Problem with customizing 3 column CSS code

Generally, when you want to post this much code it’s a good idea to use a pastebin service. https://pastebin.be is the one I usually use since it works quickest.

There’s too much code here to be easily readable, since the forum mangles some of and it’s not syntax highlighted. Plus you’ve not included a link to the site in question. That also helps speed up the process, since people can actually see the problem ??

hehe, moderator got there while i was posting ??

Your best bet may be to find a 3 column theme you like over at https://themes.wordpress.net/ and customize it. Teaching CSS layout is a bit beyond our scope. ??

Hi, I put the code up at https://pastebin.be/2804/. This is a modified theme, Devener en gris. I appreciate any help.