:root {
  --paper: #f5f1e6;
  --card: #fdfcf7;
  --border: #d6d0be;
  --ink: #1e3560;
  --ink-soft: #2f4c85;
  --text: #22283a;
  --muted: #6f7386;
  --margin: #c8453a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #191815;
    --card: #23221e;
    --border: #3c3a33;
    --ink: #9db8f5;
    --ink-soft: #7f9edf;
    --text: #ece7da;
    --muted: #a19c8f;
    --margin: #d9594d;
  }
}
* { box-sizing: border-box; margin: 0; }
body {
  background: var(--paper);
  color: var(--text);
  font: 16px/1.6 -apple-system, "Segoe UI", Roboto, sans-serif;
  padding: 0 20px 80px;
}
main { max-width: 680px; margin: 0 auto; }
header.site { max-width: 680px; margin: 0 auto; padding: 28px 0 8px; display: flex; align-items: baseline; gap: 16px; flex-wrap: wrap; }
header.site a.brand { font-family: Georgia, "Times New Roman", serif; font-size: 26px; font-weight: 700; color: var(--ink); text-decoration: none; letter-spacing: -0.02em; }
header.site nav { display: flex; gap: 14px; }
header.site nav a { color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 600; }
header.site nav a:hover { color: var(--ink); }
.rule { max-width: 680px; margin: 8px auto 28px; height: 3px; border-radius: 2px; border: 1px solid var(--border);
  background: linear-gradient(90deg, var(--ink) 0 33%, var(--card) 33% 66%, var(--margin) 66% 100%); }
h1 { font-family: Georgia, serif; font-size: 34px; color: var(--ink); line-height: 1.2; margin-bottom: 8px; }
h2 { font-family: Georgia, serif; font-size: 22px; color: var(--ink); margin: 28px 0 8px; }
p, li { color: var(--text); }
p.lead { color: var(--muted); font-size: 18px; }
p + p, ul { margin-top: 12px; }
ul { padding-left: 22px; }
a { color: var(--ink-soft); }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 22px; margin-top: 20px; }
.muted { color: var(--muted); font-size: 14px; }
.small { font-size: 13px; color: var(--muted); margin-top: 40px; }
.btn { display: inline-block; background: var(--ink); color: #fff; border-radius: 12px; padding: 12px 22px;
  font-weight: 700; text-decoration: none; margin-top: 14px; }
.btns { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.btns .btn { margin-top: 0; }
code { background: var(--card); border: 1px solid var(--border); border-radius: 5px; padding: 1px 6px; font-size: 14px; }