/* XOR Problem Visualization Styles */

.container {
    max-width: 900px;
}

h2 {
    font-size: 1.3rem;
    font-weight: 500;
    color: #333;
    margin-bottom: 0.5rem;
    margin-top: 2rem;
}

h3 {
    font-size: 1.1rem;
    font-weight: 500;
    color: #444;
    margin-bottom: 0.5rem;
}

h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: #555;
    margin-bottom: 0.5rem;
}

.section-intro {
    color: #666;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.output-1 {
    color: #2e7d32;
    font-weight: 600;
}

.output-0 {
    color: #c62828;
    font-weight: 600;
}

/* Gate selector */
.gate-selector {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.gate-btn {
    padding: 0.5rem 1.5rem;
    border: 2px solid #ddd;
    background: white;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s;
}

.gate-btn:hover {
    border-color: #4A90E2;
    background: #f8fafc;
}

.gate-btn.active {
    border-color: #4A90E2;
    background: #4A90E2;
    color: white;
}

/* Model row - truth table, perceptron, activation */
.model-row {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

/* Truth table mini */
.truth-table-mini {
    flex-shrink: 0;
}

.truth-table-mini table {
    border-collapse: collapse;
    font-size: 0.85rem;
}

.truth-table-mini th,
.truth-table-mini td {
    padding: 0.3rem 0.8rem;
    border: 1px solid #ddd;
    text-align: center;
}

.truth-table-mini th {
    background: #f5f5f5;
    font-weight: 600;
}

/* Canvas row */
.canvas-row {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    flex-wrap: wrap;
}

.canvas-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.canvas-wrapper canvas {
    border: 1px solid #ddd;
    border-radius: 8px;
    background: #fafafa;
}

.canvas-label {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: #666;
    font-weight: 500;
}

.canvas-legend {
    display: flex;
    gap: 1rem;
    margin-top: 0.25rem;
    font-size: 0.75rem;
    color: #888;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.legend-line {
    display: inline-block;
    width: 20px;
    height: 2px;
    border-top: 2px dashed;
}

.legend-line.h1-line {
    border-color: #f57c00;
}

.legend-line.h2-line {
    border-color: #ff9800;
}

.legend-line.or-line {
    border-color: #1976d2;
}

.legend-line.nand-line {
    border-color: #ff9800;
}

.legend-line.output-line {
    border-color: #9c27b0;
}

.canvas-sublabel {
    font-size: 0.75rem;
    color: #888;
    margin-top: 0.25rem;
}

.gate-explanation {
    font-size: 0.8rem;
    color: #666;
    margin-top: 1rem;
    font-family: monospace;
    line-height: 1.5;
}

.legend-color {
    display: inline-block;
    width: 14px;
    height: 14px;
    border-radius: 3px;
    margin-right: 4px;
    vertical-align: middle;
}

.legend-color.or-color {
    background: rgba(100, 200, 100, 0.5);
}

.legend-color.nand-color {
    background: rgba(200, 230, 200, 0.5);
}

.legend-color.both-color {
    background: rgba(156, 39, 176, 0.6);
}

.info-box {
    flex: 1;
    min-width: 200px;
    max-width: 300px;
    padding: 1rem;
    background: linear-gradient(135deg, #f3e5f5 0%, #e8f5e9 100%);
    border-radius: 8px;
    border-left: 4px solid #9c27b0;
}

.info-box h4 {
    margin-bottom: 0.5rem;
    color: #7b1fa2;
}

.info-box p {
    font-size: 0.9rem;
    color: #555;
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

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

.xor-highlight {
    color: #9c27b0;
    font-weight: 600;
}

/* Status panel */
.status-panel {
    flex: 1;
    min-width: 220px;
}

.perceptron-diagram {
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
    text-align: center;
}

.perceptron-diagram h4 {
    margin-bottom: 0.5rem;
}

.perceptron-diagram canvas {
    display: block;
    margin: 0 auto;
    cursor: pointer;
}

.hover-hint {
    font-size: 0.75rem;
    color: #888;
    margin-top: 0.25rem;
}

.activation-section-part1 {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
}

.activation-section-part1 h4 {
    margin-bottom: 0.5rem;
}

/* Tooltip for neuron hover */
.neuron-tooltip {
    position: fixed;
    background: rgba(0, 0, 0, 0.85);
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-family: monospace;
    pointer-events: none;
    z-index: 1000;
    line-height: 1.4;
}

.perceptron-weights {
    margin-bottom: 1rem;
    padding: 1rem;
    background: #f0f7ff;
    border-radius: 8px;
}

.weight-hint {
    font-size: 0.8rem;
    color: #666;
    margin-bottom: 0.75rem;
}

.perceptron-weights .weight-row {
    margin-bottom: 0.4rem;
}

.perceptron-weights .weight-row label {
    min-width: 80px;
}

.classification-status {
    margin-bottom: 1rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
}

.point-status {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin: 0.5rem 0;
}

.point-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: monospace;
    font-size: 0.9rem;
}

.point-label {
    color: #666;
}

.status-icon {
    font-weight: bold;
}

.status-icon.correct {
    color: #2e7d32;
}

.status-icon.wrong {
    color: #c62828;
}

.accuracy-display {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid #ddd;
    font-weight: 600;
    color: #333;
}

