.modern_clean_scroll_to_top_btn{width:40px;height:40px;position:fixed;z-index:20;bottom:20px;right:20px;background:#ac1800;color:#fff;text-align:center;display:flex;flex-flow:row wrap;justify-content:center;align-items:center;text-decoration:none!important;visibility:hidden;opacity:0;transition:all 0.3s ease}.modern_clean_scroll_to_top_btn:hover{background:#c31d02}.modern_clean_scroll_to_top_btn.show{visibility:visible;opacity:1}