body{margin:0;font-family:system-ui,-apple-system,sans-serif;display:flex;justify-content:center;align-items:center;min-height:100vh;background-color:#f0f0f0}.container{text-align:center}.loader{border:4px solid #f3f3f3;border-top:4px solid #3498db;border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite;margin:0 auto 1rem}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}