*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html,body,#root{width:100%;height:100%;overflow:hidden}.fullscreen-iframe{width:100%;height:100%;border:none}.container{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:1rem;font-family:system-ui,-apple-system,sans-serif;color:#333}.spinner{width:40px;height:40px;border:4px solid #e0e0e0;border-top-color:#3b82f6;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.error{color:#dc2626;max-width:400px;text-align:center}button{padding:.5rem 1.5rem;border:none;border-radius:6px;background:#3b82f6;color:#fff;font-size:.875rem;cursor:pointer;transition:background .15s}button:hover{background:#2563eb}