#scrollToTopBtn {
    position: fixed;
    bottom: 25px;
    right: 25px;
    z-index: 998;
    width: 45px;
    height: 45px;
    background-color: rgba(44, 62, 80, 0.7);
    color: #fff;
    border: 0;
    border-radius: 50%;
    font-size: 18px;
    cursor: pointer;
    transition: opacity .3s, visibility .3s, background-color .3s;
    box-shadow: 0 4px 12px rgba(0,0,0,.15);
    display: none;
    align-items: center;
    justify-content: center;
}
#scrollToTopBtn:hover { background-color: rgba(44, 62, 80, .9); color:#fff; }
#scrollToTopBtn svg { display:block!important; position:absolute!important; top:50%!important; left:50%!important; transform:translate(-50%,-50%)!important; }
@media (max-width:991.98px) { #scrollToTopBtn { bottom:75px; right:15px; } }