.loader{position:fixed;top:0;left:0;width:100%;height:100%;background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:9999;transition:opacity .5s ease}.loader.hidden{opacity:0;pointer-events:none}.spinner{width:50px;height:50px;border:4px solid #e5e7eb;border-top:4px solid #3b82f6;border-radius:50%;animation:spin 1s linear infinite;margin-bottom:1rem}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}