/* LLM Wiki Portable — Dark Theme */
:root {
  --surface-0: #0f172a;
  --surface-1: #1e293b;
  --surface-2: #334155;
  --surface-3: #475569;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --border: #334155;
  --cat-sources: #3b82f6;
  --cat-entities: #22c55e;
  --cat-concepts: #f59e0b;
  --cat-comparisons: #a855f7;
  --cat-root: #6b7280;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--surface-0);
  color: var(--text);
  overflow: hidden;
  height: 100vh;
}

#app { display: flex; height: 100vh; }

/* Sidebar */
#sidebar {
  width: 280px;
  min-width: 280px;
  background: var(--surface-1);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: margin-left 0.3s ease;
}
#sidebar.collapsed { margin-left: -280px; }

.sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}
.sidebar-header .logo {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 700; color: white;
}
.sidebar-header h1 { font-size: 16px; font-weight: 600; }

#search {
  margin: 8px 12px;
  padding: 8px 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 13px;
  outline: none;
  width: calc(100% - 24px);
}
#search:focus { border-color: var(--accent); }
#search::placeholder { color: var(--text-dim); }

.sidebar-pages {
  flex: 1;
  overflow-y: auto;
  padding: 4px 0;
}

.category-group { margin-bottom: 4px; }
.category-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  cursor: pointer;
  user-select: none;
  transition: color 0.15s;
}
.category-header:hover { color: var(--text); background: var(--surface-2); }
.category-arrow {
  margin-left: auto;
  font-size: 9px;
  opacity: 0.5;
}
.category-dot {
  width: 8px; height: 8px; border-radius: 50%;
  display: inline-block;
}
.category-count {
  background: var(--surface-2);
  padding: 1px 6px;
  border-radius: 8px;
  font-size: 10px;
  margin-left: auto;
}

.sidebar-link {
  display: block;
  padding: 5px 16px 5px 32px;
  font-size: 13px;
  color: var(--text-dim);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: all 0.15s;
}
.sidebar-link:hover { color: var(--text); background: var(--surface-2); }
.sidebar-link.active { color: var(--accent); background: rgba(59,130,246,0.1); }

.sidebar-footer {
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
}

/* Main content */
#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* Top bar */
#topbar {
  height: 48px;
  background: var(--surface-1);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  flex-shrink: 0;
}
#topbar button {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 4px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  display: flex; align-items: center; gap: 4px;
}
#topbar button:hover { background: var(--surface-3); }
#topbar .title { font-size: 14px; font-weight: 600; flex: 1; }

.legend {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-left: auto;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--text-dim);
}

/* Graph container */
#graph-container {
  flex: 1;
  position: relative;
}
#graph-container canvas { display: block; }

/* Page viewer */
#page-viewer {
  flex: 1;
  overflow-y: auto;
  padding: 32px;
  display: none;
}
#page-viewer.active { display: block; }

.page-header {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.page-header .category-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.page-header h2 { font-size: 24px; font-weight: 700; margin-bottom: 4px; }
.page-header .meta { font-size: 12px; color: var(--text-dim); }

.tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0; }
.tag {
  background: var(--surface-2);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  color: var(--text-dim);
}

/* Prose / markdown content */
.prose-wiki { max-width: 720px; line-height: 1.7; }
.prose-wiki h1 { font-size: 24px; font-weight: 700; margin: 24px 0 12px; border-bottom: 1px solid var(--border); padding-bottom: 8px; }
.prose-wiki h2 { font-size: 20px; font-weight: 600; margin: 20px 0 10px; }
.prose-wiki h3 { font-size: 16px; font-weight: 600; margin: 16px 0 8px; }
.prose-wiki p { margin: 8px 0; }
.prose-wiki ul, .prose-wiki ol { margin: 8px 0; padding-left: 24px; }
.prose-wiki li { margin: 4px 0; }
.prose-wiki code {
  background: var(--surface-2);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.9em;
}
.prose-wiki pre {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 16px;
  overflow-x: auto;
  margin: 12px 0;
}
.prose-wiki pre code { background: none; padding: 0; }
.prose-wiki blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 12px;
  margin: 8px 0;
  color: var(--text-dim);
}
.prose-wiki table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
}
.prose-wiki th, .prose-wiki td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}
.prose-wiki th { background: var(--surface-2); font-weight: 600; }
.prose-wiki img { max-width: 100%; border-radius: 6px; }
.prose-wiki hr { border: none; border-top: 1px solid var(--border); margin: 16px 0; }

.wiki-link {
  color: var(--accent);
  cursor: pointer;
  text-decoration: none;
  border-bottom: 1px dashed var(--accent);
  transition: color 0.15s;
}
.wiki-link:hover { color: var(--accent-hover); }

/* Backlinks / Related */
.links-section {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.links-section h3 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.links-section a {
  display: inline-block;
  margin: 2px 4px 2px 0;
  padding: 2px 8px;
  background: var(--surface-2);
  border-radius: 4px;
  font-size: 12px;
  color: var(--text-dim);
  cursor: pointer;
  text-decoration: none;
}
.links-section a:hover { color: var(--text); background: var(--surface-3); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--surface-3); }

/* Responsive */
@media (max-width: 768px) {
  #sidebar { position: absolute; z-index: 10; height: 100%; }
  #sidebar.collapsed { margin-left: -280px; }
}

/* Loading */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-dim);
  font-size: 14px;
}

/* Tooltip */
.graph-tooltip {
  position: absolute;
  background: var(--surface-1);
  border: 1px solid var(--border);
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--text);
  pointer-events: none;
  z-index: 100;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0,0,0,0.4);
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Keyboard shortcut hint */
.search-hint {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 10px;
  color: var(--text-dim);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1px 5px;
  pointer-events: none;
}