.darkBoxLoading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #d0cdcd2f;
    z-index: 99;
}
.MapMenuBox {
    position: absolute;
    min-height: 50%;
    min-width: 50%;
    top: 50%;
    left: 50%;
    z-index: 12;
    transform: translate(-50%, -50%);
    border: 1px solid red;
}

.MapMenuBox_darkBox {
    border: 1px dashed green;
}