.modal-backdrop {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1040;
    background-color: rgba(0,0,0,0.25) !important;
}

.select2-container--default .select2-selection--single .select2-selection__arrow {
    margin-top: 7px;
}