.boundary-equation {
    margin-bottom: 1rem;
    padding: 1rem;
    background: #f0f7ff;
    border-radius: 8px;
}

.equation {
    font-family: monospace;
    font-size: 0.9rem;
    color: #0066cc;
    line-height: 1.6;
}

.equation-algebra {
    color: #666;
}

.equation-values {
    color: #0066cc;
    font-weight: 500;
}

.message-box {
    padding: 1rem;
    background: #fff3cd;
    border-radius: 8px;
    color: #856404;
    font-size: 0.9rem;
}

.message-box.success {
    background: #d4edda;
    color: #155724;
}

.message-box.impossible {
    background: #f8d7da;
    color: #721c24;
}

.message-box .gate-link {
    color: #0d6efd;
    font-weight: 600;
    text-decoration: underline;
    cursor: pointer;
}

.message-box .gate-link:hover {
    color: #0a58ca;
}

.message-box.success .gate-link {
    color: #0d6efd;
}

/* Network section */
.network-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid #eee;
}

.network-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.preset-btn {
    padding: 0.5rem 1rem;
    border: 1px solid #4A90E2;
    background: white;
    color: #4A90E2;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.preset-btn:hover {
    background: #4A90E2;
    color: white;
}

/* Space rows for Part 2 */
.space-row {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.space-row .weight-section {
    flex: 1;
    min-width: 360px;
    max-width: 480px;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
}

.space-row .canvas-wrapper {
    flex-shrink: 0;
}

/* Network diagram */
.network-diagram {
    margin: 2rem 0;
    padding: 1.5rem;
    background: #f8f9fa;
    border-radius: 8px;
}

.network-diagram-row {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    flex-wrap: wrap;
}

.architecture-section {
    flex: 1;
}

.architecture-section h4 {
    margin-bottom: 0.5rem;
}

.architecture-canvas-wrapper {
    display: flex;
    justify-content: center;
}

#networkDiagramCanvas {
    max-width: 100%;
    cursor: pointer;
}

.activation-section {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.activation-section h4 {
    margin-bottom: 0.5rem;
}

.activation-canvas-wrapper {
    background: white;
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 5px;
}

.activation-label {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: #666;
    font-family: monospace;
}

/* Weight controls */
.weight-section {
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
}

.mini-network-wrapper {
    display: flex;
    justify-content: center;
    margin-bottom: 0.75rem;
}

.mini-network-wrapper canvas {
    background: transparent;
}

.weight-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.weight-row label {
    min-width: 90px;
    font-size: 0.85rem;
    font-family: monospace;
}

.weight-row label span {
    font-weight: 600;
    color: #333;
}

.weight-row input[type="range"] {
    flex: 1;
    height: 6px;
    -webkit-appearance: none;
    background: #ddd;
    border-radius: 3px;
    outline: none;
}

.weight-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: #4A90E2;
    border-radius: 50%;
    cursor: pointer;
}

/* Computation table */
.computation-table {
    margin: 1.5rem 0;
}

.computation-table table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.computation-table th,
.computation-table td {
    padding: 0.5rem 0.75rem;
    border: 1px solid #ddd;
    text-align: center;
}

.computation-table th {
    background: #f5f5f5;
    font-weight: 600;
}

.computation-table td {
    font-family: monospace;
}

.network-accuracy {
    margin-top: 1rem;
    font-weight: 600;
    font-size: 1rem;
    color: #333;
}

/* Explanation section */
.explanation-section {
    margin-top: 2rem;
}

.insight-box {
    padding: 1.5rem;
    background: linear-gradient(135deg, #f0f7ff 0%, #e8f4f8 100%);
    border-radius: 8px;
    border-left: 4px solid #4A90E2;
}

.insight-box p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

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

.formula {
    text-align: center;
    margin: 1rem 0;
    font-size: 1.1rem;
}

/* Dynamic evaluation equations */
.eval-equations {
    margin-top: 0.75rem;
    padding: 0.75rem 0.75rem 0.4rem;
    background: white;
    border-radius: 6px;
    border: 1px solid #e0e0e0;
    font-family: monospace;
    font-size: 0.78rem;
    line-height: 1.4;
}

.eval-equations .eval-title {
    font-family: Arial, sans-serif;
    font-weight: 600;
    font-size: 0.8rem;
    color: #555;
    margin-bottom: 0.5rem;
}

.eval-row {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.3rem;
    margin-bottom: 0.45rem;
    padding-bottom: 0.45rem;
    border-bottom: 1px solid #f0f0f0;
}

.eval-row:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.eval-row .eval-label {
    font-weight: 600;
    color: #333;
    min-width: 4.5em;
}

.eval-row .eval-expansion {
    color: #888;
}

.eval-row .eval-sum {
    color: #0066cc;
    font-weight: 500;
}

.eval-row .eval-arrow {
    color: #999;
}

.eval-row .eval-result.output-1 {
    color: #2e7d32;
}

.eval-row .eval-result.output-0 {
    color: #c62828;
}

/* Responsive */
@media (max-width: 768px) {
    .canvas-row {
        flex-direction: column;
        align-items: center;
    }
    
    .space-row {
        flex-direction: column;
        align-items: center;
    }
    
    .space-row .weight-section {
        max-width: 100%;
        width: 100%;
    }
}