:root {
  --bg: #ffffff;
  --text: #1c1e21;
  --muted: #5f6368;
  --line: #dadce0;
  --link: #1a5fb4;
  --code: #f1f3f4;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111316;
    --text: #e3e3e3;
    --muted: #9aa0a6;
    --line: #3c4043;
    --link: #8ab4f8;
    --code: #202327;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans TC",
    "Microsoft JhengHei", sans-serif;
  line-height: 1.75;
}

main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}

h1 { font-size: 1.75rem; margin: 0.5rem 0 1rem; }
h2 { font-size: 1.25rem; margin: 2.25rem 0 0.5rem; }
h3 { font-size: 1.05rem; margin: 1.5rem 0 0.25rem; }

a { color: var(--link); }

.crumb, .meta { color: var(--muted); font-size: 0.9rem; }

code {
  background: var(--code);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.9em;
}

table {
  border-collapse: collapse;
  width: 100%;
  display: block;
  overflow-x: auto;
}

th, td {
  border: 1px solid var(--line);
  padding: 0.5rem 0.75rem;
  text-align: left;
  vertical-align: top;
}