Hello,
I'm working on a website, and would like some help with a css issue I'm currently facing.
In this page, I have a " Catégories " module that can rise up when scrolling down the page. However, when doing so, the module's title is hidden behind the header as shown here. 
Looking at the CSS in firefox's inspector, I saw that there was a " top: 100px " property that I could temporarily modify (to 140px) to make it visible (See Image below) but I can't find how to change it permanently. I tried searching for the file that would contain said element (a div) and its corresponding CSS, but to no avail.

Thus, would there be a way to slide down the module a little so that the Title is visible ?
Thank you.