:root {
  color-scheme: light dark;
  --bg: #0b1220;
  --card: #121b2e;
  --card-alt: #0f1a2e;
  --accent: #4f8cff;
  --accent-2: #35d6a8;
  --text: #e6ecf5;
  --muted: #93a2bd;
  --border: #22314f;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}
.wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}
header.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
}
header.site .brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
}
header.site nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 1.5rem;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.15s;
}
header.site nav a:hover,
header.site nav a[aria-current="page"] {
  color: var(--accent);
}
.badge {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 1rem;
}
.badge.green { background: var(--accent-2); color: #06281f; }
h1 { font-size: 1.9rem; margin: 0 0 0.5rem; }
h2 { font-size: 1.3rem; margin: 2.5rem 0 1rem; color: var(--text); }
h2 .num {
  display: inline-block;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  margin-right: 0.4rem;
}
p.lede { color: var(--muted); font-size: 1.05rem; max-width: 640px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.5rem 1.75rem;
  margin-bottom: 1.25rem;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}
.grid .card { margin-bottom: 0; }
.grid .card h3 { margin: 0 0 0.4rem; font-size: 1rem; color: var(--accent); }
.grid .card p { margin: 0; color: var(--muted); font-size: 0.92rem; }
ul.plain { color: var(--muted); line-height: 1.8; padding-left: 1.2rem; margin: 0.5rem 0; }
code {
  background: rgba(255,255,255,0.08);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: 0.92rem;
}
th, td {
  text-align: left;
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--border);
}
th { color: var(--muted); font-weight: 600; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.03em; }
td { color: var(--text); }
td.muted { color: var(--muted); }
.diagram-box {
  background: var(--card-alt);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem;
  margin: 1.5rem 0;
  overflow-x: auto;
}
.diagram-box svg { display: block; width: 100%; height: auto; min-width: 640px; }
footer.site {
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}
footer.site a { color: var(--accent); }