:root {
  --bg: #ffffff;
  --fg: #1b1f24;
  --muted: #5b6572;
  --line: #e3e7ec;
  --accent: #1f6feb;
  --card: #f7f9fb;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1419;
    --fg: #e6edf3;
    --muted: #93a1b1;
    --line: #232b34;
    --accent: #58a6ff;
    --card: #161c23;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.wrap {
  max-width: 940px;
  margin: 0 auto;
  padding: 0 20px;
}

.top {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}

.top .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 60px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg);
  text-decoration: none;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 18px;
  font-size: 15px;
}

nav a:hover { color: var(--accent); }

a { color: var(--accent); }

.hero {
  padding: 48px 0 24px;
  border-bottom: 1px solid var(--line);
}

h1 {
  margin: 0 0 12px;
  font-size: 30px;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.lead {
  margin: 0;
  color: var(--muted);
  max-width: 62ch;
  font-size: 17px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  padding: 28px 0;
}

.card {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.card h2, .note h2 {
  margin: 0 0 8px;
  font-size: 16px;
  letter-spacing: -0.01em;
}

.card p, .note p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.note {
  border-top: 1px solid var(--line);
  padding: 24px 0 48px;
  max-width: 68ch;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 8px 0 28px;
  font-size: 15px;
}

th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}

th {
  color: var(--muted);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.ok { color: #1a7f37; font-weight: 600; }
@media (prefers-color-scheme: dark) { .ok { color: #3fb950; } }

code {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 6px;
  font: 13px/1.5 ui-monospace, "Cascadia Mono", Consolas, monospace;
}

pre {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  overflow-x: auto;
}

pre code { background: none; border: 0; padding: 0; }

.bottom {
  border-top: 1px solid var(--line);
  padding: 18px 0 40px;
  color: var(--muted);
  font-size: 14px;
}

.sep { opacity: 0.5; margin: 0 6px; }