:root {
  --bg-primary: #0b0f17;
  --bg-secondary: #131b2a;
  --bg-card: #1a2336;
  --bg-hover: #223048;
  --bg-input: #0f172a;
  --border-color: #233148;
  --border-focus: #38bdf8;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent-blue: #38bdf8;
  --accent-primary: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-red: #ef4444;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --sidebar-w: 300px;
  --inspector-w: 320px;
  --nav-h: 56px;
  --status-h: 34px;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  height: 100vh;
  overflow: hidden;
  user-select: none;
  -webkit-font-smoothing: antialiased;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
}

/* ---------------- Top Navbar ---------------- */
#top-nav {
  height: var(--nav-h);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 100;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-mark {
  background: linear-gradient(135deg, #2563eb, #38bdf8);
  width: 34px;
  height: 34px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.4);
}

.brand-text {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.brand-name {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.02em;
  color: #fff;
}

.brand-badge {
  font-size: 10px;
  font-weight: 600;
  background-color: rgba(56, 189, 248, 0.15);
  color: var(--accent-blue);
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: uppercase;
}

/* History Navigation Arrows (Undo / Redo) directly next to Brand title */
.history-nav-group {
  display: flex;
  align-items: center;
  gap: 3px;
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 2px 3px;
  margin-left: 6px;
}

.btn-history-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.15s ease;
  padding: 0;
}

.btn-history-nav:hover:not(:disabled) {
  background-color: rgba(56, 189, 248, 0.18);
  color: #38bdf8;
  transform: translateY(-1px);
}

.btn-history-nav:active:not(:disabled) {
  transform: translateY(0);
}

.btn-history-nav:disabled {
  opacity: 0.25;
  cursor: not-allowed;
  pointer-events: none;
}

/* View Switchers Tabs */
.view-switchers {
  display: flex;
  background-color: var(--bg-input);
  padding: 3px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tab-btn:hover {
  color: var(--text-main);
}

.tab-btn.active {
  background-color: var(--accent-primary);
  color: #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

/* Top Actions */
.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.action-group {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
}

.select-dropdown {
  background-color: var(--bg-input);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  outline: none;
}

.select-dropdown:focus {
  border-color: var(--border-focus);
}

.sidebar-toggle-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.divider-vertical {
  width: 1px;
  height: 24px;
  background-color: var(--border-color);
  margin: 0 4px;
}

@media (max-width: 1100px) {
  .btn-label-responsive {
    display: none;
  }
}

/* Generic Buttons */
button {
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.15s ease;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #fff;
  border: none;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 500;
}
.btn-primary:hover {
  background-color: var(--accent-hover);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  font-size: 12px;
}
.btn-secondary:hover {
  background-color: var(--bg-hover);
  border-color: var(--text-dim);
}

.btn-secondary-full {
  width: 100%;
  background-color: var(--bg-hover);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 8px;
  font-size: 12px;
  font-weight: 500;
  border-radius: 6px;
}
.btn-secondary-full:hover {
  background-color: var(--border-color);
  border-color: var(--accent-blue);
}

.btn-icon {
  background-color: var(--bg-input);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  padding: 6px 10px;
  font-size: 12px;
}
.btn-icon.active {
  background-color: rgba(56, 189, 248, 0.15);
  color: var(--accent-blue);
  border-color: var(--accent-blue);
}

.btn-danger {
  background-color: rgba(239, 68, 68, 0.15);
  color: var(--accent-red);
  border: 1px solid rgba(239, 68, 68, 0.4);
  padding: 6px 12px;
  font-size: 12px;
}
.btn-danger:hover {
  background-color: var(--accent-red);
  color: #fff;
}

.btn-danger-outline {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border-color);
  padding: 6px 8px;
}
.btn-danger-outline:hover {
  color: var(--accent-red);
  border-color: var(--accent-red);
}

