html,body{margin:0;padding:0;overflow:hidden;width:100%;height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:#000}#viewport{display:block;width:100%;height:100%;background-color:#000}#spinner{position:fixed;top:0;left:0;width:100vw;height:100vh;display:flex;align-items:center;justify-content:center;z-index:10000;background:#111}#spinner>div{width:60px;height:60px;border:8px solid #333;border-top:8px solid #00eaff;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}