html,body{margin:0;height:100%;overflow:hidden}iframe{width:100%;height:100%;border:none}.spinner-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#fff;display:flex;justify-content:center;align-items:center;z-index:1050}.spinner{border:4px solid rgba(0,0,0,.1);border-left:4px solid #000;border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite}.spinner-container{display:flex;flex-direction:column;align-items:center;gap:10px}.spinner-text{font-size:16px;color:#000}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}