/** LOADER ANIMATION **/
#spinner-back, #spinner-front 
{
    position: absolute;
    width: 100%;
    transition: all 1s;
    visibility: hidden;
    opacity: 0;
}

#spinner-back 
{
    z-index: 9998;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
}

#spinner-front 
{
    z-index: 9999;
    color: #fff;
    text-align: center;
    margin-top: 50vh;
    transform: translateY(-50%);
}

#spinner-back.show, #spinner-front.show 
{
    visibility: visible;
    opacity: 1;
}