:root {
  --fg: #1f2328;
  --muted: #57606a;
  --border: #d1d9e0;
  --bg: #ffffff;
  --soft: #f6f8fa;
  --blue: #0969da;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--blue); color: #fff; }

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--blue);
  color: #fff;
  padding: 10px 16px;
  z-index: 10;
}
.skip:focus { left: 12px; top: 12px; }

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 18px;
  padding-bottom: 18px;
}
.brand {
  font-weight: 700;
  font-size: 18px;
  color: var(--fg);
  letter-spacing: -0.01em;
}
.site-nav {
  display: flex;
  gap: 14px;
  font-size: 14px;
  color: var(--muted);
}
.site-nav a { color: var(--muted); }
.site-nav a:hover { color: var(--blue); }

.wrap {
  max-width: 780px;
  margin: 0 auto;
  padding: 32px 24px 72px;
}

.breadcrumbs {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 14px;
}
.breadcrumbs a { color: var(--muted); }
.breadcrumbs span { margin: 0 6px; }

.eyebrow {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 10px;
}

h1 {
  font-size: 2.05em;
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

h2 {
  font-size: 1.5em;
  line-height: 1.3;
  font-weight: 650;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--border);
  margin-top: 44px;
  margin-bottom: 16px;
}

h3 {
  font-size: 1.2em;
  font-weight: 650;
  margin-top: 28px;
  margin-bottom: 10px;
}

p { margin-bottom: 16px; }
ul, ol { margin: 0 0 18px 1.35em; }
li { margin-bottom: 7px; }
li > ul, li > ol { margin-top: 7px; margin-bottom: 0; }

strong { font-weight: 650; }
em { font-style: italic; }

.lead {
  font-size: 1.08em;
  color: var(--muted);
  margin-bottom: 24px;
}

.meta {
  color: var(--muted);
  font-size: 14px;
  margin: 12px 0 24px;
}

.toc {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--soft);
  padding: 16px 20px;
  margin: 20px 0 28px;
  font-size: 14px;
}
.toc strong { display: block; margin-bottom: 8px; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li { margin-bottom: 4px; }
.toc li::before { content: "— "; color: var(--muted); }

.cta {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--soft);
  padding: 16px 20px;
  margin: 20px 0 28px;
}
.cta p { margin-bottom: 8px; }
.cta p:last-child { margin-bottom: 0; }
.cta a { font-weight: 650; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: rgba(175, 184, 193, 0.2);
  padding: 0.15em 0.35em;
  border-radius: 4px;
}

pre {
  background: var(--soft);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 16px;
  overflow-x: auto;
  margin-bottom: 18px;
}
pre code {
  background: none;
  padding: 0;
  font-size: 0.86em;
}

blockquote {
  border-left: 3px solid var(--border);
  color: var(--muted);
  padding-left: 16px;
  margin: 0 0 18px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
  font-size: 0.92em;
}
th, td {
  padding: 8px 12px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
th { background: var(--soft); font-weight: 650; }

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 24px 0;
}
.card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px 20px;
  background: var(--bg);
}
.card h2 {
  border: none;
  padding: 0;
  margin: 0 0 8px;
  font-size: 1.08em;
  line-height: 1.35;
}
.card p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 12px;
}
.card .more { font-size: 14px; font-weight: 650; }

.related {
  border-top: 1px solid var(--border);
  margin-top: 40px;
  padding-top: 20px;
}
.related h2 {
  border: none;
  padding: 0;
  margin: 0 0 12px;
  font-size: 1.15em;
}
.related ul { margin-bottom: 0; }

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 48px;
  padding-top: 20px;
  color: var(--muted);
  font-size: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
}
.site-footer a { color: var(--muted); }

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  .wrap { padding: 22px 16px 56px; }
  h1 { font-size: 1.6em; }
  h2 { font-size: 1.3em; }
  table { display: block; overflow-x: auto; }
  .site-header .wrap { align-items: flex-start; flex-direction: column; gap: 8px; }
}