:root {
  --bg: #0b0d12;
  --bg-alt: #12151c;
  --fg: #e7e9ee;
  --muted: #9aa3b2;
  --accent: #7c9cff;
  --border: #232833;
  --radius: 10px;
}

* { box-sizing: border-box; }

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

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--fg);
  text-decoration: none;
}

.site-header nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 1.25rem;
  font-size: 0.95rem;
}

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

main.wrap {
  padding-top: 2.5rem;
  padding-bottom: 3rem;
}

h1, h2, h3 {
  line-height: 1.25;
}

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

code, pre {
  font-family: "SF Mono", Menlo, Consolas, monospace;
}

pre {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
}

code {
  background: var(--bg-alt);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

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

.hero {
  padding: 2rem 0 1rem;
}

.hero .tagline {
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 640px;
}

.cta {
  display: inline-flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.btn {
  display: inline-block;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--accent);
  color: #0b0d12;
}

.btn-secondary {
  border: 1px solid var(--border);
  color: var(--fg);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.card h3 {
  margin-top: 0;
  font-size: 1.05rem;
}

.card p {
  color: var(--muted);
  font-size: 0.92rem;
  margin-bottom: 0;
}

.doc-list {
  list-style: none;
  padding: 0;
}

.doc-list li {
  border-bottom: 1px solid var(--border);
  padding: 0.85rem 0;
}

.doc-list a {
  text-decoration: none;
  font-weight: 600;
}

.doc-list p {
  color: var(--muted);
  margin: 0.25rem 0 0;
  font-size: 0.9rem;
}

.mermaid {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  display: flex;
  justify-content: center;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 0;
  color: var(--muted);
  font-size: 0.85rem;
}