Set prefered with of module in Page template

[#1]

In a page I typically have a a div the size of the whole page then a div inside. The div inside is centered inside the first div and has a prefered with (width:100%; max-width:800px. 
now when I use hubspot drag and drop templates I cannot do this since there are 4 divs enclosing the module and hence width:100% has no effect resulting in a div of the size of its child elements. 
I am wondering if there is a nice way of doing this without going into html source mode. I am open to any suggestion on how to get the same result.

[#2]

@Yannick1 instead of targeting the div elements, use a class. For example, add the class "page-center" to your row in the drag and drop template, then in your css file use the styles:

.page-center { width: 100%; max-width: 800px; }

You will probably also need to overwrite the defaut grid float and margin styles to center align it on the page.

hope that helps!