:root {
  --bg: #ffffff;
  --fg: #1d1d1f;
  --muted: #6e6e73;
  --link: #0a66c2;
  --border: #e5e5e7;
  --code-bg: #f6f6f7;
  --table-stripe: #fafafa;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0e10;
    --fg: #e8e8ea;
    --muted: #9a9aa1;
    --link: #7aa2f7;
    --border: #25252a;
    --code-bg: #161618;
    --table-stripe: #131316;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

nav.topbar {
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  font-size: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: baseline;
}

nav.topbar a {
  color: var(--fg);
  text-decoration: none;
}

nav.topbar a.home {
  font-weight: 600;
  margin-right: 8px;
}

nav.topbar a:hover,
nav.topbar a[aria-current="page"] {
  color: var(--link);
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 24px 96px;
}

h1, h2, h3, h4 {
  line-height: 1.25;
  font-weight: 600;
}

h1 { font-size: 26px; margin: 0 0 8px; }
h2 {
  font-size: 19px;
  margin: 40px 0 12px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
h3 { font-size: 16px; margin: 28px 0 8px; }
h4 { font-size: 14px; margin: 20px 0 6px; }

p, ul, ol { margin: 0 0 12px; }
ul, ol { padding-left: 20px; }
li { margin-bottom: 4px; }

a { color: var(--link); }
a:hover { text-decoration: underline; }

code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 12.5px;
  background: var(--code-bg);
  padding: 1px 5px;
  border-radius: 3px;
}

pre {
  background: var(--code-bg);
  padding: 14px 16px;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 12.5px;
  line-height: 1.5;
  margin: 0 0 14px;
}

pre code {
  background: transparent;
  padding: 0;
  font-size: inherit;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 14px;
  font-size: 14px;
}

th, td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th { font-weight: 600; }
tbody tr:nth-child(even) { background: var(--table-stripe); }

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

.muted { color: var(--muted); }
.lede { font-size: 16px; color: var(--muted); margin-bottom: 24px; }

.anchor-list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  column-count: 2;
  column-gap: 24px;
}

.anchor-list li {
  break-inside: avoid;
  margin-bottom: 4px;
}

footer {
  margin-top: 64px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}

nav.pager {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 14px;
}

nav.pager .prev::before { content: "← "; }
nav.pager .next::after { content: " →"; }
nav.pager .parent { color: var(--muted); }
nav.pager a { text-decoration: none; }
nav.pager a:hover { text-decoration: underline; }

nav.on-this-page {
  font-size: 13px;
  color: var(--muted);
  margin: 0 0 24px;
  padding: 8px 0 12px;
  border-bottom: 1px solid var(--border);
}

nav.on-this-page strong {
  color: var(--fg);
  font-weight: 600;
  margin-right: 6px;
}

nav.on-this-page a { margin-right: 12px; }

ul.hub-list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
}

ul.hub-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

ul.hub-list li a {
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
}

ul.hub-list li a:hover { text-decoration: underline; }

ul.hub-list .summary {
  display: block;
  color: var(--muted);
  font-weight: 400;
  margin-top: 2px;
  font-size: 14px;
}

@media (max-width: 560px) {
  .anchor-list { column-count: 1; }
  nav.topbar { gap: 12px; }
  main { padding: 24px 18px 64px; }
}