#loading {
    position: fixed;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    display: block;
    background: #fff;
    z-index: 10000;
}

#loading img {
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -23px 0 0 -23px;
}
.modal-body {
    max-height: calc(100vh - 212px);
    overflow-y: auto;
}