:root{--bg:#fff;--ink:#13232e;--soft:#4b5d69;--brand:#0b4f6c;--line:#dde5ea}
@media (prefers-color-scheme:dark){:root{--bg:#0f1a21;--ink:#e8eef2;--soft:#a9b8c2;--brand:#4fa3c7;--line:#24363f}}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
.wrap{max-width:820px;margin:0 auto;padding:40px 16px 64px}
a{color:var(--brand)}
h1{font-size:34px;line-height:1.2}
h2{font-size:22px;margin-top:36px;border-top:1px solid var(--line);padding-top:24px}
p,li{color:var(--soft)}
.back{display:inline-block;margin-bottom:24px;text-decoration:none;font-weight:600}