.loading-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(255,255,255,.7);z-index:9999;display:flex;justify-content:center;align-items:center;opacity:0;pointer-events:none;transition:opacity .2s ease}.loading-overlay.is-active{opacity:1;pointer-events:auto}.spinner{width:50px;height:50px;border:5px solid #f3f3f3;border-top:5px solid #3498db;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}