Move the sidebar outside of the content

Hey guys ?? I’m trying to create a new website and I have a question about the sidebar.
Is it possible to center my content and move the sidebar with it?

I got a no sidebar template which will center my content, but I do would love to keep the sidebar sticking next to it. What would be a way to approach this while maintaining responsiveness? The CSS way or the template editting way?

I would love to know what way to go ??

The page I need help with: [log in to see the link]