/* ---------------- Workspace Layout ---------------- */
#workspace-container {
  display: flex;
  flex: 1;
  height: calc(100vh - var(--nav-h) - var(--status-h));
  position: relative;
  overflow: hidden;
}

/* Sidebar Panels (Left Explorer & Right Inspector/Catalog) */
.sidebar-panel {
  background-color: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1), 
              min-width 0.25s cubic-bezier(0.4, 0, 0.2, 1), 
              opacity 0.2s ease, 
              padding 0.25s ease;
  position: relative;
  z-index: 20;
}

/* Left Sidebar: Drawing Explorer */
#sidebar-left {
  width: 340px;
  min-width: 240px;
  max-width: 650px;
  border-right: 1px solid var(--border-color);
  position: relative;
}

/* Sub-panels inside Left Sidebar (Split 50/50 between Explorer and Inspector) */
.sub-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

#panel-explorer {
  flex: 1 1 50%;
  min-height: 120px;
}

#panel-inspector {
  flex: 1 1 50%;
  min-height: 140px;
  border-top: 1px solid var(--border-color);
}

.inspector-scroll-body {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}

/* Inspector Tab Strip (Inspector / Statistieken) */
.insp-tab-strip {
  display: flex;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 4px 6px 0 6px;
  gap: 4px;
  flex-shrink: 0;
}

.insp-tab-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  border-radius: 4px 4px 0 0;
  transition: all 0.15s ease;
}

.insp-tab-btn:hover {
  color: var(--text-main);
  background-color: var(--bg-hover);
}

.insp-tab-btn.active {
  color: var(--accent-blue);
  border-bottom-color: var(--accent-blue);
  background-color: var(--bg-card);
  font-weight: 600;
}

.insp-subtitle-row {
  margin-bottom: 8px;
  padding: 2px 4px;
}

/* Horizontal Resizer between Explorer and Inspector */
.resizer-h {
  height: 7px;
  background-color: var(--border-color);
  cursor: row-resize;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  flex-shrink: 0;
  z-index: 15;
  transition: background-color 0.15s ease;
}

.resizer-h:hover,
.resizer-h.resizing {
  background-color: var(--accent-blue);
}

.resizer-grip {
  width: 32px;
  height: 2px;
  background-color: var(--text-dim);
  border-radius: 1px;
}

/* Vertical Resizers (Left sidebar edge, Right sidebar edge, Viewport split) */
.resizer-v {
  width: 6px;
  cursor: col-resize;
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  z-index: 25;
  user-select: none;
  transition: background-color 0.15s ease;
}

.resizer-v.left-edge {
  left: 0;
  right: auto;
}

.resizer-v:hover,
.resizer-v.resizing {
  background-color: var(--accent-blue);
}

/* Viewport Split-Screen Center Divider */
.resizer-v.split-resizer {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 8px;
  background-color: var(--border-color);
  cursor: col-resize;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 25;
  transition: background-color 0.15s ease;
}

.resizer-v.split-resizer:hover,
.resizer-v.split-resizer.resizing {
  background-color: var(--accent-blue);
}

.split-resizer-grip {
  width: 2px;
  height: 36px;
  background-color: var(--text-dim);
  border-radius: 1px;
}

/* Right Sidebar: Part Catalog with Tabs */
#sidebar-right {
  width: 340px;
  min-width: 260px;
  max-width: 650px;
  border-left: 1px solid var(--border-color);
  position: relative;
}

/* 5 Catalog Category Tabs (Percelen, Fundering, Huis, Ramen & Deuren, Tuin) */
.catalog-category-tabs {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 2px;
  padding: 6px 4px;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.cat-tab-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 5px 1px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--text-dim);
  font-size: 10px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: all 0.15s ease;
}
  cursor: pointer;
  transition: all 0.15s ease;
}

.cat-tab-btn:hover {
  background-color: var(--bg-hover);
  color: #fff;
}

.cat-tab-btn.active {
  background-color: rgba(56, 189, 248, 0.15);
  border-color: var(--accent-blue);
  color: #fff;
}

