a.up{
    display: block;
    position: fixed;
    right: 30px;
    bottom: 30px;
    padding: 5px;
    font-weight: bold;
    opacity: 0;
    pointer-events: none;
    transition:1s opacity;
    text-decoration:none;
    z-index:9999;
    color:#ffffff80;
    font-size: 20px;
}
.scrolled .up{
    opacity: 1;
    pointer-events:all;
    z-index:9999;
}
.up i{
    font-size:60px;
}