/* ============================================================
   CRONICAS BARBARAS — Knowledge Graph Visualization
   Dark theme with glassmorphism, Inter font, indigo accent
   ============================================================ */

/* --- Reset & Variables --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Background layers */
  --bg-base: #0a0a0f;
  --bg-card: #12121a;
  --bg-card-hover: #1a1a28;
  --bg-elevated: #16162a;
  --bg-input: #0e0e1a;

  /* Glass */
  --glass-bg: rgba(18, 18, 26, 0.72);
  --glass-border: rgba(99, 102, 241, 0.12);
  --glass-border-hover: rgba(99, 102, 241, 0.28);
  --glass-blur: 20px;

  /* Accent */
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-dim: rgba(99, 102, 241, 0.15);
  --accent-glow: rgba(99, 102, 241, 0.35);

  /* Node colors */
  --node-episode: #4A90D9;
  --node-person: #2ECC71;
  --node-theme: #E67E22;
  --node-concept: #9B59B6;
  --node-work: #95A5A6;

  /* Text */
  --text-primary: #e8e8f0;
  --text-secondary: #8888a8;
  --text-muted: #555570;
  --text-accent: var(--accent-light);

  /* Misc */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.45);
  --shadow-glow: 0 0 30px rgba(99,102,241,0.12);

  /* Layout */
  --header-height: auto;
  --timeline-height: 52px;
  --sidebar-width: 400px;
}

html {
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  height: 100vh;
  height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
}

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

/* ============================================================
   LOADING OVERLAY
   ============================================================ */
.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-base);
  transition: opacity 0.5s ease, visibility 0.5s ease;
}
.loading-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.loading-content { text-align: center; }
.loading-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--text-muted);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 20px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.loading-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

/* ============================================================
   ERROR OVERLAY
   ============================================================ */
.error-overlay {
  position: fixed;
  inset: 0;
  z-index: 9998;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(8px);
}
.error-content {
  text-align: center;
  max-width: 420px;
  padding: 40px;
}
.error-content h2 {
  font-size: 1.4rem;
  margin: 16px 0 8px;
  color: var(--text-primary);
}
.error-content p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================================
   HEADER
   ============================================================ */
.header {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
  padding: 14px 24px;
  z-index: 100;
  flex-shrink: 0;
}
.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 12px;
}
.header-brand { display: flex; align-items: baseline; gap: 12px; }
.header-title {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, var(--accent-light), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.header-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.04em;
}

/* Stats pills */
.header-stats {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.stat-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-dim);
  border: 1px solid var(--glass-border);
  border-radius: 100px;
  padding: 4px 12px;
  font-size: 0.75rem;
  white-space: nowrap;
}
.stat-value {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  color: var(--accent-light);
}
.stat-label { color: var(--text-secondary); }

/* Controls row */
.header-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* Search box */
.search-box {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1 1 260px;
  max-width: 360px;
  background: var(--bg-input);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 0 12px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.search-icon {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  flex-shrink: 0;
}
#search-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.85rem;
  padding: 8px 8px;
}
#search-input::placeholder { color: var(--text-muted); }
.search-count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.search-clear {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0 4px;
  display: none;
  line-height: 1;
  transition: color var(--transition);
}
.search-clear:hover { color: var(--text-primary); }
.search-clear.visible { display: block; }

/* Filter selects */
.filter-group {
  display: flex;
  gap: 8px;
}
.filter-select {
  background: var(--bg-input);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.8rem;
  padding: 7px 28px 7px 12px;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238888a8' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  transition: border-color var(--transition);
}
.filter-select:focus {
  outline: none;
  border-color: var(--accent);
}
.filter-select option {
  background: var(--bg-card);
  color: var(--text-primary);
}

/* Toggles */
.toggle-group {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
}
.toggle-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.78rem;
  color: var(--text-secondary);
  user-select: none;
  white-space: nowrap;
}
.toggle-label input { display: none; }
.toggle-switch {
  width: 34px;
  height: 18px;
  background: var(--text-muted);
  border-radius: 100px;
  position: relative;
  transition: background var(--transition);
  flex-shrink: 0;
}
.toggle-switch::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  background: white;
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: transform var(--transition);
}
.toggle-label input:checked + .toggle-switch {
  background: var(--accent);
}
.toggle-label input:checked + .toggle-switch::after {
  transform: translateX(16px);
}

