/* Atlas View — Three-Pane Layout */

/* Hide when hidden attribute is present (must come before grid rule) */
#view-atlas.view-content[hidden] {
  display: none !important;
}

/* Apply grid directly to the view container - three columns side by side */
#view-atlas.view-content {
  display: grid;
  grid-template-columns: 280px 1fr 300px;
  grid-template-rows: 1fr;
  gap: 0;
  padding: 0;
  height: 100%;
  width: 100%;
  overflow: hidden;
}

/* Left Panel: Node Info */
.atlas-node-panel {
  grid-column: 1;
  grid-row: 1;
  background: var(--color-surface-2);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
  min-width: 0;
}

/* Right Panel: Traversals */
.atlas-traversal-panel {
  grid-column: 3;
  grid-row: 1;
  background: var(--color-surface-2);
  border-left: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
  min-width: 0;
}

/* Shared Panel Styles */
.panel-header {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.panel-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin: 0;
}

.panel-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-md);
  min-height: 0;
}

/* Middle: Canvas Area */
.atlas-canvas-area {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--color-surface-0);
  background-image: radial-gradient(circle at 50% 50%, rgba(245, 158, 11, 0.03) 0%, transparent 60%);
  position: relative;
  min-height: 0;
  min-width: 0;
}

.atlas-canvas-area .canvas {
  flex: 1;
  width: 100%;
  min-height: 0;
}

.atlas-legend {
  display: flex;
  gap: var(--spacing-lg);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: rgba(15, 23, 42, 0.8);
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}

/* =========================================
   LEFT PANEL: Node Info
   ========================================= */

.node-panel-empty {
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  font-style: italic;
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
}

.node-info {
  padding: 0;
}

.node-info-header {
  margin-bottom: var(--spacing-md);
}

.node-info-id {
  font-family: monospace;
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.node-info-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.node-info-role {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.4;
  margin-bottom: var(--spacing-sm);
}

.node-info-tones {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.node-tone-tag {
  font-size: 0.7rem;
  background: var(--color-bg);
  color: var(--color-text-muted);
  padding: 2px 8px;
  border-radius: 10px;
  font-style: italic;
}

.node-info-section {
  margin-bottom: var(--spacing-md);
}

.node-info-section-title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

/* Polarity display */
.node-polarity {
  display: flex;
  gap: var(--spacing-sm);
}

.node-polarity-card {
  flex: 1;
  background: var(--color-bg);
  border-radius: 6px;
  padding: var(--spacing-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: center;
}

.node-polarity-card:hover {
  background: var(--color-bg-hover);
}

.node-polarity-id {
  font-family: monospace;
  font-weight: 700;
  font-size: 1rem;
}

.node-polarity-title {
  font-size: 0.7rem;
  color: var(--color-text-muted);
}

/* Condition siblings */
.node-siblings {
  display: flex;
  gap: 4px;
}

.node-sibling-chip {
  font-family: monospace;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 4px;
  background: var(--color-bg);
  cursor: pointer;
  transition: all 0.15s ease;
}

.node-sibling-chip:hover {
  background: var(--color-bg-hover);
}

.node-sibling-chip.current {
  background: var(--color-primary);
  color: white;
}

/* =========================================
   RIGHT PANEL: Traversals
   ========================================= */

.traversal-section {
  margin-bottom: var(--spacing-lg);
}

.traversal-section .section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
}

.section-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin: 0;
}

/* Path Sequence Display */
.path-sequence {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  padding: var(--spacing-sm);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  min-height: 40px;
  margin-bottom: var(--spacing-sm);
}

.path-sequence .hint {
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-style: italic;
}

.node-chip {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: monospace;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
}

.node-chip.arc-D {
  background: rgba(139, 92, 246, 0.2);
  border-color: var(--color-descent);
  color: var(--color-descent);
}

.node-chip.arc-R {
  background: rgba(59, 130, 246, 0.2);
  border-color: var(--color-resonance);
  color: var(--color-resonance);
}

.node-chip.arc-E {
  background: rgba(16, 185, 129, 0.2);
  border-color: var(--color-emergence);
  color: var(--color-emergence);
}

.node-chip.arc-nontion {
  background: rgba(245, 158, 11, 0.2);
  border-color: var(--color-nontion);
  color: var(--color-nontion);
}

.path-sequence .arrow {
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

/* Traversal Actions */
.traversal-actions {
  display: flex;
  gap: var(--spacing-xs);
}

.btn-small {
  padding: 4px 10px;
  font-size: 0.7rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text);
  cursor: pointer;
}

.btn-small:hover:not(:disabled) {
  background: var(--color-bg-hover);
}

.btn-small:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-small.btn-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.btn-small.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

/* Stat Badge */
.stat-badge {
  background: var(--color-bg);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.65rem;
  color: var(--color-text-muted);
}

/* Icon Button */
.btn-icon-small {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  padding: 2px 6px;
  color: var(--color-text-muted);
  border-radius: 4px;
}

.btn-icon-small:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

/* Groups List */
.groups-list {
  margin-bottom: var(--spacing-sm);
}

.groups-list .hint {
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-style: italic;
}

.group-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  margin-bottom: var(--spacing-xs);
  overflow: hidden;
}