.cat-icon {
  font-size: 15px;
  margin-bottom: 2px;
}

.cat-text {
  font-size: 10.5px;
  white-space: nowrap;
}

/* Collapsed States (Used for Split Screen and manual toggling) */
#workspace-container.collapse-left #sidebar-left {
  width: 0 !important;
  min-width: 0 !important;
  max-width: 0 !important;
  border-right: none !important;
  padding: 0 !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

#workspace-container.collapse-right #sidebar-right {
  width: 0 !important;
  min-width: 0 !important;
  max-width: 0 !important;
  border-left: none !important;
  padding: 0 !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

/* Explorer Body */
.explorer-body {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.explorer-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.explorer-section.flex-grow {
  flex: 1;
  min-height: 160px;
  display: flex;
  flex-direction: column;
}

.section-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
}

.badge-count {
  background-color: var(--bg-card);
  color: var(--accent-blue);
  padding: 1px 7px;
  border-radius: 10px;
  font-size: 10px;
  font-family: var(--font-mono);
  font-weight: 600;
  border: 1px solid var(--border-color);
}

.plot-summary-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px;
}

.plot-summary-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.plot-summary-header strong {
  color: var(--accent-blue);
  font-size: 14px;
  font-family: var(--font-mono);
}

.badge {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  background-color: var(--bg-input);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  font-family: var(--font-mono);
}

.plot-inputs-grid.compact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.plot-inputs-grid.compact input {
  padding: 4px 6px;
  font-size: 11px;
}

.plot-presets-row {
  display: flex;
  gap: 4px;
  margin-top: 6px;
}

.btn-preset {
  flex: 1;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 10px;
  padding: 4px 2px;
  border-radius: 4px;
  cursor: pointer;
  font-family: var(--font-mono);
  transition: all 0.15s ease;
}

.btn-preset:hover {
  background-color: var(--bg-hover);
  color: #fff;
  border-color: var(--accent-blue);
}

/* Explorer Tree Hierarchy */
.explorer-tree {
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow-y: auto;
  flex: 1;
  max-height: 380px;
  padding-right: 2px;
}

.tree-node {
  display: flex;
  flex-direction: column;
}

.tree-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.12s ease;
  user-select: none;
  border: 1px solid transparent;
}

.tree-row:hover {
  background-color: var(--bg-hover);
  color: #fff;
}

.tree-row.selected {
  background-color: rgba(56, 189, 248, 0.15);
  border-color: var(--accent-blue);
  color: #fff;
  box-shadow: 0 0 8px rgba(56, 189, 248, 0.2);
}

/* Tree Drag-and-Drop between Levels */
.tree-row[draggable="true"] {
  cursor: grab;
}

.tree-row[draggable="true"]:active {
  cursor: grabbing;
}

.tree-row.is-dragging {
  opacity: 0.45;
  border: 1px dashed var(--accent-blue);
  background-color: rgba(56, 189, 248, 0.1);
}

.tree-node.tree-level.drag-over > .tree-row {
  background-color: rgba(56, 189, 248, 0.25) !important;
  border: 1px dashed var(--accent-blue) !important;
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.35);
  transform: scale(1.01);
}

.tree-empty-drop-target {
  animation: fadeIn 0.15s ease-out;
}

.drop-target-row {
  border: 1px dashed rgba(56, 189, 248, 0.6) !important;
  background-color: rgba(56, 189, 248, 0.08) !important;
}

.empty-drop-label {
  font-size: 10px;
  color: var(--accent-blue);
  font-style: italic;
  font-weight: normal;
  margin-left: 4px;
}

.tree-toggle {
  background: transparent;
  border: none;
  color: var(--text-muted);
  width: 14px;
  height: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  cursor: pointer;
  padding: 0;
  transition: transform 0.15s ease;
  flex-shrink: 0;
}

