:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1d1d1f;
  --muted: #6e6e73;
  --line: rgba(0, 0, 0, 0.12);
  --code-bg: rgba(0, 0, 0, 0.05);
  --accent: #0066cc;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --fg: #f5f5f7;
    --muted: #a1a1a6;
    --line: rgba(255, 255, 255, 0.16);
    --code-bg: rgba(255, 255, 255, 0.08);
    --accent: #2997ff;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue",
        "PingFang SC", "Hiragino Sans GB", sans-serif;
}
.nav {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
}
.brand { font-weight: 600; letter-spacing: -0.01em; }
.nav nav { display: flex; gap: 20px; }
.nav nav a { color: var(--muted); }
.nav nav a:hover { color: var(--fg); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}
h1 {
  font-size: 2.25rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.6em;
}
h2 {
  font-size: 1.4rem;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 2.2em 0 0.6em;
  padding-top: 1.2em;
  border-top: 1px solid var(--line);
}
h3 { font-size: 1.1rem; margin: 1.6em 0 0.4em; }
p, ul, ol, table { margin: 0 0 1.1em; }
ul, ol { padding-left: 1.4em; }
li { margin: 0.25em 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: 3em 0; }
/* the language divider is followed by an h2 which already draws a rule */
hr + h2 { border-top: 0; padding-top: 0; margin-top: 0.2em; }
code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.875em;
  background: var(--code-bg);
  padding: 0.15em 0.35em;
  border-radius: 5px;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  display: block;
  overflow-x: auto;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { font-weight: 600; color: var(--muted); white-space: nowrap; }
blockquote {
  margin: 1.5em 0;
  padding: 0 1.2em;
  border-left: 3px solid var(--line);
  color: var(--muted);
}
.cards {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 14px;
  margin-top: 2em;
}
.cards a {
  display: block;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  color: var(--fg);
}
.cards a:hover {
  text-decoration: none;
  border-color: var(--accent);
}
.cards strong { display: block; margin-bottom: 4px; }
.cards span { color: var(--muted); font-size: 0.9rem; }
footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 24px 64px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}
footer p { margin: 0.2em 0; }