.spinner-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.5);z-index:9999;justify-content:center;align-items:center}.spinner-overlay.active{display:flex}.spinner{border:4px solid #f3f3f3;border-top:4px solid #3498db;border-radius:50%;width:50px;height:50px;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}.spinner-container{text-align:center;padding:20px}