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

:root {
    /* Plasticity-inspired dark theme - Black UI */
    --bg-darkest: #000000;
    --bg-dark: #0a0a0a;
    --bg-medium: #141414;
    --bg-light: #1e1e1e;
    --bg-lighter: #2a2a2a;
    --border-color: #2a2a2a;
    --border-light: #3a3a3a;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-muted: #606060;
    --accent: #22c55e;
    --accent-hover: #22d3d8;
    --accent-active: #16a34a;
    --danger: #d64545;
    --danger-hover: #e55555;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-darkest);
    color: var(--text-primary);
    overflow: hidden;
}

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

/* Canvas Container */
#canvas-container {
    flex: 1;
    position: relative;
}

#canvas-container canvas {
    display: block;
}

/* Camera View Gizmo */
#camera-gizmo {
    position: absolute;
    top: 12px;
    right: 12px;
    display: flex;
    gap: 4px;
    z-index: 100;
}

/* Zoom Controls Gizmo */
#zoom-gizmo {
    position: absolute;
    top: 12px;
    right: 130px;
    display: flex;
    gap: 4px;
    z-index: 100;
}

#zoom-gizmo .gizmo-btn {
    font-size: 11px;
    font-weight: bold;
    min-width: 32px;
}

/* Edit Mode Gizmo */
#edit-mode-gizmo {
    position: absolute;
    top: 12px;
    left: 12px;
    display: flex;
    gap: 4px;
    z-index: 100;
}

/* Object Move Controls (floating on object) */
#object-move-controls {
    position: absolute;
    pointer-events: none;
    z-index: 100;
    width: 100px;
    height: 100px;
}

.obj-move-btn {
    position: absolute;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-dark);
    border: 1px solid var(--accent);
    border-radius: 50%;
    color: var(--accent);
    font-size: 0.9rem;
    cursor: pointer;
    pointer-events: auto;
    transition: all 0.15s;
    opacity: 0.9;
}

.obj-move-btn:hover {
    background: var(--accent);
    color: var(--bg-dark);
    opacity: 1;
    transform: scale(1.1);
}

#obj-move-forward {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
}

#obj-move-backward {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

#obj-move-left {
    left: 0;
    top: 50%;
    transform: translateY(-50%);
}

#obj-move-right {
    right: 0;
    top: 50%;
    transform: translateY(-50%);
}

/* Object Rotate Controls (floating on object) */
#object-rotate-controls {
    position: absolute;
    pointer-events: none;
    z-index: 100;
    width: 120px;
    height: 60px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px;
}

.obj-rotate-btn {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-dark);
    border: 1px solid #f59e0b;
    border-radius: 50%;
    color: #f59e0b;
    font-size: 0.85rem;
    cursor: pointer;
    pointer-events: auto;
    transition: all 0.15s;
    opacity: 0.9;
}

.obj-rotate-btn:hover {
    background: #f59e0b;
    color: var(--bg-dark);
    opacity: 1;
    transform: scale(1.1);
}

#crate-controls {
    position: absolute;
    pointer-events: none;
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.obj-detach-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-dark);
    border: 2px solid #10b981;
    border-radius: 50%;
    color: #10b981;
    font-size: 1rem;
    cursor: pointer;
    pointer-events: auto;
    transition: all 0.15s;
    opacity: 0.95;
    box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.obj-detach-btn:hover {
    background: #10b981;
    color: var(--bg-dark);
    opacity: 1;
    transform: scale(1.15);
}

.obj-snap-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-dark);
    border: 2px solid #3b82f6;
    border-radius: 50%;
    color: #3b82f6;
    font-size: 1rem;
    cursor: pointer;
    pointer-events: auto;
    transition: all 0.15s;
    opacity: 0.95;
    box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}

.obj-snap-btn:hover {
    background: #3b82f6;
    color: var(--bg-dark);
    opacity: 1;
    transform: scale(1.15);
}

.gizmo-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.15s;
    opacity: 0.8;
}

.gizmo-btn:hover {
    background: var(--bg-light);
    border-color: var(--accent);
    color: var(--accent);
    opacity: 1;
}

.gizmo-btn:active {
    background: var(--accent);
    color: white;
}

.gizmo-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
    opacity: 1;
}

/* UI Panel */
#ui-panel {
    width: 280px;
    background: var(--bg-dark);
    padding: 15px;
    overflow-y: auto;
    border-left: 1px solid var(--border-color);
}

