.scroll-to-top button{position:fixed;bottom:80px;right:20px;width:40px;height:40px;border-radius:50%;text-align:center;outline:none;border:2px solid #fff;color:#fff;box-shadow:0 12px 28px 0 rgba(0,0,0,.2),0 2px 4px 0 rgba(0,0,0,.1),inset 0 0 0 1px hsla(0,0%,100%,.05);z-index:999}.scroll-to-top button:hover{background-color:#000;transition:1s}@media only screen and (min-width:420px) and (max-width:992px){.scroll-to-top button{bottom:90px}}@media only screen and (min-width:0px) and (max-width:400px){.scroll-to-top button{bottom:90px;right:20px}}