.scroll-top{position:fixed;bottom:1rem;right:1rem;width:50px;height:50px;border:1px solid #333;background-color:#333;z-index:9;opacity:0;border-radius:50%;transition:.4s ease;overflow:hidden;display:flex;justify-content:center;align-items:center}.scroll-top.scroll-top-active{opacity:.4;filter:grayscale(100%)}.scroll-top.scroll-top-active:hover{opacity:1;filter:grayscale(0)}.scroll-top svg{height:20px;fill:#fff;