#ui-panel h2 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    font-weight: 500;
}

/* Panel Sections */
.panel-section {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.panel-section h3 {
    font-size: 0.75rem;
    margin-bottom: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.panel-section h4 {
    font-size: 0.8rem;
    margin: 10px 0 5px 0;
    color: var(--text-secondary);
}

/* Input Row (for X, Y, Z inputs) */
.input-row {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
}

.input-col {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.input-col label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 3px;
    text-align: center;
}

.input-col input[type="number"] {
    width: 100%;
    padding: 5px 4px;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    background: var(--bg-medium);
    color: var(--text-primary);
    font-size: 0.8rem;
    text-align: center;
}

.input-col input[type="number"]:focus {
    outline: none;
    border-color: var(--accent);
}

/* Selected Section Headers */
#selected-section h4 {
    font-size: 0.75rem;
    color: var(--accent);
    margin: 12px 0 6px 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Dimension Controls */
#dimension-controls {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px dashed var(--border-color);
}

#dimension-controls h4 {
    color: var(--accent);
    margin-bottom: 8px;
}

/* Input Groups */
.input-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.input-group label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.input-group input[type="number"],
.input-group select {
    width: 80px;
    padding: 5px 8px;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    background: var(--bg-medium);
    color: var(--text-primary);
    font-size: 0.85rem;
}

.input-group input[type="number"]:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--accent);
}

.input-group span {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Selected Object Name */
.selected-object-name {
    flex: 1;
    margin-left: 10px;
    font-size: 0.85rem;
    color: var(--text-primary);
    word-break: break-word;
}

/* Hierarchy Edit Button */
.hierarchy-edit-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 2px 5px;
    font-size: 0.75rem;
    opacity: 0;
    transition: opacity 0.2s;
    margin-left: auto;
}

.hierarchy-item:hover .hierarchy-edit-btn {
    opacity: 1;
}

.hierarchy-edit-btn:hover {
    color: var(--accent);
}

/* Checkboxes */
.panel-section label {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 5px;
    cursor: pointer;
    color: var(--text-secondary);
}

.panel-section input[type="checkbox"] {
    margin-right: 8px;
    accent-color: var(--accent);
}

/* Object Hierarchy */
.panel-section h3 {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.hierarchy-count {
    background: var(--bg-lighter);
    color: var(--text-secondary);
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 10px;
    font-weight: normal;
}

.object-hierarchy {
    max-height: 200px;
    overflow-y: auto;
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.hierarchy-empty {
    padding: 15px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-style: italic;
}

.hierarchy-item {
    display: flex;
    align-items: center;
    padding: 6px 8px;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-secondary);
    transition: background 0.1s;
}

.hierarchy-item:last-child {
    border-bottom: none;
}

.hierarchy-item:hover {
    background: var(--bg-lighter);
}

.hierarchy-item.selected {
    background: var(--accent);
    color: white;
}

.hierarchy-item.selected .hierarchy-icon {
    color: white;
}

.hierarchy-icon {
    margin-right: 8px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.hierarchy-name {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.hierarchy-group {
    margin-left: 0;
}

.hierarchy-group > .hierarchy-item {
    font-weight: 500;
}

.hierarchy-children {
    margin-left: 16px;
}

.hierarchy-children .hierarchy-item {
    padding-left: 8px;
    border-left: 1px solid var(--border-color);
}

.hierarchy-children .hierarchy-item .hierarchy-name {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.hierarchy-toggle {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 4px;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.7rem;
}

.hierarchy-toggle:hover {
    color: var(--text-primary);
}

/* Wall Toggles */
.wall-toggles {
    margin-top: 10px;
    padding: 10px;
    background: var(--bg-medium);
    border-radius: 3px;
}

.wall-toggles label {
    display: inline-block;
    width: 48%;
    margin-bottom: 5px;
}

/* Buttons */
.btn {
    display: block;
    width: 100%;
    padding: 8px 12px;
    margin-top: 8px;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.15s;
    background: var(--bg-light);
    color: var(--text-primary);
}

.btn:hover {
    background: var(--bg-lighter);
    border-color: var(--border-light);
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

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

.btn-danger:hover {
    background: var(--danger-hover);
    border-color: var(--danger-hover);
}

.btn-supporting {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    color: white;
}