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

.tree-icon {
  font-size: 13px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tree-label {
  font-size: 12px;
  font-weight: 500;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-main);
}

.tree-meta {
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--accent-blue);
  background-color: rgba(56, 189, 248, 0.12);
  padding: 1px 5px;
  border-radius: 3px;
  flex-shrink: 0;
}

.tree-badge {
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--text-dim);
  background-color: var(--bg-input);
  padding: 1px 4px;
  border-radius: 3px;
  border: 1px solid var(--border-color);
  flex-shrink: 0;
}

.tree-children {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 12px;
  margin-left: 7px;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
}

.tree-children.collapsed {
  display: none;
}

.tree-row .tree-item-actions {
  display: none;
  align-items: center;
  gap: 4px;
}

.tree-row:hover .tree-item-actions {
  display: flex;
}

.tree-action-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tree-action-btn:hover {
  background-color: var(--bg-input);
  color: var(--accent-blue);
}

.tree-action-btn.btn-del:hover {
  color: var(--accent-red);
}

.tree-action-btn.btn-lock,
.tree-action-btn.btn-lvl-lock {
  font-size: 11px;
  line-height: 1;
}

.tree-action-btn.btn-lock.locked,
.tree-action-btn.btn-lvl-lock.locked {
  color: #f59e0b;
}

.tree-row.is-locked {
  border-left: 2px solid #f59e0b;
}

.tree-badge-sym {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  margin: 0 4px;
  cursor: help;
  flex-shrink: 0;
}

/* 3D Coordinates Row */
.coords-row.coords-3d {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 6px;
}

.coord-z-highlight {
  border-color: rgba(56, 189, 248, 0.4) !important;
}

.coord-z-highlight span {
  color: var(--accent-blue) !important;
  font-weight: 700;
}

/* Snap to Top Button */
.btn-snap-top {
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.4);
  color: var(--accent-blue);
  border-radius: 4px;
  padding: 2px 7px;
  font-size: 10px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-snap-top:hover {
  background: var(--accent-blue);
  color: #0b0f17;
}

.stat-value-badge {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--accent-blue);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 4px;
  text-align: center;
}

.level-parts-summary {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  padding: 4px 0;
}

/* Explorer Parts List */
.explorer-parts-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  overflow-y: auto;
  flex: 1;
  max-height: 300px;
  padding-right: 2px;
}

.explorer-parts-list:empty::before {
  content: 'Geen onderdelen geplaatst. Klik op Part Catalog om te plaatsen.';
  font-size: 11px;
  color: var(--text-dim);
  text-align: center;
  padding: 24px 12px;
  display: block;
  font-style: italic;
}

.explorer-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 8px 10px;
  cursor: pointer;
  transition: all 0.15s ease;
  gap: 8px;
}

.explorer-item:hover {
  background-color: var(--bg-hover);
  border-color: var(--accent-blue);
}

.explorer-item.selected {
  background-color: rgba(37, 99, 235, 0.2);
  border-color: var(--accent-blue);
  box-shadow: 0 0 8px rgba(56, 189, 248, 0.2);
}

.item-left {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
  flex: 1;
}

.part-color-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.item-details {
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow: hidden;
}

.item-name {
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.item-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.phase-tag {
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
}

.phase-tag.phase-1 {
  background: rgba(148, 163, 184, 0.2);
  color: #94a3b8;
}

.phase-tag.phase-2 {
  background: rgba(217, 119, 6, 0.2);
  color: #d97706;
}

.phase-tag.phase-3 {
  background: rgba(16, 185, 129, 0.2);
  color: #10b981;
}

.item-actions {
  display: flex;
  align-items: center;
  gap: 2px;
}

.btn-item-action {
  background: transparent;
  border: none;
  color: var(--text-dim);
  padding: 4px;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-item-action:hover {
  background-color: var(--bg-hover);
  color: #fff;
}

