.back-to-top{position:fixed;bottom:20px;right:20px;padding:6px 11px;cursor:pointer;z-index:550;transform:translateX(100%);transition:transform .4s ease-out,opacity .4s ease-out;opacity:0}.back-to-top.primarybutton{padding:6px 11px}.back-to-top--visible{transform:translateX(0);opacity:1}