#backToTop{position:fixed;bottom:120px;right:20px;display:none;background-color:#ff7d23;color:#fff;border:none;padding:5px;font-size:18px;border-radius:100px;cursor:pointer;transition:opacity .3s ease;z-index:9999;width:50px;height:50px;text-align:center;line-height:15px}#backToTop:hover{background-color:#fff;color:#ff7d23;border:1px solid #ff7d23}