#btnTop{background-color:#ff5900;border:none;border-radius:50%;bottom:20px;box-shadow:0 4px 8px rgba(0,0,0,.2);color:#fff;cursor:pointer;display:none;font-size:20px;outline:none;padding:15px;position:fixed;right:20px;transition:all .3s ease;z-index:99}#btnTop:hover{background-color:#e14e00}@media screen and (max-width:768px){#btnTop{bottom:15px;font-size:18px;padding:12px;right:15px}}