Hello gweisler,
We can help with that CSS, but not without seeing actual site and its code. Or if you are familiar with CSS and code inspector element you can adjust those margins using classes for body tag – they are different for each of the page. So on post page you use .single class – and on archives it will have .archive class. Using those selectors before your code you can target page.
kind regards,
Kasia
Thank you for using Custom Sidebars. I am going to mark this topic resolved because we haven’t heard from you in awhile. If this issue was not resolved we can reopen it. Thanks again!