html,body,#app{margin:0;padding:0;height:100%}.container{width:100%;height:100vh;position:relative}.iframe-box{width:100%;height:100%;border:0}.loading-wrapper{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center}.spinner{width:50px;height:50px;border:5px solid #ddd;border-top-color:#409eff;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.error-404{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:#999}.error-404 h2{font-size:2rem;color:#f44336}.error-404 p{font-size:1.2rem}