:root {
  --sidebar-width: 260px;
  --fg: #1d2127;
  --muted: #6b7280;
  --border: #e5e7eb;
  --bg: #ffffff;
  --sidebar-bg: #f7f8fa;
  --accent: #2f6f4f;
  --link: #1f6feb;
  --code-bg: #f3f4f6;
}

* { box-sizing: border-box; }

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

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  padding: 1rem;
  overflow-y: auto;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar-header {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

.sidebar-header a {
  color: var(--fg);
  text-decoration: none;
}

#nav-filter {
  width: 100%;
  padding: 0.4rem 0.6rem;
  margin-bottom: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.85rem;
}

.nav-toplevel {
  list-style: none;
  margin: 0 0 0.75rem;
  padding: 0;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}

.nav-section {
  margin-bottom: 0.75rem;
}

.nav-section h3 {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0.5rem 0 0.25rem;
}

.nav-section ul,
.nav-toplevel {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-section li,
.nav-toplevel li {
  margin: 0.15rem 0;
}

.nav-section a,
.nav-toplevel a {
  color: var(--fg);
  text-decoration: none;
  font-size: 0.88rem;
  display: block;
  padding: 0.1rem 0.3rem;
  border-radius: 4px;
}

.nav-section a:hover,
.nav-toplevel a:hover {
  background: #ebedf0;
}

.nav-section a.active,
.nav-toplevel a.active {
  background: var(--accent);
  color: #fff;
}

.nav-section .empty {
  color: var(--muted);
  font-size: 0.8rem;
  font-style: italic;
  margin: 0;
}

.content {
  flex: 1;
  padding: 2rem 3rem;
  max-width: 860px;
}

.breadcrumbs {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.breadcrumbs a {
  color: var(--muted);
}

.breadcrumbs .sep {
  margin: 0 0.35rem;
}

.breadcrumbs [aria-current="page"] {
  color: var(--fg);
}

.page-header h1 {
  margin-bottom: 0.4rem;
}

.subtitle {
  color: var(--muted);
}

.page-meta {
  margin-bottom: 0.4rem;
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  margin-right: 0.5rem;
  text-transform: capitalize;
}

.meta-item {
  color: var(--muted);
  font-size: 0.85rem;
  margin-right: 0.75rem;
}

.tags {
  margin: 0.4rem 0;
}

.tag {
  display: inline-block;
  font-size: 0.75rem;
  background: var(--code-bg);
  color: var(--muted);
  border-radius: 4px;
  padding: 0.1rem 0.45rem;
  margin: 0 0.3rem 0.3rem 0;
}

.related {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 1rem;
}

.related a {
  color: var(--link);
}

.markdown-body {
  margin-top: 1.5rem;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3 {
  margin-top: 1.6rem;
  margin-bottom: 0.5rem;
}

.markdown-body a {
  color: var(--link);
  text-decoration: none;
}

.markdown-body a:hover {
  text-decoration: underline;
}

.markdown-body code {
  background: var(--code-bg);
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  font-size: 0.9em;
}

.markdown-body pre {
  background: var(--code-bg);
  padding: 0.75rem 1rem;
  border-radius: 6px;
  overflow-x: auto;
}

.markdown-body pre code {
  background: none;
  padding: 0;
}

.markdown-body blockquote {
  border-left: 4px solid var(--border);
  margin: 1rem 0;
  padding: 0.25rem 1rem;
  color: var(--muted);
}

.markdown-body blockquote.contradiction {
  border-left-color: #d9534f;
  background: #fdf2f2;
  color: #7a1f1a;
}

.missing-link {
  color: #b45309;
  border-bottom: 1px dashed #b45309;
  cursor: help;
}

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

th, td {
  border: 1px solid var(--border);
  padding: 0.4rem 0.6rem;
  text-align: left;
}

th {
  background: var(--code-bg);
}

.site-footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer a {
  color: var(--muted);
}

.footer-links {
  margin-bottom: 0.25rem;
}