/* ==========================================================================
   NETWORK VISUALIZATION PAGE — Investigation Knowledge Graph
   Matches D4ARF design system: Bitter + Source Sans 3, #B91C1C red
   ========================================================================== */

/* --- Override Pico container for full-width layout --- */
.network-page main {
  max-width: none;
  padding: 0;
  margin: 0;
}

/* ==========================================================================
   HERO — Compact, editorial header
   ========================================================================== */
.network-hero {
  background-color: var(--d4arf-black);
  padding: 3rem 1.5rem 2.5rem;
  position: relative;
  overflow: hidden;
}

.network-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.network-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--d4arf-red);
}

.network-hero .container {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto;
}

.network-hero-content {
  max-width: 720px;
}

.network-eyebrow {
  color: rgba(255, 255, 255, 0.65);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 0.8rem;
  font-weight: 600;
  font-family: var(--font-body);
  margin: 0 0 1rem;
  padding-left: 1.75rem;
  position: relative;
}

.network-eyebrow::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1rem;
  height: 2px;
  background: var(--d4arf-red);
}

.network-hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: #fff;
  margin-bottom: 1rem;
  line-height: 1.15;
  letter-spacing: -0.015em;
  font-family: var(--font-display);
}

.network-hero-sub {
  font-size: clamp(0.95rem, 1.5vw, 1.05rem);
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin: 0;
  line-height: 1.7;
}

.network-hero-sub strong {
  color: rgba(255, 255, 255, 0.9);
}

/* ==========================================================================
   NETWORK APP LAYOUT — Sidebar + Graph + Detail Panel
   ========================================================================== */
.network-app {
  background: var(--d4arf-white);
}

.network-layout {
  display: grid;
  grid-template-columns: 260px 1fr 320px;
  min-height: calc(100vh - 60px);
}

/* ==========================================================================
   SIDEBAR — Filters, search, tours, legend
   ========================================================================== */
.network-sidebar {
  background: #fff;
  border-right: 1px solid var(--d4arf-border);
  padding: 1.5rem 1.25rem;
  overflow-y: auto;
  max-height: calc(100vh - 60px);
  position: sticky;
  top: 60px;
}

.sidebar-section {
  margin-bottom: 1.75rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--d4arf-border);
}

.sidebar-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.sidebar-heading {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--d4arf-gray);
  margin: 0 0 0.75rem;
}

/* --- Type Filters --- */
.type-filters {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.type-filter {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  font-family: var(--font-body);
  color: var(--d4arf-black);
  transition: background-color 0.15s;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.type-filter:hover {
  background: var(--d4arf-gray-light);
}

.type-filter.active {
  background: var(--d4arf-gray-light);
  font-weight: 600;
}

.type-filter-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.type-filter-label {
  flex-grow: 1;
}

.type-filter-count {
  font-size: 0.75rem;
  color: var(--d4arf-gray);
  font-variant-numeric: tabular-nums;
}

/* --- Search --- */
.search-wrapper {
  position: relative;
}

.node-search {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--d4arf-border);
  border-radius: 6px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--d4arf-black);
  background: #fff;
  outline: none;
  transition: border-color 0.15s;
}

.node-search:focus {
  border-color: var(--d4arf-red);
  box-shadow: 0 0 0 2px rgba(185, 28, 28, 0.1);
}

.node-search::placeholder {
  color: #999;
}

.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: #fff;
  border: 1px solid var(--d4arf-border);
  border-top: none;
  border-radius: 0 0 6px 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  z-index: 50;
  max-height: 200px;
  overflow-y: auto;
  display: none;
}

.search-results.open {
  display: block;
}

.search-result-item {
  padding: 0.5rem 0.75rem;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-body);
  color: var(--d4arf-black);
}

.search-result-item:hover,
.search-result-item:focus {
  background: var(--d4arf-gray-light);
}

