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Can't integrate codepen particles snippet

Hello Webflow enthusiasts,

I’m struggling to integrate this awesome animation on my page:

I followed the steps, adding the css/js in the header and embedded the html in the page.
Here’s the result: https://sphere-test.webflow.io/
And the designer: https://preview.webflow.com/preview/sphere-test?utm_medium=preview_link&utm_source=designer&utm_content=sphere-test&preview=60aa7ae760d386a7acefe1b7f9598d4a&mode=preview

Am I missing something? Is it not possible to include snippets containing particles in Webflow?

Any help is greatly appreaciated!

Alex