/* ============================================================================
   WildDet3D-Bench Visualization - Professional Dark Theme
   ============================================================================ */

:root {
    /* Colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-hover: #475569;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent-primary: #3b82f6;
    --accent-hover: #2563eb;
    
    /* Dataset Badge Colors */
    --badge-coco: #3b82f6;
    --badge-lvis: #8b5cf6;
    --badge-v3det: #22c55e;
    --badge-obj365: #f97316;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
}

/* ============================================================================
   Reset & Base
   ============================================================================ */

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

html, body {
    height: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-hover);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ============================================================================
   App Container
   ============================================================================ */

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ============================================================================
   Header
   ============================================================================ */

.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--bg-tertiary);
    padding: var(--spacing-md) var(--spacing-lg);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1800px;
    margin: 0 auto;
}

.header-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.header-stats {
    display: flex;
    gap: var(--spacing-xl);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-primary);
}

.stat-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Back Link (Detail Page) */
.back-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.back-link:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.image-info {
    flex: 1;
    margin-left: var(--spacing-lg);
}

.image-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xs);
}

.meta-item {
    color: var(--text-secondary);
    font-size: 13px;
}

/* ============================================================================
   Main Layout
   ============================================================================ */

.main-layout {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* ============================================================================
   Sidebar
   ============================================================================ */

.sidebar {
    width: 320px;
    min-width: 320px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--bg-tertiary);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: width var(--transition-normal), min-width var(--transition-normal), opacity var(--transition-normal);
}

.sidebar.collapsed {
    width: 0;
    min-width: 0;
    border-right: none;
    overflow: hidden;
}

/* ">" button fixed on left edge when sidebar is collapsed */
.sidebar-open-btn {
    position: fixed;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 200;
    width: 24px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--text-muted);
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-left: none;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.sidebar-open-btn:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.sidebar-open-btn.hidden {
    display: none;
}

/* "<" button inside sidebar header */
.sidebar-close-btn {
    padding: 2px 8px;
    font-size: 18px;
    color: var(--text-muted);
    background: none;
    border: 1px solid var(--bg-tertiary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.sidebar-close-btn:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--bg-tertiary);
}

.sidebar-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}


.tree-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

/* ============================================================================
   Scene Tree
   ============================================================================ */

.tree-node {
    user-select: none;
}

.tree-node-header {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.tree-node-header:hover {
    background: var(--bg-tertiary);
}

.tree-node-header.selected {
    background: var(--accent-primary);
}

.tree-node-header.selected .tree-node-name,
.tree-node-header.selected .tree-node-count {
    color: white;
}

.tree-toggle {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: transform var(--transition-fast);
}

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

.tree-toggle.empty {
    visibility: hidden;
}

.tree-node-name {
    flex: 1;
    font-size: 13px;
    color: var(--text-primary);
    margin-left: var(--spacing-xs);
}

.tree-node-count {
    font-size: 11px;
    color: var(--text-muted);
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: 10px;
}

.tree-children {
    margin-left: var(--spacing-lg);
    display: none;
}

.tree-children.expanded {
    display: block;
}

/* ============================================================================
   Content Area
   ============================================================================ */

.content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: var(--spacing-lg);
}

.content-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.content-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.content-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* Search Box */
.search-box {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
}

.search-box svg {
    color: var(--text-muted);
}

.search-box input {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 13px;
    width: 180px;
    outline: none;
}

.search-box input::placeholder {
    color: var(--text-muted);
}

/* Filter Buttons */
.filter-buttons {
    display: flex;
    gap: var(--spacing-xs);
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

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

.shuffle-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    margin-left: var(--spacing-sm);
}

.shuffle-btn:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

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

/* ============================================================================
   Image Grid
   ============================================================================ */

.image-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    overflow-y: auto;
    padding-right: var(--spacing-sm);
}

.image-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 1px solid transparent;
}

.image-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.image-card-thumb {
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: var(--bg-tertiary);
}

.image-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-card-info {
    padding: var(--spacing-md);
}

.image-card-id {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.image-card-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 2px 8px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: var(--radius-sm);
    color: white;
}

.badge-coco { background: var(--badge-coco); }
.badge-lvis { background: var(--badge-lvis); }
.badge-v3det { background: var(--badge-v3det); }
.badge-obj365 { background: var(--badge-obj365); }

