.loading{left:calc(50% - 35px);top:40%;position:fixed;border:.5em solid rgba(0,0,0,.1);border-top-color:#3498db;border-radius:50%;width:70px;height:70px;animation:spin 1s linear infinite;z-index:999}.scrollup{position:fixed;bottom:20px;right:20px;background-color:#2e7d32;border-radius:5px;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border:none;cursor:pointer;opacity:0;transition:opacity .3s ease-in-out;z-index:1000}.scrollup.visible{opacity:1}.scrollup i{font-size:22px;color:#fff}