Custom Header not showing up on Posts

I created a sidebar menu for my website using css. It looks and functions how I want it to regular pages, but is not working properly with posts.

I think the issue lies in my CSS but can't figure it out. I am using Elementor as well.

Here is how I want it to look:
http://clovrdev.emergearizona.com

Here is the posts page:
http://clovrdev.emergearizona.com/test/

Let me know if there are any questions. Thanks in advance.