.search-result-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* --- Guided Tours --- */
.tour-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tour-btn {
  display: block;
  width: 100%;
  padding: 0.65rem 0.75rem;
  background: var(--d4arf-gray-light);
  border: 1px solid var(--d4arf-border);
  border-left: 3px solid var(--d4arf-red);
  border-radius: 0 6px 6px 0;
  cursor: pointer;
  text-align: left;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
  font-family: var(--font-body);
}

.tour-btn:hover {
  transform: translateY(-2px);
  border-left-color: var(--d4arf-red);
  border-color: var(--d4arf-red);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  background: #fff;
}

.tour-btn:focus-visible {
  outline: 3px solid var(--d4arf-red);
  outline-offset: 2px;
}

.tour-btn.tour-active {
  background: var(--d4arf-red-light);
  border-left-color: var(--d4arf-red);
}

.tour-btn-title {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--d4arf-black);
  margin-bottom: 0.15rem;
}

.tour-btn-desc {
  display: block;
  font-size: 0.75rem;
  color: var(--d4arf-gray);
  line-height: 1.4;
}

/* --- Legend --- */
.legend-list {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--d4arf-gray);
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ==========================================================================
   GRAPH AREA — Light editorial canvas with controls
   ========================================================================== */
.network-graph-area {
  position: relative;
  background: #F8F7F5;
  overflow: hidden;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.06);
}

/* Subtle grid texture — graph-paper grounding on light background */
.network-graph-area::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 0, 0, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 0, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  z-index: 1;
}

/* Vignette — very subtle inward shadow to frame content */
.network-graph-area::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, transparent 50%, rgba(0, 0, 0, 0.03) 100%);
  pointer-events: none;
  z-index: 2;
}

.network-graph {
  width: 100%;
  height: calc(100vh - 60px);
  position: sticky;
  top: 60px;
  z-index: 3;
}

.network-graph svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* --- Loading state --- */
.graph-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.graph-loading p {
  color: var(--d4arf-gray);
  font-family: var(--font-body);
  font-size: 0.9rem;
}

.graph-loading.hidden {
  display: none;
}

/* --- Graph controls --- */
.graph-controls {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 15;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.graph-control-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border: 1px solid var(--d4arf-border);
  border-radius: 6px;
  color: var(--d4arf-gray);
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  transition: background-color 0.15s, color 0.15s;
}

.graph-control-btn:hover {
  background: var(--d4arf-gray-light);
  color: var(--d4arf-black);
}

/* --- Graph hint --- */
.graph-hint {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 15;
  pointer-events: none;
  transition: opacity 0.3s;
}

.graph-hint.hidden {
  opacity: 0;
}

.graph-hint p {
  font-size: 0.8rem;
  color: var(--d4arf-gray);
  font-family: var(--font-body);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--d4arf-border);
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
  margin: 0;
}

/* --- Graph node styles (applied via JS) --- */
.node-label {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;
  fill: #374151;
  pointer-events: none;
  text-anchor: middle;
  dominant-baseline: central;
}

.node-label-bg {
  fill: rgba(248, 247, 245, 0.8);
  pointer-events: none;
}

.link-line {
  stroke: rgba(0, 0, 0, 0.08);
  stroke-width: 1;
  fill: none;
}

.link-line.highlighted {
  stroke: rgba(185, 28, 28, 0.5);
  stroke-width: 2;
}

.link-line.tour-highlight {
  stroke: var(--d4arf-red);
  stroke-width: 2;
  opacity: 0.6;
  stroke-dasharray: none;
}

.node-circle {
  cursor: pointer;
  transition: r 0.15s;
  stroke: #fff;
  stroke-width: 2;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.12));
}

.node-circle.selected {
  stroke: var(--d4arf-red);
  stroke-width: 3;
  filter: drop-shadow(0 2px 6px rgba(185, 28, 28, 0.3));
}

.node-circle.dimmed {
  opacity: 0.12;
}

.node-circle.tour-highlight {
  stroke: var(--d4arf-red);
  stroke-width: 3;
  filter: drop-shadow(0 0 8px rgba(185, 28, 28, 0.25));
}

