a#btt-button{position:fixed;bottom:2rem;right:2rem;display:grid;place-content:center;width:50px;height:50px;border-radius:50%;color:#fff;text-decoration:none;box-shadow:0px 0px 13px 3px rgba(0,123,255,0.37);transition:all ease-in-out .3s}a#btt-button:after{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(137deg,rgba(10,188,40,1) 0%,rgba(0,123,255,1) 40%,rgba(245,20,86,1) 100%);border-radius:50%;opacity:.85;z-index:-1;transition:all ease-in-out .3s}a#btt-button:hover{box-shadow:0px 0px 13px 3px rgba(0,123,255,0.5)}a#btt-button:hover:after{opacity:1}@media(min-width:1260px){a#btt-button{right:10%}}