body .modal-dialog.type-image_only { /* Width */
    max-width: 100%;
    width: auto !important;
    display: inline-block;
}

.modal.image_only  {
    z-index: -1;
    display: flex !important;
    justify-content: center;
    align-items: center;
    padding: 1%;
}

.modal-open .modal.image_only {
    z-index: 1050;
}

.modal-body .modal-image-container {
    margin: 0 auto;
    text-align: center;
}