.annotation-count {
    font-size: 11px;
    color: var(--text-muted);
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

/* ============================================================================
   Pagination
   ============================================================================ */

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg) 0;
}

.pagination-btn {
    min-width: 36px;
    height: 36px;
    padding: 0 var(--spacing-md);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

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

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

/* ============================================================================
   Detail Page
   ============================================================================ */

.detail-page .header-content {
    justify-content: flex-start;
}

.detail-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.detail-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.section-header {
    margin-bottom: var(--spacing-lg);
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: var(--spacing-sm);
}

.section-header .section-title {
    margin-right: auto;
}

.section-header .section-desc {
    width: 100%;
}

.combined-dl-btn,
.toggle-labels-btn {
    padding: 4px 12px;
    font-size: 13px;
}

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

.section-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.section-desc {
    font-size: 13px;
    color: var(--text-muted);
}

/* ============================================================================
   Visualization Grid
   ============================================================================ */

.viz-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    max-width: 900px;
    margin: 0 auto;
}

.viz-grid .viz-3d {
    grid-column: span 2;
}

.viz-panel {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.viz-title-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-tertiary);
    padding: 0 var(--spacing-sm) 0 0;
}

.viz-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: var(--spacing-sm) var(--spacing-md);
}

.download-btn {
    background: none;
    border: 1px solid var(--text-muted);
    color: var(--text-secondary);
    border-radius: 4px;
    padding: 2px 8px;
    font-size: 12px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.15s;
}

.download-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

.download-btn.recording {
    background: #ef4444;
    color: white;
    border-color: #ef4444;
}

.viz-container {
    position: relative;
    aspect-ratio: 4 / 3;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.viz-container canvas {
    /* Don't use width/height: 100% - let JavaScript set canvas size to match image aspect ratio */
    /* The canvas dimensions are set by overlay-renderer.js resizeCanvas() */
    display: block;
    max-width: 100%;
    max-height: 100%;
    margin: auto;
}

.threejs-container {
    width: 100%;
    height: 100%;
    position: relative;
}

/* Reset button for 3D viewer */
.viewer-reset-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 6px 12px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    z-index: 100;
    transition: background 0.2s, transform 0.1s;
}

.viewer-reset-btn:hover {
    background: rgba(0, 0, 0, 0.85);
    transform: scale(1.02);
}

.viewer-reset-btn:active {
    transform: scale(0.98);
}

/* Controls hint for 3D viewer */
.viewer-controls-hint {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    font-size: 11px;
    color: var(--text-tertiary);
}

.viewer-controls-hint span {
    white-space: nowrap;
}

/* ============================================================================
   Loading State
   ============================================================================ */

/* ============================================================================
   Annotation List
   ============================================================================ */

.annotation-list {
    margin-top: var(--spacing-lg);
    border-top: 1px solid var(--bg-tertiary);
    padding-top: var(--spacing-lg);
}

.annotation-list-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.annotation-list-items {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.annotation-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 4px 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    transition: all var(--transition-fast);
}

.annotation-item.hidden {
    opacity: 0.4;
}

.annotation-item-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
    flex-shrink: 0;
}

.annotation-item input[type="checkbox"] {
    margin: 0;
    cursor: pointer;
}

.annotation-item-name {
    background: none;
    border: 1px solid transparent;
    color: var(--text-primary);
    font-size: 12px;
    font-family: inherit;
    padding: 2px 4px;
    border-radius: var(--radius-sm);
    min-width: 60px;
    max-width: 160px;
}

.annotation-item-name:hover {
    border-color: var(--bg-hover);
}

.annotation-item-name:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: var(--bg-primary);
}

/* ============================================================================
   Loading State
   ============================================================================ */

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
    font-size: 13px;
    grid-column: 1 / -1;
}

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

@media (max-width: 1200px) {
    .viz-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 900px) {
    .main-layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        min-width: auto;
        max-height: 300px;
    }

    .image-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .viz-grid {
        grid-template-columns: 1fr;
    }
    
    .viz-panel.viz-3d {
        grid-column: span 1;
    }
}

@media (max-width: 600px) {
    .header-stats {
        display: none;
    }
    
    .content-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-buttons {
        flex-wrap: wrap;
    }
}