.marker-label {
    background-color: white;
    border: 2px solid red;
    border-radius: 50%;
    color: red;
    font-weight: bold;
    height: 25px;
    line-height: 25px;
    text-align: center;
    width: 25px;
}
.btn-track {
    padding: 5px;
    margin: 4px;
    background: #4285F4;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}