Sidebar and main concent area together

Dear Sparklinkg Staff,

I don’t know if my previous post was published, so I try again just in case. Is there any CSS way to put together the main content area or the sidebar? (without any space between them, sharing the same border).

Thanks in advance for your help!

Like this:

Hi @propaganda,

I hope you are well today and thank you for your question.

You can try achieving this by adding the following CSS code in the Custom CSS option of the latest version of Sparkling theme on the below path.

Admin Area -> Appearance -> Customize -> Sparkling Options -> Other -> Custom CSS

#page div#secondary {
    padding: 0;
#page .main-content-inner {
    padding: 0;

Best Regards,