/* ============================================
   Keycap 3D Viewer - Stylesheet
   Dark CAD-style theme
   ============================================ */

:root {
    /* Colors */
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --accent-primary: #00d9ff;
    --accent-secondary: #7b2cbf;
    --accent-success: #00ff88;
    --accent-warning: #ffaa00;
    --accent-danger: #ff4757;
    --text-primary: #e8e8e8;
    --text-secondary: #a0a0a0;
    --text-muted: #666;
    --border-color: #2d3a4a;

    /* Axis colors */
    --axis-x: #ff4444;
    --axis-y: #44ff44;
    --axis-z: #4488ff;

    /* 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: 0.15s ease;
    --transition-normal: 0.3s ease;
}

/* ============================================
   Reset & Base
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Noto Sans TC', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
}

/* ============================================
   App Container Layout
   ============================================ */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.app-header {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.app-header .subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

/* ============================================
   Side Panels
   ============================================ */
.left-panel,
.right-panel {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

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

.panel-section {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.panel-section h2 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ============================================
   Upload Zones
   ============================================ */
.upload-zone {
    background: var(--bg-primary);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-bottom: var(--spacing-md);
}

.upload-zone:hover {
    border-color: var(--accent-primary);
    background: rgba(0, 217, 255, 0.05);
}

.upload-zone.drag-over {
    border-color: var(--accent-success);
    background: rgba(0, 255, 136, 0.1);
    transform: scale(1.02);
}

.upload-zone.loaded {
    border-color: var(--accent-success);
    border-style: solid;
}

.upload-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.upload-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.upload-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.file-status {
    display: block;
    margin-top: var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
}

.file-status.loaded {
    color: var(--accent-success);
}

/* ============================================
   Feature & Surface Lists
   ============================================ */
.feature-list,
.surface-list,
.all-features-list {
    max-height: 250px;
    overflow-y: auto;
}

.empty-state {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-style: italic;
    text-align: center;
    padding: var(--spacing-md);
}

/* Filter Bar */
.filter-bar {
    margin-bottom: var(--spacing-sm);
}

.filter-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.85rem;
    transition: all var(--transition-fast);
}

.filter-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(0, 217, 255, 0.2);
}

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

/* Badge */
.badge {
    background: var(--accent-primary);
    color: var(--bg-primary);
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
    margin-left: var(--spacing-sm);
}

.feature-item,
.surface-item {
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
}

.feature-item:hover,
.surface-item:hover {
    background: var(--bg-tertiary);
}

.feature-item.active {
    border-left-color: var(--accent-primary);
    background: var(--bg-tertiary);
}

.feature-name {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--accent-primary);
}

.feature-id {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.surface-coords {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-family: 'Monaco', 'Consolas', monospace;
}

/* Surface Type Colors */
.feature-item.type-cut {
    border-left-color: #ff6b6b;
}

.feature-item.type-chamfer {
    border-left-color: #ffa502;
}

.feature-item.type-datum {
    border-left-color: #7bed9f;
}

.feature-item.type-surface {
    border-left-color: #70a1ff;
}

.feature-item.type-protrusion {
    border-left-color: #a55eea;
}

/* Surface Detail Panel */
.surface-detail {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.surface-detail .detail-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.surface-detail .detail-title {
    font-weight: 700;
    font-size: 1rem;
    color: var(--accent-primary);
}

.surface-detail .detail-type {
    font-size: 0.75rem;
    padding: 2px 8px;
    background: var(--accent-secondary);
    color: white;
    border-radius: var(--radius-sm);
}

.surface-detail .detail-section {
    margin-bottom: var(--spacing-md);
}

.surface-detail .detail-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: var(--spacing-xs);
}

.surface-detail .detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) 0;
    font-size: 0.85rem;
}

.surface-detail .detail-label {
    color: var(--text-secondary);
}

.surface-detail .detail-value {
    font-family: 'Monaco', 'Consolas', monospace;
    color: var(--accent-primary);
    font-weight: 600;
}

.surface-detail .detail-value.highlight {
    color: var(--accent-success);
}

.surface-detail .coord-group {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
}

.surface-detail .coord-item {
    text-align: center;
    padding: var(--spacing-xs);
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
}

.surface-detail .coord-axis {
    font-size: 0.7rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.surface-detail .coord-axis.x {
    color: var(--axis-x);
}

.surface-detail .coord-axis.y {
    color: var(--axis-y);
}

.surface-detail .coord-axis.z {
    color: var(--axis-z);
}

.surface-detail .coord-value {
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 0.8rem;
    color: var(--text-primary);
}

/* Action Buttons */
.surface-detail .action-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.surface-detail .action-btn {
    flex: 1;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.surface-detail .action-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
}

/* ============================================
   Info Grid
   ============================================ */
.info-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
}

.info-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.info-value {
    font-size: 0.85rem;
    font-weight: 600;
    font-family: 'Monaco', 'Consolas', monospace;
    color: var(--accent-primary);
}

/* ============================================
   Measurement Info
   ============================================ */
.measurement-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.measurement-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
}

.measurement-item.highlight {
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, rgba(0, 217, 255, 0.1) 100%);
    border: 1px solid var(--accent-primary);
}

.measurement-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.measurement-value {
    font-size: 0.9rem;
    font-weight: 700;
    font-family: 'Monaco', 'Consolas', monospace;
    color: var(--accent-success);
}

/* ============================================
   3D Viewport
   ============================================ */
.viewport-container {
    flex: 1;
    position: relative;
    background: linear-gradient(180deg, #0a0a15 0%, #1a1a2e 100%);
}

