#scrolltop{background:#ccc;background-color:rgba(166,166,166,0.2);border-radius:5px;cursor:pointer;display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center;opacity:0;position:fixed;text-align:center;text-rendering:optimizeLegibility;-webkit-transition:opacity .3s ease-in-out;transition:opacity .3s ease-in-out;z-index:7000;height:3rem;width:3rem;font-size:4rem;line-height:1;right:25px;bottom:25px;color:#666;color:rgba(166,166,166,0.9)}#scrolltop:hover{-webkit-filter:brightness(108%);filter:brightness(108%)}#scrolltop svg{display:inline-block;width:1em;height:1em;vertical-align:middle;position:relative}@media (min-width: 40em){#scrolltop{height:4rem;width:4rem}}