#scrollToTopBtn{background-color:#fff;border:none;border-radius:50%;bottom:20px;box-shadow:2px 2px 5px rgba(0,0,0,.3);color:#000;cursor:pointer;display:none;font-size:24px;height:50px;position:fixed;right:20px;transition:opacity .3s,visibility .3s;width:50px}#scrollToTopBtn:hover{background-color:#c2583e;color:#fff}#scrollToTopBtn.show{display:block}