.btn-item-action.btn-vis.hidden {
  color: var(--text-dim);
  opacity: 0.4;
}

.btn-item-action.btn-vis.active {
  color: var(--accent-blue);
}

.btn-item-action.btn-del:hover {
  color: var(--accent-red);
}

/* Right Sidebar Tabs */
.sidebar-tabs-header {
  display: flex;
  background-color: var(--bg-input);
  border-bottom: 1px solid var(--border-color);
  padding: 4px;
  gap: 4px;
}

.sidebar-tab {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 8px 10px;
  font-size: 12px;
  font-weight: 500;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.sidebar-tab:hover {
  color: #fff;
}

.sidebar-tab.active {
  background-color: var(--bg-card);
  color: var(--accent-blue);
  font-weight: 600;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

.sidebar-tab-pane {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-header {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-bottom: 1px solid var(--border-color);
  padding: 12px 14px 8px 14px;
}

.header-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #fff;
}

.sidebar-header.compact {
  padding: 0 0 6px 0;
}

.sidebar-header h3 {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
}

.sub-caption {
  font-size: 11px;
  color: var(--text-dim);
}

/* Sidebar Cards */
.sidebar-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-main);
}

.plot-inputs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.input-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.input-field label {
  font-size: 11px;
  color: var(--text-muted);
}

.input-field input {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: #fff;
  border-radius: 4px;
  padding: 6px 8px;
  font-size: 12px;
  font-family: var(--font-mono);
  outline: none;
}

.input-field input:focus {
  border-color: var(--border-focus);
}

.plot-metrics-badge {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--bg-input);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 11px;
  color: var(--text-muted);
}

.plot-metrics-badge strong {
  color: var(--accent-blue);
  font-family: var(--font-mono);
}

/* Catalog Items */
.catalog-items-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.catalog-item-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.catalog-item-card:hover {
  border-color: var(--accent-blue);
  background-color: var(--bg-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.item-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.item-card-title {
  font-size: 12px;
  font-weight: 600;
  color: #fff;
}

.item-card-category {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  background-color: rgba(56, 189, 248, 0.1);
  color: var(--accent-blue);
}

.item-card-dims {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.item-card-preview {
  height: 48px;
  background-color: var(--bg-input);
  border-radius: 4px;
  border: 1px dashed var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.preview-box {
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: #fff;
  font-weight: 600;
}

/* ---------------- Center Viewport Host ---------------- */
#viewport-host {
  flex: 1;
  position: relative;
  background-color: #030712;
  display: flex;
  overflow: hidden;
}

.viewport-panel {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  transition: opacity 0.2s ease, width 0.2s ease, left 0.2s ease;
}

/* Viewport Modes (Smooth Opacity & Position Switching) */
#viewport-host.mode-2d #viewport-2d {
  opacity: 1;
  pointer-events: auto;
  z-index: 2;
  width: 100%;
  left: 0;
}
#viewport-host.mode-2d #viewport-3d {
  opacity: 0;
  pointer-events: none;
  z-index: 1;
  width: 100%;
  left: 0;
}

#viewport-host.mode-3d #viewport-2d {
  opacity: 0;
  pointer-events: none;
  z-index: 1;
  width: 100%;
  left: 0;
}
#viewport-host.mode-3d #viewport-3d {
  opacity: 1;
  pointer-events: auto;
  z-index: 2;
  width: 100%;
  left: 0;
}

#viewport-host.mode-split #viewport-2d {
  opacity: 1;
  pointer-events: auto;
  z-index: 2;
  width: 50%;
  left: 0;
  border-right: 2px solid var(--border-color);
}
#viewport-host.mode-split #viewport-3d {
  opacity: 1;
  pointer-events: auto;
  z-index: 2;
  width: 50%;
  left: 50%;
}

/* 2D Canvas */
#canvas-2d {
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
}