.btn-supporting:hover {
    opacity: 0.85;
}

/* Button Group */
.btn-group {
    display: flex;
    gap: 4px;
}

.btn-small {
    flex: 1;
    padding: 6px 8px;
    font-size: 0.8rem;
    margin-top: 0;
}

.btn-small.active,
.btn.btn-small.active {
    background: var(--accent) !important;
    border-color: var(--accent) !important;
    color: white !important;
}

/* Mode buttons with icons */
.mode-buttons .btn-small {
    padding: 8px 10px;
    font-size: 1.1rem;
}

.mode-buttons .btn-small i {
    display: block;
}

/* Object Library Grid */
.object-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
}

.object-btn {
    padding: 10px 6px;
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    color: var(--text-secondary);
    font-size: 0.7rem;
    cursor: pointer;
    text-align: center;
    transition: all 0.15s;
}

.object-btn:hover {
    border-color: var(--accent);
    background: var(--bg-light);
    color: var(--text-primary);
}

.object-btn.active {
    border-color: var(--accent);
    background: var(--accent);
    color: white;
}

.object-btn .icon {
    display: block;
    font-size: 1.4rem;
    margin-bottom: 3px;
}

/* Object Library disabled state (when in transform mode) */
.object-grid.disabled {
    opacity: 0.4;
    pointer-events: none;
}

.object-grid.disabled .object-btn {
    cursor: not-allowed;
}

/* Selected Section */
#selected-section {
    background: var(--bg-medium);
    margin: -15px;
    margin-bottom: 20px;
    padding: 15px;
    border-radius: 3px;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-medium);
}

.modal-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 16px;
}

.shortcut-section {
    margin-bottom: 16px;
}

.shortcut-section:last-child {
    margin-bottom: 0;
}

.shortcut-section h4 {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin: 0 0 8px 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

#shortcut-preset-name {
    text-transform: none;
}

.shortcut-section ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.shortcut-section li {
    padding: 5px 0;
    color: var(--text-secondary);
    font-size: 0.85rem;
    border-bottom: 1px solid var(--border-color);
}

.shortcut-section li:last-child {
    border-bottom: none;
}

.shortcut-section kbd {
    display: inline-block;
    padding: 2px 6px;
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    font-family: monospace;
    font-size: 0.8rem;
    color: var(--accent);
    margin-right: 5px;
}

.shortcut-section strong {
    color: var(--accent);
}

/* Room Info Display */
.room-info {
    margin-top: 10px;
    padding: 8px 12px;
    background: var(--bg-medium);
    border-radius: 3px;
    text-align: center;
}

#room-dimensions {
    color: var(--accent);
    font-weight: 500;
    font-size: 0.9rem;
}

/* Preset Grid */
.preset-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.preset-btn {
    padding: 10px;
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    cursor: pointer;
    text-align: center;
    transition: all 0.15s;
}

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

.preset-btn.active {
    border-color: var(--accent);
    background: var(--accent);
}

.preset-btn.active .preset-name {
    color: var(--bg-dark);
}

.preset-btn.active .preset-size {
    color: var(--bg-medium);
}

.preset-btn .preset-name {
    display: block;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.85rem;
    margin-bottom: 3px;
}

.preset-btn .preset-size {
    display: block;
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Wall Toggles Grid */
.wall-toggles-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.wall-toggles-grid label {
    display: flex;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
}

.wall-toggles-grid input[type="checkbox"] {
    margin-right: 8px;
    accent-color: var(--accent);
}

/* Modal Actions */
.modal-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.modal-actions .btn {
    flex: 1;
}

/* Radio Labels */
.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    padding: 6px 12px;
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    transition: all 0.15s;
}

.radio-label:hover {
    border-color: var(--accent);
}

.radio-label input[type="radio"] {
    accent-color: var(--accent);
}

/* Rack Rows List */
.rack-rows-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 200px;
    overflow-y: auto;
}

.rack-row-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    border-radius: 3px;
}

.rack-row-item .row-number {
    font-weight: 600;
    color: var(--accent);
    min-width: 60px;
}

.rack-row-item .row-config {
    flex: 1;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.rack-row-item .row-config input,
.rack-row-item .row-config select {
    width: 70px;
    padding: 4px 6px;
    font-size: 0.8rem;
}

.rack-row-item .row-config label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.rack-row-item .btn-remove-row {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px 8px;
    font-size: 1.2rem;
}

