:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --link: #0369a1;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 18px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  margin-top: 12px;
}
h1, h2, h3 { margin: 0 0 8px; }
a { color: var(--link); }
.muted { color: var(--muted); }
.small { font-size: 12px; }
ul { margin: 8px 0 0 20px; }
code {
  background: #f1f5f9;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1px 5px;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
th, td {
  border: 1px solid var(--line);
  text-align: left;
  padding: 8px;
}
pre {
  margin: 0;
  white-space: pre-wrap;
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  max-height: 420px;
  overflow: auto;
  font-size: 12px;
  line-height: 1.45;
}
.nav {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}
.nav a {
  display: block;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  text-decoration: none;
  background: #fff;
}