How to align page header without affecting post header?

Hi,

I am trying to align the page header (about, experience, vision, investment, heirloom) to the left side of the page but I can’t seem to do that without affecting the actual blog title itself. I like the blog titles to be centered but not the page headers. Anyone able to help me with this issue?

Information page
https://justindemutiisphotographyblog.com/about/
https://justindemutiisphotographyblog.com/vision/
https://justindemutiisphotographyblog.com/experience/
https://justindemutiisphotographyblog.com/investment/
https://justindemutiisphotographyblog.com/heirlooms/

The post page (landing page)
https://justindemutiisphotographyblog.com/

Thanks.