Margin only on published site


I’ve been working for quite a while on the site for the company I work for. First, I’ve got to say I am not a web designer, so it may have some bugs or non-elegant way of solving things… Sorry for intruding, web designers!

I am having an issue with the divblock on the middle-right of the page which showcases our projects, which is creating a non-existing margin, but only when the page is published. It is driving me nuts, I can’t figure it out!

Here’s a screenshot of the site on the designer:

And here’s a screenshot of the published site, with a red line indicating where the issue is:

Link to the published site

Thank you very much in advance!

Here is my site Read-Only: LINK
(how to share your site Read-Only link)