.the-scroll-up{
    position: fixed;
    display: none;
    bottom: 60px;
    right: 20px;
    height: 48px;
    width: 48px;
    border-radius: 2px;
    background-color: #fff;
    box-shadow: 0 4px 24px rgba(0, 0, 0, .16);
    border: none;
    transform: rotate(-90deg);
    background-image: url('/wp-content/uploads/assets/icons/left-arrow.svg');
    background-repeat: no-repeat;
    background-position: 50%;
    transition: all .2s ease-in-out;
    opacity: 0;
    z-index: 10;
    cursor: pointer;
}
.the-scroll-up--active{
    opacity: .6;
    display: block;
}