/* ============================================
   NOVA - Nursing Operational View of Actions
   Modern, Premium Design System
   ============================================ */

:root {
    /* Color Palette - Medical/Professional Theme */
    --primary: #0066cc;
    --primary-light: #3d8bdb;
    --primary-dark: #004d99;
    --secondary: #6c63ff;
    --success: #00c853;
    --success-dark: #00a844;
    --danger: #ff4757;
    --danger-dark: #e8384f;
    --warning: #ffc107;
    
    /* Neutrals */
    --bg-dark: #0f1419;
    --bg-card: #1a1f26;
    --bg-elevated: #242b33;
    --bg-hover: #2d353f;
    --border: #3a4149;
    --text-primary: #f5f7fa;
    --text-secondary: #9aa5b3;
    --text-muted: #6b7684;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

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

html, body {
    height: 100%;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    background: var(--bg-dark);
    color: var(--text-primary);
    overflow: hidden;
}

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

/* ============================================
   Header
   ============================================ */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

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

.logo-icon {
    font-size: 1.5rem;
}

.logo h1 {
    font-size: 1.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.version-badge {
    font-size: 0.65rem;
    padding: 2px 6px;
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-weight: 500;
}

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

.annotator-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
}

.annotator-info input {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--text-primary);
    width: 150px;
    font-size: 0.9rem;
}

.annotator-info input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.2);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-hover);
    border-color: var(--primary);
}

.btn-success {
    background: linear-gradient(135deg, var(--success), var(--success-dark));
    color: white;
}

.btn-success:hover:not(:disabled) {
    filter: brightness(1.1);
    transform: translateY(-1px);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), var(--danger-dark));
    color: white;
}

.btn-danger:hover:not(:disabled) {
    filter: brightness(1.1);
    transform: translateY(-1px);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
    flex: 1;
}

/* ============================================
   Main Content Layout
   ============================================ */
.main-content {
    display: flex;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

/* Panel Resizer - Hidden by default */
.panel-resizer {
    width: 1px;
    background: var(--border);
    flex-shrink: 0;
    transition: all var(--transition-fast);
    position: relative;
}

/* When in resize mode */
body.resize-mode .panel-resizer {
    width: 8px;
    background: var(--primary);
    cursor: col-resize;
}

body.resize-mode .panel-resizer::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 2px;
    height: 40px;
    background: white;
    border-radius: 1px;
}

/* Horizontal Resizer - Hidden by default */
.horizontal-resizer {
    width: 100%;
    height: 1px;
    background: var(--border);
    flex-shrink: 0;
    transition: all var(--transition-fast);
    position: relative;
}

/* When in resize mode */
body.resize-mode .horizontal-resizer {
    height: 8px;
    background: var(--primary);
    cursor: row-resize;
    z-index: 100;
}

/* Extend hit area with padding */
body.resize-mode .horizontal-resizer::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 0;
    right: 0;
    bottom: -8px;
    cursor: row-resize;
}

body.resize-mode .horizontal-resizer::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 2px;
    background: white;
    border-radius: 1px;
    pointer-events: none;
}

/* Layout controls in settings */
.layout-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
    padding: var(--spacing-xl);
}

.resize-hint {
    color: var(--text-secondary);
    text-align: center;
    padding: var(--spacing-md);
    background: var(--bg-elevated);
    border-radius: var(--radius-md);
}

/* Floating Resize Mode Overlay */
.resize-mode-overlay {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-card);
    border: 2px solid var(--primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-xl);
    display: none;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
}

.resize-mode-overlay span {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
}

.resize-mode-overlay p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

body.resize-mode .resize-mode-overlay {
    display: flex;
}

/* Floating Picker (for data type / video selection) */
.floating-picker {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--bg-card);
    border: 2px solid var(--primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    display: none;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    min-width: 300px;
}

.floating-picker.open {
    display: flex;
}

.floating-picker > span {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary);
}

.floating-picker > p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
    text-align: center;
}

.picker-options {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
}

.picker-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-elevated);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 100px;
}

.picker-option:hover {
    border-color: var(--primary);
    background: var(--bg-hover);
}

.picker-option span {
    font-size: 1.5rem;
}

/* Picker backdrop */
.picker-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1999;
    display: none;
}

.picker-backdrop.open {
    display: block;
}

/* ============================================
   Video Section
   ============================================ */
.video-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    min-width: 0;
}

.video-container {
    flex: 1;
    background: #000;
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    position: relative;
}

.video-placeholder {
    text-align: center;
    padding: var(--spacing-xl);
}

.upload-prompt {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.upload-icon {
    font-size: 4rem;
    opacity: 0.8;
}

