:root{--ink:#14181d;--ink-2:#4a545f;--ground:#fff;--line:#e2e8ee;--accent:#10596b}
@media (prefers-color-scheme:dark){
  :root{--ink:#e8edf1;--ink-2:#a9b5c0;--ground:#11161a;--line:#2b333b;--accent:#5fb6cb}
}
*{box-sizing:border-box}
body{margin:0;background:var(--ground);color:var(--ink);
  font:16px/1.6 ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}
.wrap{max-width:680px;margin:0 auto;padding:48px 20px 72px}
h1{font-size:30px;line-height:1.2;margin:0 0 8px}
h2{font-size:19px;margin:32px 0 8px}
p,li{color:var(--ink-2)}
a{color:var(--accent)}
nav{border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:32px;
  display:flex;gap:18px;flex-wrap:wrap}
nav a{text-decoration:none;font-weight:600}
footer{border-top:1px solid var(--line);margin-top:48px;padding-top:16px;font-size:14px}