/* ============================================
   Brain Lesion Segmentation - Slicer UI Styles
   ============================================ */

/* CSS Variables */
:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --accent-blue: #4a90d9;
    --accent-green: #4caf50;
    --accent-red: #f44336;
    --accent-orange: #ff9800;
    --accent-purple: #9c27b0;
    --border-color: #2a2a4a;
    --shadow-color: rgba(0, 0, 0, 0.3);
    
    /* Semantic colors for metrics */
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --error-color: #f44336;
    
    /* View colors */
    --axial-color: #4caf50;
    --sagittal-color: #2196f3;
    --coronal-color: #ff9800;
    
    /* 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;
}

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

/* Base */
html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Header */
.header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.header .subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding-left: var(--spacing-md);
    border-left: 1px solid var(--border-color);
}

.status-indicator {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.75rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    transition: background-color 0.3s;
}

.status-dot.connected {
    background: var(--accent-green);
    box-shadow: 0 0 8px var(--accent-green);
}

.status-dot.disconnected {
    background: var(--accent-red);
}

/* Main Content */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Control Panel */
.control-panel {
    width: 280px;
    min-width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.panel-section {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.panel-section h3 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* 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: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--bg-primary);
    color: var(--text-primary);
}

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

.btn:active:not(:disabled) {
    transform: translateY(0);
}

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

.btn-primary {
    background: var(--accent-blue);
    color: white;
}

.btn-success {
    background: var(--accent-green);
    color: white;
}

.btn-info {
    background: var(--accent-purple);
    color: white;
}

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

/* Upload Area */
.upload-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.upload-hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Info Box */
.info-box {
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    font-size: 0.75rem;
}

.info-box p {
    margin-bottom: var(--spacing-xs);
}

.info-box p:last-child {
    margin-bottom: 0;
}

/* Select Input */
.select-input {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.875rem;
}

.select-input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

/* Tool Buttons */
.tool-buttons {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.tool-btn {
    flex: 1;
    min-width: 70px;
    padding: var(--spacing-sm);
    font-size: 0.75rem;
}

.tool-btn.active {
    border: 2px solid var(--accent-blue);
    background: var(--bg-secondary);
}

.point-indicator {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.point-indicator.positive {
    background: var(--accent-green);
}

.point-indicator.negative {
    background: var(--accent-red);
}

/* Prompt List */
.prompt-list {
    max-height: 120px;
    overflow-y: auto;
    margin-top: var(--spacing-sm);
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs);
}

.prompt-list .empty-message {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.75rem;
    padding: var(--spacing-sm);
}

.prompt-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs);
    font-size: 0.7rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-xs);
}

.prompt-item:last-child {
    margin-bottom: 0;
}

.prompt-item .prompt-type {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.prompt-item .prompt-type.positive {
    background: var(--accent-green);
}

.prompt-item .prompt-type.negative {
    background: var(--accent-red);
}

.prompt-item .prompt-coords {
    flex: 1;
}

.prompt-item .prompt-delete {
    cursor: pointer;
    opacity: 0.5;
}

.prompt-item .prompt-delete:hover {
    opacity: 1;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.action-buttons .btn {
    width: 100%;
}

/* Status Message */
.status-message {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    text-align: center;
}

.status-message.success {
    background: rgba(76, 175, 80, 0.2);
    color: var(--accent-green);
}

.status-message.error {
    background: rgba(244, 67, 54, 0.2);
    color: var(--accent-red);
}

.status-message.info {
    background: rgba(74, 144, 217, 0.2);
    color: var(--accent-blue);
}

/* Sliders */
.slider-group {
    margin-bottom: var(--spacing-sm);
}

.slider-group label {
    display: block;
    font-size: 0.75rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
}

.slider {
    width: 100%;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-primary);
    border-radius: 2px;
    outline: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
}

.slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
    border: none;
}

/* Viewer Area */
.viewer-area {
    flex: 1;
    padding: var(--spacing-md);
    overflow: hidden;
}

.viewer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: var(--spacing-md);
    height: 100%;
}

.viewer-container {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    border: 2px solid var(--border-color);
    transition: border-color 0.2s;
}

.viewer-container:hover {
    border-color: var(--accent-blue);
}

#axial-container {
    border-color: var(--axial-color);
}

#sagittal-container {
    border-color: var(--sagittal-color);
}

#coronal-container {
    border-color: var(--coronal-color);
}

.viewer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    font-size: 0.75rem;
}