.rack-row-item .btn-remove-row:hover {
    color: #ef4444;
}

.empty-rows-message {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: center;
    padding: 20px;
}

/* Color Input Group */
.color-input-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    padding: 8px 10px;
    background: var(--bg-medium);
    border-radius: 3px;
}

.color-input-group label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.color-input-group input[type="color"] {
    width: 50px;
    height: 28px;
    padding: 0;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    background: var(--bg-light);
    cursor: pointer;
}

.color-input-group input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 2px;
}

.color-input-group input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 2px;
}

/* Floor Grid Info */
.floor-grid-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 10px;
    background: var(--bg-dark);
    border-radius: 4px;
    margin-bottom: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.floor-grid-info span {
    color: var(--text-primary);
}

#floor-tile-size-display {
    color: var(--accent-color);
    font-weight: 500;
}

/* Color Swatches */
.color-swatches {
    display: flex;
    gap: 6px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.color-swatch {
    width: 32px;
    height: 32px;
    border: 2px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s;
    padding: 0;
}

.color-swatch:hover {
    transform: scale(1.1);
    border-color: rgba(255,255,255,0.3);
}

.color-swatch.active {
    border-color: white;
    box-shadow: 0 0 0 2px var(--bg-dark), 0 0 0 4px white;
}

.color-swatch-picker {
    width: 32px;
    height: 32px;
    padding: 0;
    border: 2px dashed var(--border-light);
    border-radius: 4px;
    background: var(--bg-medium);
    cursor: pointer;
}

.color-swatch-picker::-webkit-color-swatch-wrapper {
    padding: 2px;
}

.color-swatch-picker::-webkit-color-swatch {
    border: none;
    border-radius: 2px;
}

/* Preference Input Group */
.pref-input-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    padding: 8px 10px;
    background: var(--bg-medium);
    border-radius: 3px;
}

.pref-input-group label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.pref-input-group select {
    width: 120px;
    padding: 5px 8px;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    background: var(--bg-light);
    color: var(--text-primary);
    font-size: 0.85rem;
}

.pref-input-group select:focus {
    outline: none;
    border-color: var(--accent);
}

.pref-input-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
    cursor: pointer;
}

/* Scrollbar */
#ui-panel::-webkit-scrollbar {
    width: 6px;
}

#ui-panel::-webkit-scrollbar-track {
    background: var(--bg-darkest);
}

#ui-panel::-webkit-scrollbar-thumb {
    background: var(--bg-lighter);
    border-radius: 3px;
}

#ui-panel::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* Placement Mode Indicator */
.placement-mode #canvas-container {
    cursor: crosshair;
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 10px 20px;
    background: var(--bg-medium);
    border: 1px solid var(--accent);
    border-radius: 3px;
    color: var(--text-primary);
    font-size: 0.85rem;
    z-index: 1000;
    animation: fadeInOut 3s ease;
}

@keyframes fadeInOut {
    0% { opacity: 0; transform: translateX(-50%) translateY(20px); }
    10% { opacity: 1; transform: translateX(-50%) translateY(0); }
    90% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(-20px); }
}

/* Custom Objects List */
.custom-objects-list,
.builtin-objects-list {
    max-height: 200px;
    overflow-y: auto;
    background: var(--bg-medium);
    border-radius: 4px;
    padding: 8px;
}

.custom-objects-list .empty-message {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: center;
    padding: 10px;
}

.custom-object-item,
.builtin-object-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px;
    margin-bottom: 4px;
    background: var(--bg-light);
    border-radius: 3px;
}

.custom-object-item:last-child,
.builtin-object-item:last-child {
    margin-bottom: 0;
}

.custom-object-item .obj-info,
.builtin-object-item .obj-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.custom-object-item .obj-icon,
.builtin-object-item .obj-icon {
    font-size: 1.2rem;
}

.custom-object-item .obj-name,
.builtin-object-item .obj-name {
    font-size: 0.85rem;
    color: var(--text-primary);
}

.custom-object-item .obj-dims {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.custom-object-item .btn-delete-obj {
    background: transparent;
    border: none;
    color: var(--danger);
    cursor: pointer;
    padding: 4px 8px;
    font-size: 1rem;
}

.custom-object-item .btn-delete-obj:hover {
    color: var(--danger-hover);
}

.builtin-object-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
}

/* Responsive */
@media (max-width: 768px) {
    #ui-panel {
        width: 240px;
        font-size: 0.9rem;
    }
}