:root {
  --ink: #1a2230;
  --muted: #5a6678;
  --accent: #2a4d8f;
  --accent-soft: #eaf0fb;
  --line: #e2e6ee;
  --bg: #fbfcfe;
  --code-bg: #f3f5f9;
  --max: 60rem;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code, .mono {
  font-family: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1.5rem; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.1rem;
  padding-bottom: 1.1rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.brand { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1.15rem; color: var(--ink); letter-spacing: -0.01em; }
.brand a { display: inline-flex; align-items: center; gap: 0.5rem; }
.brand span { color: var(--accent); }
.brand-mark { width: 30px; height: 30px; display: block; flex: 0 0 auto; }
.nav a { margin-left: 1.25rem; color: var(--muted); font-size: 0.95rem; }
.nav a:first-child { margin-left: 0; }

/* Hero */
.hero { padding: 4rem 0 2.5rem; }
.hero h1 { font-size: 2.3rem; line-height: 1.15; margin: 0 0 1rem; letter-spacing: -0.02em; }
.hero p.lead { font-size: 1.2rem; color: var(--muted); max-width: 42rem; margin: 0; }
.hero-logo { display: block; margin: 0 0 1.75rem; width: 280px; max-width: 70%; height: auto; }

/* Sections */
section { padding: 1.5rem 0; }
h2 { font-size: 1.4rem; margin: 2rem 0 1rem; letter-spacing: -0.01em; }
h2:first-child { margin-top: 0; }

/* Ontology cards */
.cards { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fill, minmax(20rem, 1fr)); }
.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  padding: 1.4rem 1.5rem;
  display: flex;
  flex-direction: column;
}
.card h3 { margin: 0 0 0.4rem; font-size: 1.15rem; }
.card h3 a { color: var(--ink); }
.card .ns { color: var(--muted); font-size: 0.82rem; margin: 0 0 0.7rem; word-break: break-all; }
.card p { margin: 0 0 1rem; color: var(--muted); font-size: 0.97rem; }
.card .meta { margin-top: auto; display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}
.badge.muted { background: var(--code-bg); color: var(--muted); }

/* Placeholder card (room for the next ontology) */
.card.placeholder {
  border-style: dashed;
  background: transparent;
  align-items: flex-start;
  justify-content: center;
  color: var(--muted);
}
.card.placeholder h3 { color: var(--muted); }

/* Code blocks */
pre {
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-size: 0.88rem;
  line-height: 1.5;
}
p code, li code { background: var(--code-bg); padding: 0.1rem 0.35rem; border-radius: 4px; }

/* Definition tables */
table { border-collapse: collapse; width: 100%; margin: 1rem 0; font-size: 0.95rem; }
th, td { text-align: left; padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 3rem;
  padding: 2rem 0;
  color: var(--muted);
  font-size: 0.9rem;
  background: #fff;
}
.site-footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem; }

.back { display: inline-block; margin-bottom: 1rem; font-size: 0.9rem; color: var(--muted); }