.scroll-up a{background-color:rgba(100,100,100,.5);color:#fff}.scroll-up a{width:38px;height:38px;border-radius:2px;opacity:.7}.scroll-up a svg{height:25px;width:25px}.scroll-up{display:none}.scroll-up{position:fixed;z-index:999;bottom:1.8em;right:1.8em}