:root {
  --ground: #0d1320; --card: #182136; --line: #263250;
  --ink: #e8ebf2; --ink-dim: #9aa5bd; --amber: #e5a63b;
}
@media (prefers-color-scheme: light) {
  :root { --ground: #f4f5f8; --card: #fff; --line: #d3d9e3; --ink: #1a2233; --ink-dim: #5a6579; --amber: #b07514; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--ground); color: var(--ink);
  font-family: 'Segoe UI', -apple-system, Roboto, Arial, sans-serif;
  font-size: 16px; line-height: 1.65;
}
.doc { max-width: 780px; margin: 0 auto; padding: 40px 22px 80px; }
.doc a { color: var(--amber); }
h1 { font-family: Georgia, serif; font-weight: 500; font-size: 28px; line-height: 1.25; margin: 18px 0 6px; }
h2 { font-family: Georgia, serif; font-weight: 500; font-size: 20px; margin: 34px 0 10px; }
.meta { color: var(--ink-dim); font-size: 14px; margin-bottom: 26px; }
.back { font-size: 14px; }
p, li { color: var(--ink); }
li { margin: 6px 0; }
.req { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 18px 22px; font-size: 15px; }
.foot { margin-top: 50px; color: var(--ink-dim); font-size: 14px; border-top: 1px solid var(--line); padding-top: 18px; }