.node-label.dimmed {
  opacity: 0.06;
}

.link-line.dimmed {
  opacity: 0.03;
}

/* ==========================================================================
   DETAIL PANEL — Entity inspection
   ========================================================================== */
.network-detail {
  background: #fff;
  border-left: 1px solid var(--d4arf-border);
  overflow-y: auto;
  max-height: calc(100vh - 60px);
  position: sticky;
  top: 60px;
}

.detail-empty {
  padding: 3rem 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 300px;
}

.detail-empty-icon {
  color: var(--d4arf-border);
  margin-bottom: 1rem;
}

.detail-empty-text {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--d4arf-gray);
  margin: 0 0 0.35rem;
}

.detail-empty-hint {
  font-size: 0.85rem;
  color: #999;
  margin: 0;
}

.detail-content {
  padding: 1.25rem;
  position: relative;
}

.detail-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--d4arf-border);
  border-radius: 4px;
  font-size: 1.1rem;
  color: var(--d4arf-gray);
  cursor: pointer;
  line-height: 1;
}

.detail-close:hover {
  background: var(--d4arf-gray-light);
  color: var(--d4arf-black);
}

.detail-header {
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--d4arf-red);
}

.detail-type-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  margin-bottom: 0.5rem;
  color: #fff;
}

.detail-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--d4arf-black);
  margin: 0;
  line-height: 1.25;
}

.detail-section {
  margin-bottom: 1.25rem;
}

.detail-section-heading {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--d4arf-gray);
  margin: 0 0 0.5rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--d4arf-border);
}

.detail-observations {
  list-style: none;
  padding: 0;
  margin: 0;
}

.detail-observations li {
  font-size: 0.85rem;
  color: var(--d4arf-gray);
  line-height: 1.55;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--d4arf-gray-light);
  padding-left: 0.75rem;
  position: relative;
}

.detail-observations li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7rem;
  width: 4px;
  height: 4px;
  background: var(--d4arf-red);
  border-radius: 50%;
}

.detail-observations li:last-child {
  border-bottom: none;
}

.detail-connections {
  list-style: none;
  padding: 0;
  margin: 0;
}

.detail-connections li {
  font-size: 0.85rem;
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--d4arf-gray-light);
  line-height: 1.5;
}

.detail-connections li:last-child {
  border-bottom: none;
}

.detail-connection-link {
  color: var(--d4arf-red);
  cursor: pointer;
  font-weight: 600;
  text-decoration: none;
  background: none;
  border: none;
  padding: 0;
  font-family: var(--font-body);
  font-size: 0.85rem;
}

.detail-connection-link:hover {
  text-decoration: underline;
}

.detail-connection-type {
  color: var(--d4arf-gray);
  font-size: 0.75rem;
  display: block;
  margin-top: 0.1rem;
}

/* ==========================================================================
   TOUR NARRATION — Floating tour step
   ========================================================================== */
.tour-narration {
  position: absolute;
  bottom: 4rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 25;
  background: #fff;
  border: 1px solid var(--d4arf-border);
  border-left: 4px solid var(--d4arf-red);
  border-radius: 0 8px 8px 0;
  padding: 1rem 1.25rem;
  max-width: 480px;
  width: calc(100% - 2rem);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1), 0 1px 3px rgba(0, 0, 0, 0.06);
  display: none;
}

.tour-narration.visible {
  display: block;
}

.tour-narration-step {
  font-size: 0.7rem;
  color: var(--d4arf-gray);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  margin: 0 0 0.35rem;
}

.tour-narration-text {
  font-size: 0.9rem;
  color: var(--d4arf-black);
  line-height: 1.6;
  margin: 0 0 0.75rem;
}

