Boxed content for templated post-types editing

Thank you for suggestions.
Bit lost here… I found that Cwicly uses a max-width of 1440px and centers horizontally with a margin:0.
If I get my screen down, it is still sticking to edges below 1440px.

I found the other issue.
If NOT through themer (I use singular post type post or page with “all”) then both post and page will have the 1440px limit which I guess is good. Not so good to me but I don’t know what others think. I mostly complain about side paddings as I don’t like stuff sticking to the edges.
If I use themer for page, then there is no limit (no boxed) and same for post respectively.
So this 1440px fix works when not templated through themer as I mentioned in the title.

I will reference this on the other thread mentioned by Araminta as Louis asked there for any input.