#LoadingOverlay {
top: 40%;
}

#LoadingOverlay .modal-body {
color: #fff;
font-size: 1.75em;
text-align: center;
}

#LoadingOverlay .modal-content.card {
background: transparent;
}

#LoadingOverlay .fa-spinner:before {
color: #fff;
font-size: 6em;
}



Remove classes (modal-content card)