#canvas-2d:active {
  cursor: grabbing;
}

/* 3D Container */
#canvas-3d-container {
  width: 100%;
  height: 100%;
}

/* Viewport Overlays */
.canvas-2d-overlay, .canvas-3d-overlay {
  position: absolute;
  z-index: 10;
  display: flex;
  gap: 8px;
}

.canvas-2d-overlay.top-left {
  top: 14px;
  left: 14px;
  flex-direction: column;
}

.canvas-3d-overlay.top-right {
  top: 14px;
  right: 14px;
}

.north-compass {
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.4));
}

.zoom-controls {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.zoom-controls button {
  background: transparent;
  border: none;
  color: var(--text-main);
  padding: 8px 10px;
  font-size: 13px;
  font-weight: 600;
}

.zoom-controls button:hover {
  background-color: var(--bg-hover);
  color: var(--accent-blue);
}

.zoom-controls button + button {
  border-top: 1px solid var(--border-color);
}

.btn-tool {
  background-color: rgba(19, 27, 42, 0.85);
  backdrop-filter: blur(8px);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 500;
}

.btn-tool:hover {
  color: #fff;
  border-color: var(--accent-blue);
}

.btn-tool.active {
  background-color: rgba(37, 99, 235, 0.3);
  color: var(--accent-blue);
  border-color: var(--accent-blue);
}

/* ---------------- Right Sidebar: Inspector ---------------- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 30px 16px;
  color: var(--text-dim);
  gap: 12px;
}

.empty-state p {
  font-size: 12px;
  line-height: 1.5;
}

.section-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.phase-step-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 6px;
}

.phase-btn {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 8px 4px;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}

.phase-btn .phase-num {
  font-size: 12px;
  font-weight: 700;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: var(--bg-hover);
  display: flex;
  align-items: center;
  justify-content: center;
}

.phase-btn .phase-name {
  font-size: 10px;
}

.phase-btn.active {
  background-color: rgba(37, 99, 235, 0.2);
  border-color: var(--accent-primary);
  color: #fff;
}

.phase-btn.active .phase-num {
  background-color: var(--accent-primary);
  color: #fff;
}

.coords-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.coord-field {
  display: flex;
  align-items: center;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 4px 8px;
  gap: 4px;
  font-size: 12px;
  font-family: var(--font-mono);
}

.coord-field span {
  color: var(--text-dim);
}

.coord-field input {
  background: transparent;
  border: none;
  color: #fff;
  width: 100%;
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

.rotation-control-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.rotation-control-row input[type="range"] {
  flex: 1;
  accent-color: var(--accent-blue);
}

.rotation-control-row span {
  font-family: var(--font-mono);
  font-size: 12px;
  width: 36px;
  text-align: right;
  color: var(--accent-blue);
}

.quick-rot-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 4px;
}

.btn-rot {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 10px;
  padding: 5px 2px;
  font-family: var(--font-mono);
}
.btn-rot:hover {
  background-color: var(--bg-hover);
  color: #fff;
}

.section-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.badge-mini {
  font-size: 9px;
  font-weight: 600;
  padding: 1px 5px;
  border-radius: 3px;
  background-color: rgba(56, 189, 248, 0.15);
  color: var(--accent-blue);
  text-transform: uppercase;
}

.dim-chips {
  display: flex;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
}

.dim-chips span {
  background-color: var(--bg-input);
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
}

.setback-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  background-color: var(--bg-input);
  padding: 8px;
  border-radius: 6px;
  font-size: 11px;
}

.setback-item {
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
}

.setback-item strong {
  color: var(--accent-blue);
  font-family: var(--font-mono);
}

.color-picker-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.color-picker-row input[type="color"] {
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: 4px;
}

.palette-swatches {
  display: flex;
  gap: 6px;
}

.palette-swatches .swatch {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: transform 0.1s ease;
}

