How do I edit the print CSS?

I’m trying to edit the print media styles. On the webpage, the sidebar content overlaps the main content. Can anyone please let me know how to understand the print preview being generated for a webpage and how to fix its related CSS.?

The file you need to edit or comment out from being compiled is assets/less/bootstrap/print.less

https://github.com/roots/roots/blob/master/assets/less/bootstrap/print.less