/* ============================================================================
   3D Detection Comparison - Professional Dark Theme
   ============================================================================ */

:root {
    /* Background Colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-hover: #475569;

    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #e2e8f0;
    --text-muted: #94a3b8;
    --text-dim: #64748b;

    /* Accent */
    --accent-primary: #3b82f6;
    --accent-hover: #2563eb;

    /* Model Colors */
    --color-sam3-3d: #e74c3c;
    --color-gdino3d: #3b82f6;
    --color-detany3d: #22c55e;
    --color-ovmono3d: #f97316;
    --color-gt: #a855f7;

    /* Dataset Badge Colors */
    --badge-coco-val: #3b82f6;
    --badge-coco-train: #8b5cf6;
    --badge-obj365-val: #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-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

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

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

.sidebar {
    width: 280px;
    min-width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--bg-tertiary);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.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);
}

.btn-collapse-all {
    padding: var(--spacing-xs);
    color: var(--text-dim);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

.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-dim);
    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-dim);
    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-dim);
    flex-shrink: 0;
}

.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-dim);
}

/* 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-muted);
    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);
}

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

.image-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    overflow-y: auto;
    padding-right: var(--spacing-sm);
    align-content: start;
}

.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);
}

.card-thumb {
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-thumb img,
.card-thumb canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
}

.card-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
}

.card-id {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-models {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0 var(--spacing-md) var(--spacing-sm);
    flex-wrap: wrap;
}

/* 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-val { background: var(--badge-coco-val); }
.badge-coco-train { background: var(--badge-coco-train); }
.badge-obj365-val { background: var(--badge-obj365-val); }

/* Model Count Pills */
.model-pill {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    padding: 2px 6px;
    font-size: 10px;
    font-weight: 600;
    color: white;
    border-radius: var(--radius-sm);
    opacity: 0.9;
}

.model-pill-sam3-3d { background: var(--color-sam3-3d); }
.model-pill-gdino3d { background: var(--color-gdino3d); }
.model-pill-detany3d { background: var(--color-detany3d); }
.model-pill-ovmono3d { background: var(--color-ovmono3d); }
.model-pill-gt { background: var(--color-gt); }

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

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

.pagination-btn {
    min-width: 36px;
    height: 36px;
    padding: 0 var(--spacing-md);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    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;
}

.pagination-info {
    font-size: 13px;
    color: var(--text-dim);
    margin: 0 var(--spacing-sm);
}

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

.detail-page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

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

.detail-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
}

/* Back Link */
.header-spacer {
    width: 100px;
    flex-shrink: 0;
}

.back-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-muted);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

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

.image-info {
    flex: 1;
    margin-left: var(--spacing-md);
    min-width: 0;
}

.image-info h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

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

/* Nav Buttons */
.nav-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

.nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-btn svg {
    flex-shrink: 0;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.nav-btn:hover:not(:disabled) {
    color: var(--text-primary);
    background: var(--bg-hover);
    border-color: rgba(255, 255, 255, 0.15);
}

.nav-btn:hover:not(:disabled) svg {
    opacity: 1;
}

.nav-btn:active:not(:disabled) {
    transform: scale(0.97);
}

.nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* ============================================================================
   Disclaimer Banner
   ============================================================================ */

.disclaimer {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-md);
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.disclaimer svg {
    flex-shrink: 0;
    margin-top: 2px;
    color: #3b82f6;
}

/* ============================================================================
   Controls Bar
   ============================================================================ */

.controls-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--bg-tertiary);
    flex-wrap: wrap;
}

/* BEV Elevation Slider */
.bev-elev-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.bev-elev-group .control-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
    white-space: nowrap;
}

.bev-elev-group input[type="range"] {
    width: 100px;
    height: 6px;
    appearance: none;
    -webkit-appearance: none;
    background: var(--bg-primary);
    border-radius: 3px;
    outline: none;
}

.bev-elev-group input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
}

.bev-elev-group input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--accent-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

.elev-display {
    font-size: 13px;
    font-weight: 600;
    color: var(--accent-primary);
    min-width: 24px;
}

.elev-display::after {
    content: '\00b0';
}

/* Score Slider */
.score-slider {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.score-slider label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    white-space: nowrap;
}

