#loading-spinner{align-items:center;background:rgba(0,0,0,.5);color:#fff;display:none;font-family:Arial,sans-serif;height:100%;justify-content:center;left:0;position:fixed;text-align:center;top:0;width:100%;z-index:9999}.spinner-container{align-items:center;display:flex;flex-direction:column}.spinner{animation:spin 1s linear infinite;border:5px solid #f3f3f3;border-radius:50%;border-top-color:#3498db;height:50px;width:50px}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}