:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #14151a;
  --muted: #5b5f6b;
  --accent: #5b5bf5;
  --border: #e6e6ee;
  --card: #f7f7fb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0f13;
    --fg: #f2f2f5;
    --muted: #a3a6b3;
    --accent: #8c8cff;
    --border: #23242c;
    --card: #17181f;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}
header.site {
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
}
header.site a.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--fg);
  text-decoration: none;
}
main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}
h1 {
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  margin: 0 0 0.25rem;
  letter-spacing: -0.02em;
}
.updated {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0 0 2rem;
}
h2 {
  font-size: 1.3rem;
  margin: 2.2rem 0 0.8rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}
main > h2:first-of-type {
  border-top: none;
  padding-top: 0;
}
h3 {
  font-size: 1.05rem;
  margin: 1.4rem 0 0.5rem;
}
p, li {
  color: var(--fg);
}
ul, ol {
  padding-left: 1.4rem;
}
li {
  margin: 0.35rem 0;
}
a {
  color: var(--accent);
}
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.95rem;
}
th, td {
  border: 1px solid var(--border);
  padding: 0.6rem 0.8rem;
  text-align: left;
}
th {
  background: var(--card);
}
.note {
  margin-top: 2.5rem;
  padding: 1rem 1.2rem;
  background: var(--card);
  border-radius: 0.5rem;
  font-size: 0.9rem;
  color: var(--muted);
}
footer.site {
  border-top: 1px solid var(--border);
  padding: 1.5rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--muted);
}
footer.site a {
  color: var(--muted);
  text-decoration: none;
  margin: 0 0.6rem;
}
footer.site a:hover {
  color: var(--accent);
  text-decoration: underline;
}