.metro-section {
    background-color: rgba(243, 244, 246, 0.5);
}
.metro-map-container {
    border-radius: 1rem;
    overflow: hidden;
}
.metro-line-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 6px;
}
.line-1 {
    background-color: #FF0000; 
}
.line-2 {
    background-color: #0000FF; 
}
.line-3 {
    background-color: #00AA00; 
}