.spinner{border:16px solid #f3f3f3;border-top-color:#3498db;border-radius:50%;width:80px;height:80px;animation:spin 2s linear infinite;margin:auto}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.spinner-container{display:flex;justify-content:center;align-items:center;height:100vh}