:root {
  color-scheme: light dark;
  --bg: #f5f5f7;
  --card: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --accent: #2196f3;
  --border: #e5e5ea;
  --max: 720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111114;
    --card: #1c1c1e;
    --text: #f5f5f7;
    --muted: #98989d;
    --border: #38383a;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

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

header.site {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.25rem 0.5rem;
}

header.site h1 {
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
}

header.site p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.25rem 3rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
}

nav.breadcrumb,
nav.lang {
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

nav.lang {
  display: inline-flex;
  gap: 0.25rem;
  padding: 0.25rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
}

nav.lang a {
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  text-decoration: none;
  color: var(--muted);
}

nav.lang a.active {
  font-weight: 600;
  color: var(--text);
  background: var(--bg);
  text-decoration: none;
}

.doc h2 {
  font-size: 1.15rem;
  margin: 1.5rem 0 0.5rem;
}

.doc h2:first-child {
  margin-top: 0;
}

.doc p,
.doc li {
  color: var(--text);
}

.doc ul {
  padding-left: 1.25rem;
}

.doc .updated {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

footer.site {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem 2rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.project-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.project-list li {
  margin: 0.75rem 0;
}

.project-list a {
  font-weight: 600;
  text-decoration: none;
}

.project-list span {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.15rem;
}