How to add a sidebar to BRINE template?

Site URL: https://www.wonderlass.com/blog/episode82

Hey there! 😊 Does anyone know of a way to add CODE to the BRINE template in order to add a sidebar to the blog posts? 

After lots of research, the only workaround that I found was creating a separate "blog" in the "not linked" section, putting the sidebar info + images in that blog and then adding it as a summary > wall block to each individual blog post. While this looks great on the desktop version, (for example: https://www.wonderlass.com/blog/episode82) it looks horrible on the mobile version since the sidebar shows up right smack dab in the middle of the blog pots. 😬

If anyone knows how to add a sidebar to BRINE, OR how to hide a block on the mobile version of a site only, that would be AMAZING!

You can use CSS to remove sidebar on mobile.

I don't see sidebar on your site. Can you take screenshot?

I use a plugin that works great for this and - details in this post on How to Add a Sidebar to your Squarespace Blog. 

How can this be done without purchasing a 'plugin'?

I hate the option with a summary as a blog landing page! )))))) see my method in this thread: