/* Interactive Neural Network Styles */

.nn-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto auto;
    gap: 2rem;
    margin-top: 2rem;
}

/* Control Panel */
.control-panel {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
}

.control-panel h3 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.25rem;
}

.control-group {
    margin-bottom: 1rem;
}

.control-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.control-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.control-group input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.control-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.control-group select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.control-hint {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
    font-style: italic;
}

.control-group input[type="range"] {
    width: 100%;
    margin-bottom: 0.5rem;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-secondary);
    outline: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.control-group input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.button-group {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.button-group button {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-primary:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
    transform: none;
}

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

.btn-secondary:hover {
    background: var(--bg-tertiary);
    transform: translateY(-1px);
}

/* Training Section */
.training-section {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
}

.training-section h3 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.25rem;
}

.progress-container {
    margin-bottom: 1.5rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color), #10b981);
    width: 0%;
    transition: width 0.3s ease;
}

#progressText {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.charts-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.chart-wrapper {
    background: var(--bg-primary);
    border-radius: 8px;
    padding: 1rem;
    border: 1px solid var(--border-color);
}

.chart-wrapper canvas {
    max-width: 100%;
    height: auto;
}

/* Drawing Section */
.drawing-section {
    grid-column: 1 / -1;
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    align-items: start;
}

.drawing-section h3 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.25rem;
    grid-column: 1 / -1;
}

.canvas-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

#drawingCanvas {
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: white;
    cursor: crosshair;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.canvas-controls {
    display: flex;
    gap: 1rem;
}

.prediction-result {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.prediction-result h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.prediction-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.prediction-digit {
    font-size: 4rem;
    font-weight: bold;
    color: var(--accent-color);
    text-align: center;
    min-height: 4rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.prediction-confidence {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.prediction-details {
    margin-top: 1rem;
}

.prediction-breakdown {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.prediction-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.prediction-bar-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    min-width: 20px;
}

.prediction-bar-fill {
    flex: 1;
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
}

.prediction-bar-progress {
    height: 100%;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

.prediction-bar-value {
    font-size: 0.8rem;
    color: var(--text-secondary);
    min-width: 40px;
    text-align: right;
}

/* Nearest Examples Section */
.nearest-examples-section {
    grid-column: 1 / -1;
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
    margin-top: 1rem;
}

.nearest-examples-section h3 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.25rem;
}

.comparison-container {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    align-items: start;
}

.user-drawing {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.user-drawing h4 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1rem;
}

#userDrawingPreview {
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: white;
    image-rendering: pixelated;
}

.nearest-examples h4 {
    margin: 0 0 1rem 0;
    color: var(--text-primary);
    font-size: 1rem;
}

.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 1rem;
    max-width: 500px;
}

.example-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background: var(--bg-primary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.example-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.example-canvas {
    width: 56px;
    height: 56px;
    border: 1px solid var(--border-color);
    background: white;
    image-rendering: pixelated;
}

.example-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-color);
}

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

/* Data Visualization */
.data-section {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
}

.data-section h3 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.25rem;
}

.data-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.data-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--bg-primary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.data-status {
    font-weight: 500;
    color: var(--text-primary);
}

.data-count {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.sample-digits h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1rem;
}

.digits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
    gap: 1rem;
    max-width: 400px;
}

.digit-sample {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    background: var(--bg-primary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.digit-canvas {
    width: 28px;
    height: 28px;
    border: 1px solid var(--border-color);
    background: white;
    image-rendering: pixelated;
}

.digit-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-color);
}

/* Model Information */
.model-info {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
}

.model-info h3 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.25rem;
}

.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.info-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.info-value {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 600;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nn-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .drawing-section {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .charts-container {
        grid-template-columns: 1fr;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    #drawingCanvas {
        width: 100%;
        max-width: 280px;
        height: auto;
    }
    
    .comparison-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .examples-grid {
        grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
    }
}

@media (max-width: 480px) {
    .nn-container {
        gap: 1rem;
    }
    
    .control-panel,
    .training-section,
    .drawing-section,
    .model-info {
        padding: 1rem;
    }
    
    .prediction-digit {
        font-size: 3rem;
    }
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--accent-color);
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Success/Error States */
.success {
    color: #10b981;
}

.error {
    color: #ef4444;
}

.warning {
    color: #f59e0b;
}

/* Data status states */
.data-status.success {
    color: #10b981;
}

.data-status.error {
    color: #ef4444;
}

.data-status.warning {
    color: #f59e0b;
}