.loading-outer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #f1f1f1;
    z-index: 100;
}

.nb-spinner {
    display: block;
    margin-left: auto;
    margin-right: auto;
    margin-top: 5em;
}