* { box-sizing: border-box; }

:root {
  color-scheme: light;
  --bg: #f8fafc;
  --surface: #fff;
  --ink: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --border-input: #cbd5e1;
  --control-bg: #fff;
  --control-hover: #f1f5f9;
  --tag-bg: #f1f5f9;
  --tag-ink: #475569;
  --link: #2563eb;
  --code-bg: #f1f5f9;
  --pre-bg: #0f172a;
  --pre-fg: #e2e8f0;
}

html.dark {
  color-scheme: dark;
  --bg: #0f172a;
  --surface: #1e293b;
  --ink: #f1f5f9;
  --muted: #94a3b8;
  --border: #334155;
  --border-input: #475569;
  --control-bg: #1e293b;
  --control-hover: #334155;
  --tag-bg: #334155;
  --tag-ink: #cbd5e1;
  --link: #60a5fa;
  --code-bg: #334155;
  --pre-bg: #020617;
  --pre-fg: #e2e8f0;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 14px;
  color: var(--ink);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  height: 100vh;
}
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.title strong { font-size: 16px; }
.title-link {
  color: inherit;
  text-decoration: none;
}
.title-link:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}
.title-link.muted { color: var(--muted); font-size: 12px; }
.title-link + .title-link { margin-left: 8px; }
.muted { color: var(--muted); font-size: 12px; }
.controls { display: flex; gap: 8px; flex-wrap: wrap; }
.controls input::placeholder {
  color: var(--muted);
  opacity: 1;
}

.detail-header h1,
#detail-id {
  color: var(--ink);
}

#detail-body strong,
#detail-body b {
  color: var(--ink);
  font-weight: 600;
}

#detail-body blockquote {
  margin: 8px 0;
  padding: 6px 12px;
  border-left: 3px solid var(--border-input);
  color: var(--muted);
}

#detail-body th {
  background: var(--tag-bg);
  color: var(--ink);
}

.controls input, .controls select, .controls button {
  font-size: 13px;
  padding: 5px 8px;
  border: 1px solid var(--border-input);
  border-radius: 4px;
  background: var(--control-bg);
  color: var(--ink);
}
.controls input { width: 220px; }
.controls button { cursor: pointer; background: var(--control-hover); }
.controls button:hover { filter: brightness(0.95); }

main {
  display: flex;
  flex: 1;
  min-height: 0;
}
#graph {
  flex: 1 1 60%;
  background: var(--surface);
  border-right: 1px solid var(--border);
  min-width: 0;
  position: relative;
}
#detail {
  flex: 0 0 40%;
  overflow-y: auto;
  padding: 18px 22px;
  background: var(--surface);
}
#detail-empty {
  text-align: center;
  margin-top: 40px;
}

.detail-header { margin-bottom: 12px; }
.detail-header h1 {
  font-size: 18px;
  margin: 4px 0 2px;
  font-weight: 600;
}
.type-chip {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  background: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
dl.frontmatter {
  display: grid;
  grid-template-columns: 90px 1fr;
  row-gap: 4px;
  column-gap: 12px;
  margin: 8px 0 12px;
  font-size: 13px;
}
dl.frontmatter dt {
  color: var(--muted);
  font-weight: 500;
}
dl.frontmatter dd { margin: 0; }
dl.frontmatter a { color: var(--link); word-break: break-all; }

.tag {
  display: inline-block;
  padding: 1px 6px;
  margin: 0 4px 2px 0;
  border-radius: 4px;
  background: var(--tag-bg);
  color: var(--tag-ink);
  font-size: 11px;
}

hr { border: none; border-top: 1px solid var(--border); margin: 14px 0; }

#detail-body { font-size: 13px; line-height: 1.55; color: var(--ink); }
#detail-body h1 {
  font-size: 16px; margin: 18px 0 6px;
  padding-bottom: 4px; border-bottom: 1px solid var(--border);
}
#detail-body h2 { font-size: 14px; margin: 14px 0 4px; }
#detail-body h3 { font-size: 13px; margin: 12px 0 4px; }
#detail-body p { margin: 6px 0; }
#detail-body code {
  background: var(--code-bg);
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 12px;
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
}
#detail-body pre {
  background: var(--pre-bg);
  color: var(--pre-fg);
  padding: 10px 12px;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 12px;
}
#detail-body pre code { background: transparent; color: inherit; padding: 0; }
#detail-body ul, #detail-body ol { padding-left: 22px; margin: 6px 0; }
#detail-body li { margin: 2px 0; }
#detail-body table { border-collapse: collapse; margin: 8px 0; }
#detail-body th, #detail-body td {
  border: 1px solid var(--border); padding: 4px 8px; font-size: 12px;
}
#detail-body a.internal { color: var(--link); cursor: pointer; }
#detail-body a.external { color: var(--link); }

#detail-backlinks { margin-top: 18px; }
#detail-backlinks h2 { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
#detail-backlinks ul { padding-left: 18px; }
#detail-backlinks a { color: var(--link); cursor: pointer; }