<script src=" https://cdn.jsdelivr.net/npm/three-cad-viewer@3.4.0/dist/three-cad-viewer.min.js "></script>
<link href=" https://cdn.jsdelivr.net/npm/three-cad-viewer@3.4.0/dist/three-cad-viewer.min.css " rel="stylesheet">
No default CSS file set by the package author so the URL is guessed. You can always browse all package files to use another one.