.ipanel-viewer{position:relative;width:100%;background:#f5f5f5;border-radius:8px;overflow:hidden;display:flex;align-items:center;justify-content:center}.ipanel-load-btn{padding:12px 24px;background:#06c;color:#fff;border:0;border-radius:4px;font-size:16px;cursor:pointer;box-shadow:0 2px 8px rgba(0,0,0,.2)}.ipanel-load-btn:hover{background:#0052a3}.ipanel-error{padding:20px;text-align:center}.ipanel-viewer model-viewer{width:100%;height:100%}