.group-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm);
  cursor: pointer;
  background: var(--color-surface-2);
}

.group-header:hover {
  background: var(--color-bg-hover);
}

.group-toggle {
  font-size: 0.65rem;
  color: var(--color-text-muted);
  transition: transform 0.15s ease;
}

.group-item.collapsed .group-toggle {
  transform: rotate(-90deg);
}

.group-name {
  flex: 1;
  font-size: 0.8125rem;
  font-weight: 500;
}

.group-count {
  font-size: 0.65rem;
  color: var(--color-text-muted);
  background: var(--color-bg);
  padding: 1px 6px;
  border-radius: 8px;
}

.group-actions {
  display: flex;
  gap: 2px;
}

.group-content {
  padding: var(--spacing-xs);
}

.group-item.collapsed .group-content {
  display: none;
}

.group-paths {
  min-height: 24px;
}

.group-paths.drag-over,
.paths-list.drag-over {
  background: rgba(99, 102, 241, 0.1);
  border-radius: 4px;
}

/* Paths List */
.paths-list {
  min-height: 40px;
}

.paths-list .hint {
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-style: italic;
}

/* Path Item */
.path-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
  cursor: grab;
  transition: all 0.1s ease;
}

.path-item:hover {
  border-color: var(--color-primary);
}

.path-item.dragging {
  opacity: 0.5;
}

.path-item.visible {
  border-left: 3px solid currentColor;
}

.path-item-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: 4px;
}

.drag-handle {
  color: var(--color-text-muted);
  font-size: 0.7rem;
  cursor: grab;
}

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

.path-name {
  flex: 1;
  font-size: 0.8125rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--color-text);
}

.path-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.875rem;
  opacity: 0.5;
  padding: 2px;
}

.path-toggle.active {
  opacity: 1;
}

.path-preview {
  font-size: 0.7rem;
  font-family: monospace;
  color: var(--color-text-muted);
  margin-bottom: 4px;
  padding-left: 20px;
}

.path-actions {
  display: flex;
  gap: 4px;
  padding-left: 20px;
}

/* Node glow animation */
@keyframes nodeGlow {
  0%, 100% { filter: drop-shadow(0 0 6px var(--glow-color)); }
  50% { filter: drop-shadow(0 0 12px var(--glow-color)); }
}

.node-group.selected .node-circle {
  stroke: white;
  stroke-width: 3;
  animation: nodeGlow 2s ease-in-out infinite;
}

.node-group.dimmed {
  opacity: 0.3;
  transition: opacity 0.3s ease;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

/* --- Tablets / Small Laptops (≤ 1024px) --- */
@media (max-width: 1024px) {
  #view-atlas.view-content {
    grid-template-columns: 220px 1fr 240px;
  }

  .node-info-id {
    font-size: 1.5rem;
  }

  .node-info-title {
    font-size: 0.9375rem;
  }

  .panel-body {
    padding: var(--spacing-sm);
  }
}

/* --- Tablets Portrait / Large Phones (≤ 768px) — Scrollable Vertical Stack --- */
@media (max-width: 768px) {
  #view-atlas.view-content {
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
    height: 100%;
  }

  .atlas-canvas-area {
    grid-column: unset;
    grid-row: unset;
    order: -1;
    height: 65vh;
    min-height: 65vh;
    flex-shrink: 0;
    border-bottom: 1px solid var(--color-border);
  }

  .atlas-node-panel {
    grid-column: unset;
    grid-row: unset;
    order: 0;
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
    overflow: visible;
  }

  .atlas-traversal-panel {
    grid-column: unset;
    grid-row: unset;
    order: 1;
    width: 100%;
    border-left: none;
    border-top: none;
    flex-shrink: 0;
    overflow: visible;
  }

  /* Match Chronicle mini-map node style: semi-transparent, smaller */
  .node-circle {
    fill-opacity: 0.4;
    stroke-opacity: 0.7;
  }

  .node-group.selected .node-circle,
  .node-group.in-sequence .node-circle {
    fill-opacity: 0.8;
    stroke-opacity: 1;
  }

  .node-title-label {
    display: none;
  }

  .node-label {
    font-size: 9px;
  }

  .atlas-legend {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .node-info-header {
    margin-bottom: var(--spacing-sm);
  }

  .node-info-id {
    font-size: 1.25rem;
  }

  .node-info-section {
    margin-bottom: var(--spacing-sm);
  }

  .traversal-section {
    margin-bottom: var(--spacing-sm);
  }
}

/* --- Phones (≤ 480px) --- */
@media (max-width: 480px) {
  .atlas-canvas-area {
    height: 60vh;
    min-height: 60vh;
  }

  .node-info-id {
    font-size: 1.125rem;
  }

  .node-info-title {
    font-size: 0.8125rem;
  }

  .node-info-role {
    font-size: 0.75rem;
  }

  .atlas-legend .legend-item span {
    display: none;
  }

  .atlas-legend {
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  .traversal-actions {
    flex-wrap: wrap;
  }

  .traversal-actions .btn-small {
    font-size: 0.65rem;
    padding: 3px 8px;
  }

  .panel-body {
    padding: var(--spacing-xs);
  }

  .path-sequence {
    padding: var(--spacing-xs);
    min-height: 32px;
  }
}