:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --surface: #f5f5f7;
  --text: #111114;
  --muted: #6b6b76;
  --primary: #2f6bff;
  --border: #e4e4ea;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0e11;
    --surface: #17171c;
    --text: #f2f2f5;
    --muted: #9a9aa6;
    --primary: #6d95ff;
    --border: #2a2a33;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font:
    17px/1.6 -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    sans-serif;
}
.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}
header.site {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 40px;
}
header.site a {
  color: inherit;
  text-decoration: none;
  font-weight: 600;
  font-size: 19px;
}
nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 16px;
  font-size: 15px;
}
nav a:hover {
  color: var(--text);
}
h1 {
  font-size: 34px;
  line-height: 1.2;
  margin: 0 0 16px;
}
h2 {
  font-size: 20px;
  margin: 36px 0 10px;
}
p,
li {
  color: var(--text);
}
.lead {
  font-size: 19px;
  color: var(--muted);
}
.muted {
  color: var(--muted);
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
  margin: 24px 0;
}
.code {
  font:
    600 32px/1.2 ui-monospace,
    SFMono-Regular,
    Menlo,
    monospace;
  letter-spacing: 0.12em;
  text-align: center;
  padding: 12px 0;
}
footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}
footer a {
  color: var(--muted);
}