.marker-cluster-small,
.marker-cluster-medium,
.marker-cluster-large {
    background: rgba(23, 105, 224, .16);
    border-radius: 50%;
}

.marker-cluster-small div,
.marker-cluster-medium div,
.marker-cluster-large div {
    display: flex;
    align-items: center;
    justify-content: center;

    margin: 5px;

    width: 30px;
    height: 30px;

    border-radius: 50%;

    background: #1769e0;
    color: #fff;

    font-size: 11px;
    font-weight: 850;

    box-shadow:
        0 4px 13px rgba(23, 105, 224, .28);
}

.marker-cluster-medium div {
    width: 34px;
    height: 34px;
    font-size: 11px;
}

.marker-cluster-large div {
    width: 38px;
    height: 38px;
    font-size: 12px;
}

.marker-cluster-medium {
    width: 44px !important;
    height: 44px !important;
}

.marker-cluster-large {
    width: 48px !important;
    height: 48px !important;
}