.fa.modal-loading {
    position: fixed;
    top: 50%;
    left: 50%;
    margin-top: -36px;
    margin-left: -36px;
    width: 72px;
    height: 72px;
    color: #555555;
    text-shadow: 0 1px 5px #fff;
    background-color: transparent;
    display: block;
    z-index: 10000;
}