink:#EEF0F3;--muted:#9AA0A8;--line:#2A2F36;--accent:#5CB2FF}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif}
main{max-width:720px;margin:0 auto;padding:32px 16px 64px}
h1{font:700 34px/1.1 "Arial Narrow",Arial,sans-serif;text-transform:uppercase;margin:8px 0 4px}
h2{font-size:19px;margin:28px 0 6px}
p,li{max-width:65ch} a{color:var(--accent)}
.meta{color:var(--muted);font-size:14px}
.back{font-weight:600;text-decoration:none}
.box{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:16px;margin:16px 0}