.palette-swatches .swatch:hover {
  transform: scale(1.15);
}

.item-actions-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 4px;
}

/* Analytics Card */
.analytics-card {
  margin-top: auto;
}

.metric-row {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
}

.metric-row strong {
  color: #fff;
  font-family: var(--font-mono);
}

.coverage-bar-track {
  width: 100%;
  height: 6px;
  background-color: var(--bg-input);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 4px;
}

.coverage-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #10b981, #38bdf8, #f59e0b);
  transition: width 0.3s ease;
}

/* ---------------- Bottom Status Bar ---------------- */
#status-bar {
  height: var(--status-h);
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  font-size: 11px;
  color: var(--text-dim);
  z-index: 100;
}

.status-left, .status-center, .status-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.status-badge.live::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-green);
  box-shadow: 0 0 6px var(--accent-green);
}

.status-coord {
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.hotkey-tip {
  color: var(--text-muted);
}

.hotkey-tip kbd {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 10px;
  font-family: var(--font-mono);
}

.docker-badge {
  background-color: rgba(14, 165, 233, 0.1);
  color: #38bdf8;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 500;
}

/* Modal Dialog */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-dialog {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  width: 440px;
  max-width: 90vw;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-size: 15px;
  color: #fff;
}

.btn-close {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 20px;
  cursor: pointer;
}
.btn-close:hover {
  color: #fff;
}

.modal-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.saved-list {
  max-height: 200px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.project-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
}

.project-item:hover {
  border-color: var(--accent-blue);
  background-color: var(--bg-hover);
}

.modal-divider {
  text-align: center;
  font-size: 11px;
  color: var(--text-dim);
  position: relative;
}

/* ---------------- Container Couplings & Support Grid ---------------- */
.couplings-action-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
  margin-top: 8px;
}

.btn-couple {
  display: flex;
  align-items: center;
  gap: 7px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 7px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: left;
}

.btn-couple:hover {
  background-color: rgba(56, 189, 248, 0.12);
  border-color: var(--accent-blue);
  color: #fff;
  transform: translateY(-1px);
}

.btn-couple:active {
  transform: translateY(0);
}

.btn-couple.btn-couple-fund {
  grid-column: span 2;
  background-color: rgba(148, 163, 184, 0.1);
  border-color: #64748b;
  justify-content: center;
}

.btn-couple.btn-couple-fund:hover {
  background-color: rgba(148, 163, 184, 0.2);
  border-color: #94a3b8;
}

.couple-icon {
  font-size: 13px;
  flex-shrink: 0;
}

.couple-txt {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------------- 3D Transform Gizmo Toolbar & Level Isolation Banner ---------------- */
.canvas-3d-overlay.top-left {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 10;
  display: flex;
  gap: 6px;
}

.gizmo-mode-strip {
  display: flex;
  gap: 4px;
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(8px);
  padding: 4px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.45);
}

.btn-gizmo {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 500;
  padding: 5px 9px;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  gap: 5px;
}

.btn-gizmo:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.btn-gizmo.active {
  background: rgba(56, 189, 248, 0.2);
  border-color: rgba(56, 189, 248, 0.5);
  color: #38bdf8;
  font-weight: 600;
}

.level-isolation-banner {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(56, 189, 248, 0.4);
  color: #e2e8f0;
  font-size: 12px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
  animation: fadeInDown 0.25s ease;
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translate(-50%, -8px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

.level-isolation-banner button {
  background: rgba(56, 189, 248, 0.2);
  border: 1px solid rgba(56, 189, 248, 0.4);
  color: #38bdf8;
  border-radius: 12px;
  padding: 2px 10px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.level-isolation-banner button:hover {
  background: #38bdf8;
  color: #0f172a;
}

/* Badge locked in inspector */
.badge.badge-locked {
  background-color: rgba(245, 158, 11, 0.18);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.4);
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 600;
}

.disabled-locked {
  opacity: 0.4 !important;
  cursor: not-allowed !important;
  pointer-events: none !important;
}