body{padding-bottom:40px}.upbtn{z-index:9999;width:100%;height:5px;color:#2b1b0a;position:fixed;bottom:-80px;cursor:pointer;background:#2b1b0a;transition:all .3s ease-in-out}.upbtn:before{content:"";transition:all .3s ease-in-out;z-index:9999;width:70px;height:70px;border:9px solid #2b1b0a;position:relative;bottom:10px;right:50%;margin-left:-50px;cursor:pointer;display:block;transform:rotate(45deg);background:#fff}.upbtn:hover{height:16px}.upbtn:hover:before{bottom:14px}