#viewport {
    width: 100%;
    height: 100%;
}

#viewport canvas {
    display: block;
}

/* Viewport Controls */
.viewport-controls {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.control-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-md);
    background: rgba(22, 33, 62, 0.9);
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
}

.control-btn:hover {
    background: var(--bg-tertiary);
    transform: scale(1.1);
}

.control-btn.active {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

/* Axes Legend */
.axes-legend {
    position: absolute;
    bottom: var(--spacing-md);
    left: var(--spacing-md);
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(22, 33, 62, 0.9);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.axes-legend span {
    font-weight: 700;
    font-size: 0.9rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.axis-x {
    background: var(--axis-x);
    color: white;
}

.axis-y {
    background: var(--axis-y);
    color: black;
}

.axis-z {
    background: var(--axis-z);
    color: white;
}

/* ============================================
   Status Bar
   ============================================ */
.status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

#mouse-coords {
    font-family: 'Monaco', 'Consolas', monospace;
    color: var(--accent-primary);
}

/* ============================================
   CSS2D Labels (Three.js)
   ============================================ */
.label-3d {
    background: rgba(0, 217, 255, 0.9);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    pointer-events: none;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.label-3d.feature-label {
    background: linear-gradient(135deg, #ff6b6b 0%, #ffa502 100%);
}

.label-3d.surface-label {
    background: linear-gradient(135deg, #7bed9f 0%, #2ed573 100%);
    color: #1a1a2e;
}

.label-3d.axis-label {
    font-size: 14px;
    font-weight: 700;
}

.label-3d.axis-label.x {
    background: var(--axis-x);
}

.label-3d.axis-label.y {
    background: var(--axis-y);
    color: black;
}

.label-3d.axis-label.z {
    background: var(--axis-z);
}

/* ============================================
   Scrollbar Styling
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

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

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

/* ============================================
   Animations
   ============================================ */
@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 1.5s infinite;
}

/* ============================================
   Reference Section (基準面)
   ============================================ */
.reference-info {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border-left: 3px solid var(--text-muted);
}

.reference-info.active {
    border-left-color: var(--accent-warning);
}

.reference-feature-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.reference-feature-name {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--accent-warning);
}

.reference-feature-id {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.reference-surface-info {
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
}

.reference-surface-info .info-row {
    display: flex;
    justify-content: space-between;
    padding: 2px 0;
}

.reference-surface-info .info-label {
    color: var(--text-secondary);
}

.reference-surface-info .info-value {
    font-family: 'Monaco', 'Consolas', monospace;
    color: var(--accent-primary);
}

/* ============================================
   Comparison Section (特徵比較)
   ============================================ */
.compare-controls {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.compare-btn {
    flex: 1;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.compare-features-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.compare-feature-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm);
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--accent-secondary);
}

.compare-feature-item:first-child {
    border-left-color: var(--accent-primary);
}

.compare-feature-item .feature-info {
    flex: 1;
}

.compare-feature-item .feature-name {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.compare-feature-item .feature-id {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.compare-feature-item .remove-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    font-size: 0.8rem;
    transition: color var(--transition-fast);
}

.compare-feature-item .remove-btn:hover {
    color: var(--accent-danger);
}

.comparison-results {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
}

.comparison-results .result-header {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--border-color);
}

.comparison-results .result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) 0;
    font-size: 0.8rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.comparison-results .result-item:last-child {
    border-bottom: none;
}

.comparison-results .result-label {
    color: var(--text-secondary);
}

.comparison-results .result-value {
    font-family: 'Monaco', 'Consolas', monospace;
    font-weight: 600;
    color: var(--text-primary);
}

.comparison-results .result-value.highlight {
    color: var(--accent-success);
    font-size: 0.9rem;
}

.comparison-results .result-value.warning {
    color: var(--accent-warning);
}

.comparison-results .result-value.danger {
    color: var(--accent-danger);
}

.comparison-results .result-section {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
}

.comparison-results .result-section-title {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: var(--spacing-xs);
}

/* ============================================
   Action Buttons (特徵詳情按鈕)
   ============================================ */
.action-btn.reference {
    border-color: var(--accent-warning);
    color: var(--accent-warning);
}

.action-btn.reference:hover {
    background: rgba(255, 170, 0, 0.1);
}

.action-btn.reference.active {
    background: var(--accent-warning);
    color: var(--bg-primary);
}

.action-btn.compare {
    border-color: var(--accent-secondary);
    color: var(--accent-secondary);
}

.action-btn.compare:hover {
    background: rgba(123, 44, 191, 0.1);
}

.action-btn.compare.active {
    background: var(--accent-secondary);
    color: white;
}

.action-btn.compare-ref {
    border-color: var(--accent-warning);
    background: linear-gradient(135deg, var(--accent-warning) 0%, var(--accent-secondary) 100%);
    color: white;
    font-weight: 600;
}

.action-btn.compare-ref:hover {
    opacity: 0.9;
    transform: scale(1.02);
}

.action-btn.occlusion {
    border-color: #667eea;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: 600;
}

.action-btn.occlusion:hover {
    opacity: 0.9;
    transform: scale(1.02);
}

/* Hint Icon */
.hint-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(102, 126, 234, 0.2);
    border: 1px solid rgba(102, 126, 234, 0.5);
    color: #667eea;
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition-fast);
    margin-left: 8px;
}

.hint-icon:hover {
    background: rgba(102, 126, 234, 0.4);
    transform: scale(1.1);
}