/* CC Knowledge Graph — Dark Theme */
:root {
  --bg: #0d0d0d;
  --bg-card: #1a1a1a;
  --bg-hover: #242424;
  --text: #e0e0e0;
  --text-dim: #888;
  --accent: #ff0000;
  --accent-dim: #cc0000;
  --link: #ff4444;
  --link-hover: #ff6666;
  --border: #333;
  --tag-bg: #2a1a1a;
  --quote-bg: #1a1a1a;
  --quote-border: #ff0000;
  --gene-bg: #1a2a1a;
  --strategy-bg: #1a1a2a;
  --recovery-bg: #2a1a2a;
  --optimize-bg: #2a2a1a;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

a { color: var(--link); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--link-hover); text-decoration: underline; }

h1 {
  font-size: 2rem;
  color: #fff;
  margin-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 0.5rem;
}

h2 {
  font-size: 1.3rem;
  color: #fff;
  margin-top: 2rem;
  margin-bottom: 0.8rem;
  padding-left: 0.5rem;
  border-left: 3px solid var(--accent);
}

h3 { font-size: 1.1rem; color: #ddd; margin-top: 1.5rem; margin-bottom: 0.5rem; }

p { margin-bottom: 1rem; }

.meta {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}

.meta span { margin-right: 1.5rem; }

blockquote {
  background: var(--quote-bg);
  border-left: 4px solid var(--quote-border);
  padding: 1rem 1.2rem;
  margin: 1rem 0;
  font-style: italic;
  color: #ccc;
}

blockquote cite {
  display: block;
  margin-top: 0.5rem;
  font-style: normal;
  font-size: 0.85rem;
  color: var(--text-dim);
}

ul, ol {
  margin: 0.5rem 0 1rem 1.5rem;
}

li { margin-bottom: 0.4rem; }

.nav-top {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  align-items: center;
}

.nav-top a {
  color: var(--text-dim);
  font-size: 0.9rem;
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: all 0.2s;
}

.nav-top a:hover {
  color: var(--accent);
  border-color: var(--accent);
  text-decoration: none;
}

.nav-top a.active {
  color: var(--accent);
  border-color: var(--accent);
}

/* Index page cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin: 1rem 0 2rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  transition: all 0.2s;
}

.card:hover {
  border-color: var(--accent);
  background: var(--bg-hover);
}

.card h3 {
  margin: 0 0 0.3rem;
  font-size: 1rem;
}

.card h3 a { color: #fff; }
.card h3 a:hover { color: var(--link-hover); }

.card .card-desc {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.card .card-meta {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 0.5rem;
}

/* Tags */
.tag {
  display: inline-block;
  background: var(--tag-bg);
  color: var(--accent);
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  font-size: 0.8rem;
  margin-right: 0.3rem;
  margin-bottom: 0.3rem;
}

/* Stats bar */
.stats-bar {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  padding: 1rem 0;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.stat {
  text-align: center;
}

.stat-num {
  display: block;
  font-size: 2rem;
  font-weight: bold;
  color: var(--accent);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
}

/* Rules special styling */
.rule-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  margin-bottom: 1rem;
}

.rule-card.gene { border-left: 4px solid #00cc44; background: var(--gene-bg); }
.rule-card.strategy { border-left: 4px solid #4488ff; background: var(--strategy-bg); }
.rule-card.recovery { border-left: 4px solid #cc44ff; background: var(--recovery-bg); }
.rule-card.optimize { border-left: 4px solid #cccc00; background: var(--optimize-bg); }

.rule-card h3 { margin-top: 0; }

.rule-card .rule-meta {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}

/* Section header */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-top: 2rem;
}

.section-header h2 { margin-top: 0; }

.section-header a {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Table */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

th, td {
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border);
  text-align: left;
}

th {
  background: var(--bg-card);
  color: #fff;
  font-weight: 600;
}

td { color: var(--text); }

tr:hover td { background: var(--bg-hover); }

/* Footer */
.footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.8rem;
  text-align: center;
}

/* Responsive */
@media (max-width: 600px) {
  body { padding: 1rem; }
  h1 { font-size: 1.5rem; }
  .card-grid { grid-template-columns: 1fr; }
  .stats-bar { gap: 1rem; }
  .stat-num { font-size: 1.5rem; }
}

/* Hero */
.hero {
  text-align: center;
  padding: 2rem 0;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: 2.5rem;
  border: none;
  padding: 0;
}

.hero .subtitle {
  color: var(--text-dim);
  font-size: 1.1rem;
  margin-top: 0.5rem;
}

.hero .accent { color: var(--accent); }