/* Layout spacing sliders */
.slider-group {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}
.slider-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  user-select: none;
}
.slider-text {
  min-width: 48px;
  text-align: right;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
}
.slider-label input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 110px;
  height: 4px;
  background: var(--bg-input);
  border: 1px solid var(--glass-border);
  border-radius: 100px;
  outline: none;
  cursor: pointer;
}
.slider-label input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #ffffff;
  cursor: pointer;
  transition: transform var(--transition);
}
.slider-label input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}
.slider-label input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #ffffff;
  cursor: pointer;
}
.slider-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-primary);
  min-width: 32px;
}

/* Beautify button */
.beautify-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  padding: 7px 14px;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
  box-shadow: 0 2px 12px rgba(99, 102, 241, 0.25);
}
.beautify-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 4px 18px rgba(99, 102, 241, 0.4);
}
.beautify-btn:active:not(:disabled) { transform: translateY(0); }
.beautify-btn:disabled { opacity: 0.6; cursor: wait; }
.beautify-btn.running svg { animation: spin 1.2s linear infinite; }

/* ============================================================
   MAIN CONTENT (Graph + Sidebar)
   ============================================================ */
.main-content {
  display: flex;
  overflow: hidden;
  position: relative;
  min-height: 0;
}

/* Graph */
.graph-container {
  flex: 1;
  position: relative;
  background: var(--bg-base);
  min-height: 0;
  min-width: 0;
  overflow: hidden;
  /* Subtle grid pattern */
  background-image:
    radial-gradient(circle at 50% 50%, rgba(99,102,241,0.03) 0%, transparent 70%),
    linear-gradient(rgba(99,102,241,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,0.04) 1px, transparent 1px);
  background-size: 100% 100%, 60px 60px, 60px 60px;
}
#graph-canvas {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
}
#graph-canvas:active { cursor: grabbing; }

/* Zoom controls */
.zoom-controls {
  position: absolute;
  top: 16px;
  right: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 10;
}
.zoom-btn {
  width: 34px;
  height: 34px;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.zoom-btn:hover {
  border-color: var(--accent);
  color: var(--accent-light);
  background: var(--accent-dim);
}

/* Legend */
.legend {
  position: absolute;
  bottom: 16px;
  left: 16px;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  z-index: 10;
  max-width: 220px;
}
.legend-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.legend-items {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 2px 0;
  transition: color var(--transition);
  user-select: none;
}
.legend-item:hover { color: var(--text-primary); }
.legend-item.muted { opacity: 0.35; }
.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Hover tooltip */
.graph-tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-size: 0.75rem;
  color: var(--text-primary);
  max-width: 260px;
  z-index: 20;
  box-shadow: var(--shadow-lg);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.graph-tooltip-type {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 2px;
}

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
  width: var(--sidebar-width);
  max-width: 30vw;
  flex-shrink: 0;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-left: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  text-align: center;
}
.sidebar-empty-icon {
  color: var(--text-muted);
  margin-bottom: 16px;
  opacity: 0.5;
}
.sidebar-empty-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.sidebar-empty-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  position: relative;
}

.sidebar-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-input);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1;
  z-index: 2;
}
.sidebar-close:hover {
  color: var(--text-primary);
  border-color: var(--glass-border-hover);
}

/* Sidebar header */
.sidebar-header { margin-bottom: 20px; padding-right: 32px; }

.node-type-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 10px;
}
.node-type-badge.episode { background: rgba(74,144,217,0.15); color: #6baaf0; border: 1px solid rgba(74,144,217,0.25); }
.node-type-badge.person  { background: rgba(46,204,113,0.15); color: #5ae08a; border: 1px solid rgba(46,204,113,0.25); }
.node-type-badge.theme   { background: rgba(230,126,34,0.15); color: #f0a050; border: 1px solid rgba(230,126,34,0.25); }
.node-type-badge.concept { background: rgba(155,89,182,0.15); color: #c080e0; border: 1px solid rgba(155,89,182,0.25); }
.node-type-badge.work    { background: rgba(149,165,166,0.15); color: #b0bec5; border: 1px solid rgba(149,165,166,0.25); }

