#back2Top{background-color:#ddd;border-radius:100px;bottom:50px;color:#555;cursor:pointer;display:none;font-size:35px;line-height:60px;opacity:.6;overflow:hidden;position:fixed;right:50px;text-align:center;text-decoration:none;transition:.3s linear;width:60px;z-index:999}#back2Top:hover{background-color:#125da1;color:#fff;opacity:1}