body { 
    font-family: Arial, sans-serif; 
    margin: 0; 
    padding: 0; 
    height: 100%; 
}
#map { 
    position: absolute; 
    top: 0; 
    bottom: 0; 
    width: 100%; 
    height: 100vh; 
}
.zone-toggle { 
    position: absolute; 
    top: 10px; right: 10px; 
    z-index: 1; 
}
.zone-button { 
    background: #fff; 
    color: #000; 
    padding: 10px; 
    border: none; 
    margin: 2px; 
    cursor: pointer; 
}
.zone-button:hover { 
    background: #f0f0f0; 
}
.zone-button.active {
    background: #007cbf;
    color: #fff;
}
.legend {
    position: absolute;
    top: 50px;
    right: 15px;
    background: white;
    padding: 10px;
    font-family: Arial, sans-serif;
    border-radius: 5px;
    box-shadow: 0 1px 5px rgba(0, 0, 0, 0.65);
    z-index: 10;
}
.legend h4 {
    margin: 0 0 10px;
}
.legend div {
    display: flex;
    align-items: center;
    margin-bottom: 5px;
}
.legend span {
    display: block;
    width: 20px;
    height: 20px;
    margin-right: 10px;
    border-radius: 50%;
}