/* SIR Modeling Page Styles */

/* Override default section padding */
.hero-section,
.controls-section,
.results-section {
    min-height: auto; /* Override the 100vh min-height */
}

/* Hero Section */
.hero-section {
    background: var(--gradient-subtle);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-2xl) 0 var(--spacing-xl);
}

.hero-section .section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.hero-section h1 {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.intro-text {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    line-height: 1.7;
}

/* Controls Section */
.controls-section {
    padding: var(--spacing-lg) 0 var(--spacing-3xl);
    background: white;
}

.controls-wrapper {
    display: grid;
    gap: var(--spacing-3xl);
}

.controls-panel {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-3xl);
    box-shadow: var(--shadow-md);
}

.controls-panel h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-2xl);
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: var(--spacing-md);
}

.control-group {
    margin-bottom: var(--spacing-xl);
}

.control-group label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-base);
}

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

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--forest-green);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.control-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--forest-green);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow-sm);
}

.control-value {
    display: inline-block;
    font-weight: 600;
    color: var(--forest-green);
    font-size: var(--font-size-base);
    min-width: 80px;
}

/* Derived Metrics */
.derived-metrics {
    background: var(--secondary-color);
    border-radius: 8px;
    padding: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.derived-metrics h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.metric {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.metric label {
    color: var(--text-secondary);
    font-weight: 500;
}

.metric span {
    font-weight: 600;
    color: var(--forest-green);
}

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--forest-green);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    width: 100%;
    justify-content: center;
}

.btn-primary:hover {
    background: var(--forest-green-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

/* Preset Scenarios */
.preset-scenarios {
    margin-top: var(--spacing-2xl);
}

.preset-scenarios h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.preset-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.preset-btn {
    background: white;
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-base);
    font-weight: 500;
    font-size: var(--font-size-sm);
}

.preset-btn:hover {
    border-color: var(--forest-green);
    color: var(--forest-green);
    background: var(--secondary-color);
}

/* Results Section */
.results-section {
    padding: var(--spacing-2xl) 0 var(--spacing-4xl);
    background: var(--secondary-color);
}

.results-section h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-3xl);
    text-align: center;
}

/* Charts */
.chart-container {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    box-shadow: var(--shadow-md);
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.chart-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
}

.chart-legend {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 2px;
}

.legend-color.susceptible {
    background-color: #3b82f6;
}

.legend-color.infected {
    background-color: #ef4444;
}

.legend-color.recovered {
    background-color: #10b981;
}

.legend-color.vaccinated {
    background-color: #8b5cf6;
}

.legend-color.hospitalized {
    background-color: #f59e0b;
}

.legend-color.deceased {
    background-color: #374151;
}

.chart {
    width: 100%;
    height: 400px;
    min-height: 300px;
}

/* Secondary Charts */
.secondary-charts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.half-width .chart {
    height: 300px;
}

/* Statistics Panel */
.stats-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-3xl);
}

.stat-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-2xl);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    background: var(--secondary-color);
    border-radius: 8px;
    padding: var(--spacing-md);
    color: var(--forest-green);
    font-size: var(--font-size-lg);
}

.stat-content h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.stat-content span {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    display: block;
}

.stat-content small {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    font-weight: 500;
}

/* Model Information */
.model-info {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-3xl);
    box-shadow: var(--shadow-md);
}

.model-info h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-2xl);
    text-align: center;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.info-card {
    background: var(--secondary-color);
    border-radius: 8px;
    padding: var(--spacing-xl);
}

.info-card h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.info-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.info-card ul {
    list-style: none;
    padding: 0;
}

.info-card ul li {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-md);
    position: relative;
    line-height: 1.6;
}

.info-card ul li::before {
    content: "•";
    color: var(--forest-green);
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* Equations */
.equations {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    font-family: 'Courier New', monospace;
    background: white;
    padding: var(--spacing-lg);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.equation {
    font-size: var(--font-size-base);
    color: var(--text-primary);
    font-weight: 500;
}

/* Loading and Empty States */
.chart-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 400px;
    color: var(--text-muted);
    font-style: italic;
}

.chart-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 400px;
    color: var(--text-muted);
    font-style: italic;
}

.chart-empty i {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

/* Responsive Design */
@media (max-width: 768px) {
    .secondary-charts {
        grid-template-columns: 1fr;
    }
    
    .preset-buttons {
        grid-template-columns: 1fr;
    }
    
    .chart-legend {
        justify-content: center;
    }
    
    .chart-header {
        flex-direction: column;
        text-align: center;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-panel {
        grid-template-columns: 1fr;
    }
    
    .half-width .chart {
        height: 250px;
    }
}

@media (max-width: 480px) {
    .hero-section h1 {
        font-size: var(--font-size-3xl);
    }
    
    .controls-panel {
        padding: var(--spacing-xl);
    }
    
    .chart {
        height: 300px;
    }
    
    .half-width .chart {
        height: 200px;
    }
}

/* Animation for loading states */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 2s infinite;
}

/* Tooltip styles for charts */
.tooltip {
    position: absolute;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: var(--spacing-sm);
    border-radius: 4px;
    font-size: var(--font-size-xs);
    pointer-events: none;
    z-index: 1000;
}

/* Chart axis and grid styling */
.axis {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.axis path,
.axis line {
    fill: none;
    stroke: var(--border-color);
    shape-rendering: crispEdges;
}

.grid line {
    stroke: var(--border-light);
    stroke-dasharray: 2,2;
    shape-rendering: crispEdges;
}

.grid path {
    stroke-width: 0;
}