.leaflet-marker-icon {
    color: #e74c3c;
    text-align: center;
    width: 20px !important;
    height: 20px !important;
    margin-left: -10px !important;
    margin-top: -10px !important;
}

.leaflet-marker-letter {
    background: #3498db;
    border-radius: 50%;
    color: white;
    text-align: center;
    line-height: 30px;
    font-weight: bold;
    width: 30px !important;
    height: 30px !important;
    margin-left: -15px !important;
    margin-top: -15px !important;
}