.upload-prompt h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.upload-prompt p {
    color: var(--text-muted);
}

#video-player {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* ============================================
   Video Controls
   ============================================ */
.video-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
    gap: var(--spacing-md);
}

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

.control-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-elevated);
    border: 2px solid var(--border);
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: scale(1.05);
}

.control-btn.small {
    width: 36px;
    height: 36px;
    font-size: 0.9rem;
}

.time-display {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-left: var(--spacing-md);
}

.time-separator {
    margin: 0 var(--spacing-xs);
    color: var(--text-muted);
}

.frame-display {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-left: var(--spacing-md);
    background: var(--bg-elevated);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.speed-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
}

.speed-controls select {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--text-primary);
    cursor: pointer;
}

/* ============================================
   Timeline Section
   ============================================ */
.timeline-section {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-sm);
    overflow: hidden;
}

#timelines-container {
    overflow: hidden;
}

.timeline-row {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
}

.timeline-label {
    width: 70px;
    min-width: 70px;
    max-width: 70px;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-shrink: 0;
}

.timeline-canvas {
    flex: 1;
    min-width: 0;
    height: 28px;
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
    cursor: pointer;
}

#seek-slider {
    width: 100%;
    margin-top: var(--spacing-sm);
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--bg-elevated);
    border-radius: 3px;
    cursor: pointer;
}

#seek-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

#seek-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: none;
}

/* ============================================
   Annotation Panel
   ============================================ */
.annotation-panel {
    width: 340px;
    background: var(--bg-card);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.mode-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
}

.tab {
    flex: 1;
    padding: var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

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

.tab.active {
    color: var(--primary);
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary);
    border-radius: 3px 3px 0 0;
}

/* Annotation Types List */
.annotation-types {
    padding: var(--spacing-md);
    max-height: 200px;
    overflow-y: auto;
}

.annotation-type {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--spacing-xs);
}

.annotation-type:hover {
    background: var(--bg-hover);
}

.annotation-type.selected {
    background: var(--bg-elevated);
    border: 1px solid var(--primary);
}

.type-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    flex-shrink: 0;
}

.type-number {
    font-weight: 700;
    color: var(--text-muted);
    font-size: 0.85rem;
    width: 24px;
}

.type-name {
    flex: 1;
    font-size: 0.9rem;
}

/* Annotation Status */
.annotation-status {
    padding: var(--spacing-md);
    background: var(--bg-elevated);
    margin: 0 var(--spacing-md);
    border-radius: var(--radius-sm);
    text-align: center;
}

.status-idle p {
    color: var(--text-muted);
}

.status-idle kbd {
    background: var(--bg-dark);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', monospace;
    font-size: 0.85rem;
}

.status-recording {
    color: var(--danger);
    font-weight: 600;
}

.status-recording .recording-indicator {
    display: inline-block;
    width: 10px;
    height: 10px;
    background: var(--danger);
    border-radius: 50%;
    margin-right: var(--spacing-xs);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Annotation Controls */
.annotation-controls {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
}

/* Annotations List */
.annotations-list-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    border-top: 1px solid var(--border);
}

.annotations-list-container h3 {
    padding: var(--spacing-md);
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.annotations-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 var(--spacing-md) var(--spacing-md);
}

.annotation-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-xs);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.annotation-item .item-color {
    width: 4px;
    height: 32px;
    border-radius: 2px;
}

.annotation-item .item-info {
    flex: 1;
    min-width: 0;
}

.annotation-item .item-name {
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.annotation-item .item-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: 'SF Mono', monospace;
}

.annotation-item .delete-btn {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    opacity: 0;
    transition: all var(--transition-fast);
}

.annotation-item:hover .delete-btn {
    opacity: 1;
}

.annotation-item .delete-btn:hover {
    background: var(--danger);
    color: white;
}

/* ============================================
   Footer
   ============================================ */
.app-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}

.footer-info {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.keyboard-hints {
    display: flex;
    gap: var(--spacing-lg);
    color: var(--text-muted);
    font-size: 0.8rem;
}

.keyboard-hints kbd {
    background: var(--bg-elevated);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', monospace;
    margin-right: var(--spacing-xs);
}

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

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

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

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

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 1200px) {
    .annotation-panel {
        width: 300px;
    }
}

@media (max-width: 900px) {
    .main-content {
        flex-direction: column;
    }
    
    .annotation-panel {
        width: 100%;
        height: 300px;
    }
}

/* ============================================
   Icon Button
   ============================================ */
.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-danger-outline {
    background: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
}

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

/* ============================================
   Modal
   ============================================ */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-lg);
}

.modal.open {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 600px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

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

.modal-header h2 {
    font-size: 1.2rem;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