.tour-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.tour-nav-btn {
  padding: 0.35rem 0.85rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.8rem;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid var(--d4arf-border);
  background: #fff;
  color: var(--d4arf-gray);
  transition: background-color 0.15s, color 0.15s;
}

.tour-nav-btn:hover {
  background: var(--d4arf-gray-light);
  color: var(--d4arf-black);
}

.tour-nav-btn.tour-next {
  background: var(--d4arf-red);
  color: #fff;
  border-color: var(--d4arf-red);
}

.tour-nav-btn.tour-next:hover {
  background: var(--d4arf-link-hover);
}

.tour-nav-btn.tour-exit {
  background: none;
  border: none;
  color: var(--d4arf-gray);
  font-size: 0.75rem;
}

.tour-nav-btn.tour-exit:hover {
  color: var(--d4arf-red);
}

/* ==========================================================================
   RESPONSIVE — Collapse to stacked layout on mobile/tablet
   ========================================================================== */
@media (max-width: 1024px) {
  .network-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto 70vh auto;
  }

  .network-sidebar {
    position: static;
    max-height: none;
    border-right: none;
    border-bottom: 1px solid var(--d4arf-border);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 1.5rem;
    padding: 1.25rem;
  }

  .network-sidebar .sidebar-section {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
  }

  .sidebar-legend {
    display: none;
  }

  .network-graph-area {
    height: 70vh;
  }

  .network-graph {
    position: relative;
    height: 100%;
  }

  .network-detail {
    position: static;
    max-height: none;
    border-left: none;
    border-top: 1px solid var(--d4arf-border);
  }

  .tour-narration {
    bottom: 1rem;
    max-width: calc(100% - 2rem);
  }
}

@media (max-width: 600px) {
  .network-hero {
    padding: 2rem 1.5rem 1.5rem;
  }

  .network-hero h1 {
    font-size: 1.5rem;
  }

  .network-sidebar {
    grid-template-columns: 1fr;
  }

  .network-layout {
    grid-template-rows: auto 60vh auto;
  }

  .network-graph-area {
    height: 60vh;
  }

  .graph-controls {
    top: 0.5rem;
    right: 0.5rem;
  }
}

/* ==========================================================================
   DARK MODE — Network page overrides
   ========================================================================== */

/* --- Network hero: already visually dark, pin background --- */
[data-theme="dark"] .network-hero {
  background-color: #0D0D12;
}

/* --- App layout background --- */
[data-theme="dark"] .network-app {
  background: var(--d4arf-white);
}

/* --- Sidebar --- */
[data-theme="dark"] .network-sidebar {
  background: #15151D;
  border-right-color: var(--d4arf-border);
}

[data-theme="dark"] .sidebar-section {
  border-bottom-color: var(--d4arf-border);
}

/* Type filter buttons */
[data-theme="dark"] .type-filter {
  color: var(--d4arf-black);
}

[data-theme="dark"] .type-filter:hover {
  background: var(--d4arf-gray-light);
}

[data-theme="dark"] .type-filter.active {
  background: var(--d4arf-gray-light);
}

/* Search */
[data-theme="dark"] .node-search {
  background: #1A1A24;
  border-color: var(--d4arf-border);
  color: var(--d4arf-black);
}

[data-theme="dark"] .node-search::placeholder {
  color: #6B7280;
}

[data-theme="dark"] .node-search:focus {
  border-color: var(--d4arf-red);
  box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.15);
}

[data-theme="dark"] .search-results {
  background: #1A1A24;
  border-color: var(--d4arf-border);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .search-result-item {
  color: var(--d4arf-black);
}

[data-theme="dark"] .search-result-item:hover,
[data-theme="dark"] .search-result-item:focus {
  background: var(--d4arf-gray-light);
}

/* Tour buttons */
[data-theme="dark"] .tour-btn {
  background: var(--d4arf-gray-light);
  border-color: var(--d4arf-border);
}

[data-theme="dark"] .tour-btn:hover {
  background: #1A1A24;
}

[data-theme="dark"] .tour-btn.tour-active {
  background: var(--d4arf-red-light);
}

