:root {
  --bg: #fbf7f0;
  --surface: #ffffff;
  --text: #2b2622;
  --muted: #6b625a;
  --accent: #b5532f;
  --border: #e6ddd1;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1916;
    --surface: #26221e;
    --text: #efe9e1;
    --muted: #b3a99e;
    --accent: #e8875f;
    --border: #3a342e;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.75 -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
}
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
header.site { border-bottom: 1px solid var(--border); background: var(--surface); }
header.site nav { max-width: 760px; margin: 0 auto; padding: 12px 16px; display: flex; flex-wrap: wrap; gap: 8px 20px; align-items: center; }
header.site .brand { font-weight: 700; color: var(--text); margin-right: auto; }
a { color: var(--accent); }
header.site a { text-decoration: none; }
h1 { font-size: 1.75rem; line-height: 1.3; margin: 0 0 8px; }
h2 { font-size: 1.25rem; margin: 36px 0 8px; }
h3 { font-size: 1.05rem; margin: 20px 0 4px; }
.lead { color: var(--muted); margin-top: 0; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px 20px; margin: 16px 0; }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; min-width: 520px; font-size: 0.95rem; }
th, td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--surface); }
footer { color: var(--muted); font-size: 0.875rem; border-top: 1px solid var(--border); margin-top: 48px; padding-top: 16px; }