:root {
  --fg: #172b4d;
  --muted: #6b778c;
  --link: #0052cc;
  --link-hover: #0747a6;
  --bg: #ffffff;
  --border: #dfe1e6;
  --code-bg: #f4f5f7;
  --max-width: 760px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 96px;
}

h1 {
  font-size: 2rem;
  line-height: 1.25;
  margin: 0 0 24px;
  color: var(--fg);
}

h2 {
  font-size: 1.25rem;
  line-height: 1.3;
  margin: 40px 0 12px;
  color: var(--fg);
  border-bottom: 1px solid var(--border);
  padding-bottom: 6px;
}

h3 { font-size: 1.05rem; margin: 24px 0 8px; }

p, ul, ol, table { margin: 0 0 16px; }
ul, ol { padding-left: 24px; }
li { margin-bottom: 6px; }

a {
  color: var(--link);
  text-decoration: none;
}
a:hover, a:focus { color: var(--link-hover); text-decoration: underline; }

code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
th, td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th {
  background: var(--code-bg);
  font-weight: 600;
}

.doc-nav {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 32px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.doc-nav a { color: var(--muted); }
.doc-nav a[aria-current="page"] { color: var(--fg); font-weight: 600; }

footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  main { padding: 24px 16px 64px; }
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.1rem; }
  table { font-size: 0.85rem; }
  th, td { padding: 6px 8px; }
}