.score-slider input[type="range"] {
    width: 160px;
    height: 6px;
    appearance: none;
    -webkit-appearance: none;
    background: var(--bg-primary);
    border-radius: 3px;
    outline: none;
}

.score-slider input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.score-slider input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.score-slider input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--accent-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

.score-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent-primary);
    min-width: 40px;
    text-align: center;
}

/* Toggle Checkboxes */
.toggle-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.toggle-checkbox {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

.toggle-checkbox input[type="checkbox"] {
    accent-color: var(--accent-primary);
    cursor: pointer;
}

/* Model Toggles */
.model-toggles {
    display: flex;
    gap: var(--spacing-sm);
    margin-left: auto;
}

.model-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
    background: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.model-toggle:hover {
    background: var(--bg-hover);
}

.toggle-indicator {
    width: 10px;
    height: 10px;
    border-radius: 2px;
    background: var(--bg-hover);
    transition: background var(--transition-fast);
}

.model-toggle.active .toggle-indicator {
    background: currentColor;
}

.model-toggle.active {
    border-color: currentColor;
}

.model-toggle[data-model="sam3_3d"] { color: var(--color-sam3-3d); }
.model-toggle[data-model="gdino3d"] { color: var(--color-gdino3d); }
.model-toggle[data-model="detany3d"] { color: var(--color-detany3d); }
.model-toggle[data-model="ovmono3d"] { color: var(--color-ovmono3d); }
.model-toggle[data-model="gt"] { color: var(--color-gt); }

/* ============================================================================
   Comparison Grid (Detail Page)
   ============================================================================ */

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

/* Layout: GT full-width row, then 2x2 model grid */
.comparison-layout {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    flex: 1;
    overflow-y: auto;
}

/* GT card spans full width */
.gt-card {
    display: flex;
    flex-direction: column;
}

/* 2x2 grid for GT 3D + 3 model cards */
.models-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

/* GT 2D prompt card (full width, no BEV) */
.gt-prompt-card .canvas-wrap {
    aspect-ratio: 16 / 7;
}

/* Featured card (WildDet3D) */
.model-card.featured {
    border: 2px solid #e74c3c;
    box-shadow: 0 0 16px rgba(231, 76, 60, 0.25),
                inset 0 0 0 1px rgba(231, 76, 60, 0.1);
}

.model-card.featured .model-card-header {
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.15), var(--bg-tertiary));
}

/* Model Card (used by GT, model panels, and BEV) */
.model-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--bg-tertiary);
}

.model-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
}

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

.model-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.det-count {
    font-size: 11px;
    color: var(--text-dim);
    margin-left: auto;
    background: var(--bg-primary);
    padding: 2px 8px;
    border-radius: 10px;
}

.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    margin-left: var(--spacing-sm);
    color: var(--text-dim);
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

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

/* Dual canvas: overlay (left) + BEV (right) side by side */
.dual-canvas {
    display: flex;
    gap: 2px;
}

.dual-canvas .canvas-wrap {
    flex: 1;
    min-width: 0;
    position: relative;
    aspect-ratio: 4 / 3;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.dual-canvas .bev-wrap {
    background: #f8f8f8;
}

.model-card canvas {
    display: block;
    max-width: 100%;
    max-height: 100%;
    margin: auto;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-dim);
    font-size: 13px;
    font-style: italic;
}

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

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

.loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--bg-tertiary);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-right: var(--spacing-sm);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============================================================================
   Scrollbar Styling
   ============================================================================ */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--bg-hover);
}

/* ============================================================================
   Responsive - Desktop (default: sidebar 280px + content, grid 4 cols)
   ============================================================================ */

@media (max-width: 1400px) {
    .image-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 1200px) {
    .image-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 900px) {
    .image-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .main-layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        min-width: auto;
        max-height: 250px;
        border-right: none;
        border-bottom: 1px solid var(--bg-tertiary);
    }

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

    .dual-canvas {
        flex-direction: column;
    }

    .controls-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .model-toggles {
        margin-left: 0;
        flex-wrap: wrap;
    }

    .header-stats {
        display: none;
    }

    .nav-buttons {
        display: none;
    }
}

@media (max-width: 480px) {
    .image-grid {
        grid-template-columns: 1fr;
    }

    .content-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-buttons {
        flex-wrap: wrap;
    }

    .search-box input {
        width: 100%;
    }
}