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Can you help me to fix the size and aligning the dynamic box


I’m trying to make the image like those gray boxes but can’t figure out… Can anyone help me?

Here’s my site:
https://preview.webflow.com/preview/baebu?utm_source=baebu&preview=d53ca5b6a2f9762d8ed3790bb28e5c89

Here is my site Read-Only: https://preview.webflow.com/preview/baebu?utm_source=baebu&preview=d53ca5b6a2f9762d8ed3790bb28e5c89
([how to share your site Read-Only link][2])

[2]: https://university.webflow.com/article/sharing-your-sites-read-only-link

It isn’t clear what you want and the site looks different? Are you sorted?