:root {
  --ink: #2b2a28;
  --muted: #6b6761;
  --paper: #faf8f4;
  --line: #e4dfd6;
  --seal: #a8322e;
  --max: 720px;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #ece8e1; --muted: #a39d94; --paper: #1d1c1a; --line: #3a3733; --seal: #d9534f; }
}
* { box-sizing: border-box; }
html { color-scheme: light dark; }
body {
  margin: 0;
  padding: 0 20px 64px;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.7 -apple-system, "SF Pro Text", "PingFang TC", "Noto Sans TC", "Helvetica Neue", Arial, sans-serif;
}
header, main, footer { max-width: var(--max); margin: 0 auto; }
header { padding: 28px 0 12px; border-bottom: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 8px 20px; align-items: baseline; }
header .brand { font-weight: 700; font-size: 20px; color: var(--ink); text-decoration: none; }
header nav a { color: var(--muted); text-decoration: none; margin-right: 16px; font-size: 15px; }
header nav a:hover, header nav a[aria-current] { color: var(--seal); }
main { padding-top: 28px; }
h1 { font-size: 28px; line-height: 1.3; margin: 0 0 6px; }
h2 { font-size: 20px; margin: 36px 0 8px; }
h3 { font-size: 16px; margin: 20px 0 4px; }
p, li { color: var(--ink); }
.muted { color: var(--muted); font-size: 14px; }
a { color: var(--seal); }
table { border-collapse: collapse; width: 100%; margin: 8px 0 12px; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; }
.lang { margin: 40px 0 0; padding-top: 24px; border-top: 2px solid var(--line); }
.lang:first-of-type { margin-top: 0; padding-top: 0; border-top: 0; }
.todo { background: rgba(168, 50, 46, .08); border-left: 3px solid var(--seal); padding: 2px 8px; }
footer { margin-top: 56px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 13px; color: var(--muted); }
footer p { margin: 6px 0; color: var(--muted); }
@media (max-width: 480px) { body { font-size: 15px; } h1 { font-size: 24px; } }