.loading {
    position: fixed;
    display: none;
    z-index: 2000;
    height: 100%;
    width: 100%;
    margin: auto;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}

/* Transparent Overlay */
.loading:before {
    content: '';
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.3);
    /* backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px); */
}

/* :not(:required) hides these rules from IE9 and below */
.loading:not(:required) {
    font: 0/0 a;
    color: transparent;
    text-shadow: none;
    background-color: transparent;
    border: 0;
}

.loading:not(:required):after {
    content: '';
    display: block;
    position:absolute;
    width: 3rem;
    height: 3rem;
    top:50%;
    left:50%;
    border: 5px solid white;
    border-right-color: transparent;
    border-radius: 50%;
    -webkit-animation: spinner-border 1500ms infinite linear;
    animation: spinner-border 1500ms infinite linear;    
}


/* Animation */

@-webkit-keyframes spinner-border {
    from{
        -webkit-transform:translate(-50%,-50%) rotate(0deg); 
        transform:translate(-50%,-50%) rotate(0deg); 
    }
    to {
        -webkit-transform:translate(-50%,-50%) rotate(360deg);
        transform:translate(-50%,-50%) rotate(360deg);
    }
}

@keyframes spinner-border {
    from{
        -webkit-transform:translate(-50%,-50%) rotate(0deg); 
        transform:translate(-50%,-50%) rotate(0deg); 
    }
    to {
        -webkit-transform:translate(-50%,-50%) rotate(360deg);
        transform:translate(-50%,-50%) rotate(360deg);
    }
}