.node-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 4px;
}
.node-meta {
  font-size: 0.78rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.node-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Sidebar body sections */
.sidebar-section {
  margin-bottom: 18px;
}
.sidebar-section-title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* YouTube button */
.yt-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #ff0000, #cc0000);
  color: white;
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  margin-bottom: 6px;
}
.yt-link:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(255,0,0,0.3);
}
.yt-link svg { width: 16px; height: 16px; }

/* Description / Takeaway / Summary text */
.sidebar-text {
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--text-secondary);
}
.sidebar-text.takeaway {
  background: var(--accent-dim);
  border-left: 3px solid var(--accent);
  padding: 10px 14px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-primary);
  font-weight: 500;
}

/* Tags */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.75rem;
  border-radius: 100px;
  background: var(--bg-card-hover);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.tag:hover {
  border-color: var(--accent);
  color: var(--text-accent);
  background: var(--accent-dim);
}

/* Sections / Quotes list */
.sidebar-list {
  list-style: none;
  padding: 0;
}
.sidebar-list li {
  padding: 6px 0;
  font-size: 0.82rem;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  line-height: 1.5;
}
.sidebar-list li:last-child { border-bottom: none; }

/* Quote styling */
.quote-item {
  font-style: italic;
  padding-left: 12px;
  border-left: 2px solid var(--accent-dim);
  color: var(--text-secondary);
}

/* Collapsible */
.collapsible-header {
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 6px;
}
.collapsible-header::before {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 5px solid var(--text-muted);
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  transition: transform var(--transition);
}
.collapsible-header.open::before {
  transform: rotate(90deg);
}
.collapsible-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.collapsible-body.open {
  max-height: 800px;
}

/* Connected episodes */
.connected-ep {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition);
  border-bottom: 1px solid rgba(255,255,255,0.03);
}
.connected-ep:hover { background: var(--bg-card-hover); }
.connected-ep:last-child { border-bottom: none; }
.connected-ep-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.connected-ep-info { flex: 1; min-width: 0; }
.connected-ep-title {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.connected-ep-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  color: var(--text-muted);
}

/* ============================================================
   TIMELINE BAR
   ============================================================ */
.timeline-bar {
  height: var(--timeline-height);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-top: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 16px;
  flex-shrink: 0;
  z-index: 100;
}
.timeline-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  flex-shrink: 0;
}
.timeline-track {
  flex: 1;
  height: 28px;
  display: flex;
  align-items: flex-end;
  gap: 2px;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
}
.timeline-track::-webkit-scrollbar { display: none; }

.timeline-month {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}
.timeline-month-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.55rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.timeline-dots {
  display: flex;
  gap: 2px;
  align-items: flex-end;
}
.timeline-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--node-episode);
  opacity: 0.5;
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}
.timeline-dot:hover {
  opacity: 1;
  transform: scale(1.8);
  box-shadow: 0 0 8px var(--node-episode);
}
.timeline-dot.active {
  opacity: 1;
  transform: scale(1.6);
  background: var(--accent-light);
  box-shadow: 0 0 10px var(--accent-glow);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  :root {
    --sidebar-width: 100%;
  }
  .header { padding: 10px 14px; }
  .header-top { flex-direction: column; align-items: flex-start; }
  .header-stats { width: 100%; }
  .header-controls { flex-direction: column; }
  .search-box { max-width: 100%; }
  .filter-group { width: 100%; }
  .filter-select { flex: 1; }
  .toggle-group { width: 100%; }

  .main-content {
    flex-direction: column;
  }
  .graph-container {
    height: 50vh;
    min-height: 300px;
  }
  .sidebar {
    width: 100%;
    border-left: none;
    border-top: 1px solid var(--glass-border);
    max-height: 50vh;
    overflow-y: auto;
  }
  .stat-pill { font-size: 0.7rem; padding: 3px 8px; }
  .timeline-bar { padding: 0 14px; }
}

@media (max-width: 480px) {
  .header-title { font-size: 0.95rem; }
  .stat-pill:nth-child(4) { display: none; }
  .node-title { font-size: 1.05rem; }
}

/* ============================================================
   UTILITY / ANIMATION
   ============================================================ */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in {
  animation: fadeIn 0.3s ease forwards;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-glow); }
  50% { box-shadow: 0 0 20px 4px var(--accent-glow); }
}