html,body{width:100vw;min-height:100vh;margin:0 auto;background:linear-gradient(#111 0,#2e2e2e 50%,#111 100%)}body{font-family:Open Sans,Arial,Helvetica,sans-serif;font-weight:400}.flex-container{display:flex;justify-content:center;align-items:center}.lds-dual-ring{display:inline-block;width:80px;height:80px}.lds-dual-ring:after{content:" ";display:block;width:64px;height:64px;margin:8px;border-radius:50%;border:6px solid #fff;border-color:#fff transparent #fff transparent;animation:lds-dual-ring 1.2s linear infinite}@keyframes lds-dual-ring{0%{transform:rotate(0)}to{transform:rotate(360deg)}}