.view-label {
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.view-label.axial { color: var(--axial-color); }
.view-label.sagittal { color: var(--sagittal-color); }
.view-label.coronal { color: var(--coronal-color); }
.view-label.info { color: var(--text-secondary); }

.slice-info {
    color: var(--text-secondary);
    font-family: monospace;
}

.viewer-canvas {
    flex: 1;
    background: #000;
    position: relative;
    cursor: crosshair;
}

/* Info Panel (4th quadrant) - Split Layout */
.info-panel-split {
    flex: 1;
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    overflow: hidden;
}

.info-left {
    flex: 1;
    min-width: 0;
    overflow-y: auto;
    padding-right: var(--spacing-sm);
    border-right: 1px solid var(--border-color);
}

.info-right {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.info-left h4,
.info-right h4 {
    font-size: 0.75rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.info-left p {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

/* Overlap Viewer */
.overlap-viewer {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.overlap-canvas-container {
    position: relative;
    flex: 1;
    min-height: 160px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    cursor: ns-resize;
}

#overlap-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.overlap-canvas-container .slice-indicator {
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.7);
    color: var(--text-primary);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.65rem;
    font-family: var(--font-mono);
    pointer-events: none;
    z-index: 10;
}

.overlap-placeholder {
    position: absolute;
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-align: center;
    padding: var(--spacing-sm);
}

.overlap-placeholder small {
    font-size: 0.6rem;
    opacity: 0.7;
}

.overlap-placeholder.hidden {
    display: none;
}

/* Overlap Legend */
.overlap-legend {
    margin-top: var(--spacing-xs);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
    font-size: 0.6rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--text-secondary);
}

.legend-color {
    width: 10px;
    height: 10px;
    border-radius: 2px;
    flex-shrink: 0;
}

.legend-color.tp {
    background: #4caf50; /* Green - True Positive */
}

.legend-color.fp {
    background: #f44336; /* Red - False Positive */
}

.legend-color.fn {
    background: #2196f3; /* Blue - False Negative */
}

.legend-color.pred-only {
    background: #ff9800; /* Orange - Prediction only (no GT) */
}

.crosshair-info,
.seg-info,
.dice-info,
.keyboard-shortcuts {
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.dice-info #gt-status {
    font-weight: 500;
}

.dice-info .btn-small {
    margin-top: var(--spacing-xs);
    padding: 3px 6px;
    font-size: 0.6rem;
}

.keyboard-shortcuts:last-child {
    border-bottom: none;
}

.keyboard-shortcuts p {
    font-size: 0.6rem;
}

kbd {
    display: inline-block;
    padding: 1px 4px;
    font-size: 0.6rem;
    font-family: monospace;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    min-width: 40px;
    text-align: center;
}

/* Footer */
.footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-lg);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.footer code {
    background: var(--bg-primary);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: monospace;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--bg-tertiary);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-overlay p {
    margin-top: var(--spacing-md);
    color: var(--text-primary);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 1001;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px var(--shadow-color);
    min-width: 250px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success {
    border-left: 4px solid var(--accent-green);
}

.toast.error {
    border-left: 4px solid var(--accent-red);
}

.toast.info {
    border-left: 4px solid var(--accent-blue);
}

.toast-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.toast-message {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Hidden utility */
.hidden {
    display: none !important;
}

/* 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(--accent-blue);
}

/* Responsive adjustments */
@media (max-width: 1200px) {
    .control-panel {
        width: 240px;
        min-width: 240px;
    }
}

@media (max-width: 900px) {
    .main-content {
        flex-direction: column;
    }
    
    .control-panel {
        width: 100%;
        min-width: auto;
        flex-direction: row;
        flex-wrap: wrap;
        max-height: 200px;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .panel-section {
        flex: 1;
        min-width: 200px;
    }
    
    .viewer-grid {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: 1fr 1fr;
    }
}

/* Canvas crosshair cursor */
.viewer-canvas.crosshair {
    cursor: crosshair;
}

/* Prompt markers on canvas */
.prompt-marker {
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 10;
    border: 2px solid white;
    box-shadow: 0 0 4px rgba(0, 0, 0, 0.5);
}

.prompt-marker.positive {
    background: var(--accent-green);
}

.prompt-marker.negative {
    background: var(--accent-red);
}