.back-to-top{display:none}.back-to-top .back-to-top-wrapper img{border-radius:50%;bottom:20px;box-shadow:0 4px 8px rgba(0,0,0,.1);position:fixed;right:20px;transition:all .3s ease-in-out;z-index:100}.back-to-top .back-to-top-wrapper{position:relative}.back-to-top-wrapper .default-img{opacity:0;visibility:none}.back-to-top-wrapper .hover-img,.back-to-top-wrapper:hover .default-img{opacity:1;visibility:visible}.back-to-top-wrapper:hover .hover-img{opacity:0;visibility:none}.dark-img{display:none}.dark-mode .dark-img{display:block}.dark-mode .light-img{display:none}@media (hover:none){.default-img-link{display:none}}