:root {
  --n-bg: #ffffff;
  --n-surface: #f6f8fa;
  --n-border: #e6e9ee;
  --n-text: #0b1f3a;
  --n-muted: #6b7280;
  --brand: #2563eb;
  --brand-700: #1d4ed8;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  color: var(--n-text);
  background: var(--n-bg);
  line-height: 1.6;
}
a { color: var(--brand); }
a:hover { color: var(--brand-700); }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 1.25rem 3rem; }
header.site {
  border-bottom: 1px solid var(--n-border);
  background: var(--n-bg);
}
header.site .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.9rem 1.25rem;
}
.brand { font-weight: 700; color: var(--n-text); text-decoration: none; }
nav a { margin-left: 1rem; text-decoration: none; color: var(--n-muted); }
nav a:hover { color: var(--n-text); }
h1 { font-size: 2rem; line-height: 1.25; margin: 1.5rem 0 0.75rem; }
h2 { font-size: 1.4rem; margin: 2rem 0 0.75rem; }
p.lead { font-size: 1.125rem; }
.muted { color: var(--n-muted); }
.card {
  background: var(--n-surface);
  border: 1px solid var(--n-border);
  border-radius: 12px;
  padding: 1.25rem;
  margin: 1rem 0;
}
.cta {
  display: inline-block;
  background: var(--brand);
  color: #fff !important;
  text-decoration: none;
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  font-weight: 600;
  margin: 0.5rem 0.5rem 0.5rem 0;
}
.cta.secondary {
  background: transparent;
  color: var(--brand) !important;
  border: 1px solid var(--n-border);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
th, td {
  border: 1px solid var(--n-border);
  padding: 0.6rem 0.7rem;
  text-align: left;
}
th { background: var(--n-surface); }
.crumbs { font-size: 0.9rem; color: var(--n-muted); margin-top: 1.25rem; }
.crumbs a { color: var(--n-muted); text-decoration: none; }
footer.site {
  border-top: 1px solid var(--n-border);
  color: var(--n-muted);
  font-size: 0.9rem;
  padding: 1.5rem 0;
}
ul.related { padding-left: 1.2rem; }
updated { display: block; font-size: 0.85rem; color: var(--n-muted); margin-top: 2rem; }