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

.settings-intro {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    font-size: 0.9rem;
}

/* ============================================
   Layer Editor
   ============================================ */
.layers-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.layer-editor {
    background: var(--bg-elevated);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.layer-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border);
}

.layer-color-picker {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 0;
    background: transparent;
}

.layer-color-picker::-webkit-color-swatch-wrapper {
    padding: 0;
}

.layer-color-picker::-webkit-color-swatch {
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
}

.layer-name-input {
    flex: 1;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
}

.layer-name-input:focus {
    outline: none;
    border-color: var(--primary);
}

.layer-shortcut-input {
    width: 40px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    color: var(--text-primary);
    text-align: center;
    text-transform: uppercase;
    font-weight: 600;
}

.layer-shortcut-input:focus {
    outline: none;
    border-color: var(--primary);
}

.delete-layer-btn {
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.delete-layer-btn:hover {
    background: var(--danger);
}

.layer-types {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.type-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
}

.type-color-picker {
    width: 24px;
    height: 24px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    padding: 0;
    background: transparent;
}

.type-color-picker::-webkit-color-swatch-wrapper {
    padding: 0;
}

.type-color-picker::-webkit-color-swatch {
    border: 1px solid var(--border);
    border-radius: 4px;
}

.type-id {
    width: 24px;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.85rem;
}

.type-name-input {
    flex: 1;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--text-primary);
    font-size: 0.85rem;
}

.type-name-input:focus {
    outline: none;
    border-color: var(--primary);
}

.delete-type-btn {
    width: 24px;
    height: 24px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.delete-type-btn:hover {
    background: var(--danger);
    color: white;
}

.add-type-btn {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: transparent;
    border: 1px dashed var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all var(--transition-fast);
}

.add-type-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(0, 102, 204, 0.1);
}

.settings-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
}

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

/* ============================================
   Multi-Modal: Modalities Container
   ============================================ */
.modalities-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    min-height: 200px;
    overflow-y: auto;
}

.no-modalities {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    color: var(--text-muted);
}

.no-modalities .upload-icon {
    font-size: 3rem;
}

.no-modalities h3 {
    color: var(--text-primary);
}

.video-modality {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.modality-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
}

.modality-icon {
    font-size: 1.1rem;
}

.modality-name {
    font-weight: 600;
    flex: 1;
}

.master-badge {
    background: var(--primary);
    color: white;
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
}

.modality-offset {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: 'SF Mono', monospace;
}

.modality-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.btn-icon-sm {
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    cursor: pointer;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.btn-icon-sm:hover {
    background: var(--bg-hover);
}

/* Video Overlay Container */
.video-overlay-container {
    position: relative;
    background: #000;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.modality-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

/* Single video: fill available space */
.video-modality:only-child .modality-video {
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
}

.video-modality:only-child .video-overlay-container {
    flex: 1;
    min-height: 0;
}

.video-modality:only-child {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

/* Multiple videos: constrain height */
.video-modality:not(:only-child) .modality-video {
    max-height: 280px;
}

.overlay-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.overlay-toggles {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(0, 0, 0, 0.8);
}

.overlay-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.8rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.overlay-toggle input {
    cursor: pointer;
}

/* Add Modality Bar */
.add-modality-bar {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
}

/* IMU Modality */
.imu-modality {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-top: var(--spacing-sm);
}

.imu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
}

.imu-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.imu-canvas {
    width: 100%;
    height: 80px;
    display: block;
}

/* ============================================
   Settings Tabs
   ============================================ */
.settings-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    padding: 0 var(--spacing-lg);
}

.settings-tab {
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-weight: 600;
    cursor: pointer;
    position: relative;
    transition: all var(--transition-fast);
}

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

.settings-tab.active {
    color: var(--primary);
}

.settings-tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary);
}

.settings-pane {
    padding: 0;
}

.modal-large {
    max-width: 700px;
}

/* ============================================
   Modality Editor (in Settings)
   ============================================ */
.modalities-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.no-modalities-msg {
    color: var(--text-muted);
    text-align: center;
    padding: var(--spacing-xl);
}

.modality-editor {
    background: var(--bg-elevated);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.modality-editor-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.modality-editor-header input[type="text"] {
    flex: 1;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 600;
}

.modality-editor-header input:focus {
    outline: none;
    border-color: var(--primary);
}

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

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

.btn-danger-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    background: transparent;
    border: none;
    cursor: pointer;
    border-radius: var(--radius-sm);
}

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

.modality-editor-body {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.modality-editor-body label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.modality-editor-body input[type="number"] {
    width: 70px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs);
    color: var(--text-primary);
    text-align: center;
}

.modality-editor-body select {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs);
    color: var(--text-primary);
}