:root {
  --bg: #fafaf9; --fg: #1c1917; --muted: #57534e; --line: #e7e5e4;
  --card: #ffffff; --accent: #0f766e;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0c0a09; --fg: #f5f5f4; --muted: #a8a29e; --line: #292524;
    --card: #1c1917; --accent: #5eead4;
  }
}
:root[data-theme="dark"] {
  --bg: #0c0a09; --fg: #f5f5f4; --muted: #a8a29e; --line: #292524;
  --card: #1c1917; --accent: #5eead4;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px; }
.top { display: flex; justify-content: space-between; align-items: center; padding-top: 24px; padding-bottom: 24px; flex-wrap: wrap; gap: 12px; }
.brand { color: var(--fg); font-weight: 600; }
nav { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
nav a { color: var(--muted); font-size: 15px; }
button {
  font: inherit; font-size: 14px; color: var(--muted); background: none;
  border: 1px solid var(--line); border-radius: 6px; padding: 2px 10px; cursor: pointer;
}
.intro { padding: 48px 0 24px; }
h1 { font-size: 2.6rem; line-height: 1.15; margin: 0 0 12px; }
.lead { font-size: 1.25rem; color: var(--muted); margin: 0; }
section { padding: 24px 0; }
h2 { font-size: 1.1rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 0 0 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px 20px; margin-bottom: 12px; }
.card h3 { margin: 0 0 6px; font-size: 1.15rem; }
.card p { margin: 0 0 8px; }
pre { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; overflow-x: auto; font-size: 14px; line-height: 1.5; }
.links { display: flex; gap: 16px; flex-wrap: wrap; }
.foot { padding-top: 32px; padding-bottom: 48px; color: var(--muted); font-size: 14px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; margin: 8px 0 16px; display: block; overflow-x: auto; }
th, td { padding: 6px 10px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }