/* public/css/duration-analysis-chart.css */
.heatmap-section {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    margin: 30px 0;
    border: 1px solid #eaeaea;
}
.section-header {
    margin-bottom: 20px;
}
.section-subtitle {
    color: #666;
    font-size: 15px;
    line-height: 1.5;
}
#heatmap-status {
    color: #2c3e50;
    font-weight: 500;
}
.heatmap-legend {
    display: flex;
    gap: 20px;
    margin: 15px 0;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    flex-wrap: wrap;
}
.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}
.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 3px;
    border: 1px solid rgba(0,0,0,0.1);
}
.heatmap-controls {
    margin: 20px 0 10px 0;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.heatmap-controls .btn {
    font-size: 13px;
    padding: 6px 12px;
}