/* ═══════════ Side Panels ═══════════ */
.panel {
    width: var(--panel-width);
    min-width: var(--panel-width);
    background: var(--bg-dark);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#right-panel {
    border-right: none;
    border-left: 1px solid var(--border-color);
}

.panel-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-darker);
}

.panel-tab {
    flex: 1;
    padding: 8px 4px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.panel-tab:hover {
    color: var(--text-secondary);
}

.panel-tab.active {
    color: var(--text-primary);
    border-bottom-color: var(--accent-primary);
}

.panel-content {
    display: none;
    flex: 1;
    overflow-y: auto;
}

.panel-content.active {
    display: block;
}

.panel-header {
    padding: 8px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-darker);
}

.small-btn {
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition-fast);
}

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

/* ═══════════ Scene Tree ═══════════ */
.scene-tree {
    padding: 4px;
}

.tree-item {
    display: flex;
    align-items: center;
    padding: 5px 8px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    gap: 6px;
    margin: 1px 0;
}

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

.tree-item.selected {
    background: rgba(108,92,231,0.2);
    color: var(--accent-primary);
}

.tree-item-icon {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.tree-item-name {
    font-size: 12px;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tree-item-actions {
    display: none;
    gap: 2px;
}

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

.tree-action {
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 2px;
    font-size: 10px;
}

.tree-action:hover {
    background: var(--bg-lighter);
    color: var(--text-primary);
}

/* ═══════════ Component Library ═══════════ */
.component-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
    padding: 8px;
}

.component-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 10px 4px;
    background: var(--bg-medium);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
}

.component-item:hover {
    border-color: var(--accent-primary);
    background: var(--bg-hover);
    box-shadow: 0 0 8px rgba(108,92,231,0.2);
}

.component-icon {
    font-size: 20px;
    color: var(--accent-secondary);
}

.component-item span {
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ═══════════ Properties Panel ═══════════ */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    gap: 12px;
}

.empty-state p {
    color: var(--text-muted);
    font-size: 12px;
    text-align: center;
}

.prop-section {
    border-bottom: 1px solid var(--border-color);
}

.prop-section-header {
    padding: 8px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    background: var(--bg-darker);
}

.prop-row {
    padding: 5px 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.prop-row label {
    font-size: 11px;
    color: var(--text-muted);
    min-width: 70px;
    flex-shrink: 0;
}

.prop-row.triple {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
}

.prop-row.triple label {
    margin-bottom: 0;
}

.triple-inputs {
    display: flex;
    gap: 4px;
    width: 100%;
}

.axis-input {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 0;
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.axis-label {
    padding: 4px 6px;
    font-size: 10px;
    font-weight: 700;
    color: white;
    min-width: 20px;
    text-align: center;
}

.axis-label.x { background: var(--axis-x); }
.axis-label.y { background: var(--axis-y); color: #111; }
.axis-label.z { background: var(--axis-z); }

.axis-input input {
    flex: 1;
    width: 100%;
    padding: 4px 4px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    outline: none;
    font-size: 11px;
    min-width: 0;
}

.prop-input {
    flex: 1;
    padding: 5px 8px;
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    outline: none;
    transition: var(--transition-fast);
}

.prop-input:focus {
    border-color: var(--accent-primary);
}

.prop-select {
    flex: 1;
    padding: 5px 8px;
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    outline: none;
    cursor: pointer;
}

.prop-select option {
    background: var(--bg-medium);
}

.prop-slider {
    flex: 1;
    -webkit-appearance: none;
    height: 4px;
    background: var(--bg-lighter);
    border-radius: 2px;
    outline: none;
}

.prop-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    border: 2px solid var(--bg-dark);
    box-shadow: 0 0 4px rgba(108,92,231,0.4);
}

.color-picker {
    width: 36px;
    height: 28px;
    padding: 1px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-darker);
    cursor: pointer;
}

input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent-primary);
    cursor: pointer;
}

/* ═══════════ Material Presets ═══════════ */
.material-presets {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    padding: 8px 12px;
}

.mat-preset {
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--radius-sm);
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.mat-preset:hover {
    border-color: var(--accent-primary);
    transform: scale(1.05);
}

.mat-preset-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    font-size: 8px;
    text-align: center;
    background: rgba(0,0,0,0.7);
    color: var(--text-secondary);
    padding: 2px;
    text-transform: uppercase;
}