[data-theme="dark"] .tour-btn-title {
  color: var(--d4arf-black);
}

/* --- Graph area --- */
[data-theme="dark"] .network-graph-area {
  background: #16161E;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .network-graph-area::before {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
}

[data-theme="dark"] .network-graph-area::after {
  background: radial-gradient(ellipse at 50% 50%, transparent 50%, rgba(0, 0, 0, 0.15) 100%);
}

/* Graph controls */
[data-theme="dark"] .graph-control-btn {
  background: #1A1A24;
  border-color: var(--d4arf-border);
  color: var(--d4arf-gray);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .graph-control-btn:hover {
  background: var(--d4arf-gray-light);
  color: var(--d4arf-black);
}

/* Graph hint */
[data-theme="dark"] .graph-hint p {
  background: rgba(18, 18, 24, 0.85);
  border-color: var(--d4arf-border);
  color: var(--d4arf-gray);
}

/* Node labels — JS sets fill, but CSS class overrides */
[data-theme="dark"] .node-label {
  fill: #F3F4F6;
}

[data-theme="dark"] .node-label-bg {
  fill: rgba(22, 22, 30, 0.85);
}

/* Link lines */
[data-theme="dark"] .link-line {
  stroke: #6B7280;
  stroke-opacity: 0.5;
}

[data-theme="dark"] .link-line.highlighted {
  stroke: rgba(239, 68, 68, 0.7);
  stroke-opacity: 0.9;
}

[data-theme="dark"] .link-line.tour-highlight {
  stroke: var(--d4arf-red);
  stroke-opacity: 0.9;
}

/* Node circles */
[data-theme="dark"] .node-circle {
  stroke: #1A1A24;
}

[data-theme="dark"] .node-circle.selected {
  stroke: var(--d4arf-red);
}

/* --- Detail panel --- */
[data-theme="dark"] .network-detail {
  background: #15151D;
  border-left-color: var(--d4arf-border);
}

[data-theme="dark"] .detail-close {
  border-color: var(--d4arf-border);
  color: var(--d4arf-gray);
}

[data-theme="dark"] .detail-close:hover {
  background: var(--d4arf-gray-light);
  color: var(--d4arf-black);
}

[data-theme="dark"] .detail-header {
  border-bottom-color: var(--d4arf-red);
}

[data-theme="dark"] .detail-section-heading {
  border-bottom-color: var(--d4arf-border);
}

[data-theme="dark"] .detail-observations li {
  border-bottom-color: var(--d4arf-gray-light);
}

[data-theme="dark"] .detail-connections li {
  border-bottom-color: var(--d4arf-gray-light);
}

/* --- Tour narration --- */
[data-theme="dark"] .tour-narration {
  background: #1A1A24;
  border-color: var(--d4arf-border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] .tour-nav-btn {
  border-color: var(--d4arf-border);
  background: #1A1A24;
  color: var(--d4arf-gray);
}

[data-theme="dark"] .tour-nav-btn:hover {
  background: var(--d4arf-gray-light);
  color: var(--d4arf-black);
}

[data-theme="dark"] .tour-nav-btn.tour-next {
  background: var(--d4arf-red);
  color: #fff;
  border-color: var(--d4arf-red);
}

/* --- Responsive overrides --- */
@media (max-width: 1024px) {
  [data-theme="dark"] .network-sidebar {
    border-bottom-color: var(--d4arf-border);
  }

  [data-theme="dark"] .network-detail {
    border-top-color: var(--d4arf-border);
    border-left: none;
  }
}

/* ==========================================================================
   PRINT — Hide interactive elements
   ========================================================================== */
@media print {
  .network-sidebar,
  .graph-controls,
  .graph-hint,
  .tour-narration {
    display: none;
  }

  .network-layout {
    grid-template-columns: 1fr;
  }

  .network-graph-area {
    height: 600px;
  }
}