Center Related Posts on Mobile too

Hi,

I tried using the solution on this thread: https://www.ads-software.com/support/topic/how-to-center-align-related-posts-text-and-images/#post-11621847

I found that this worked great for desktop but not mobile. Is there any additional CSS or something I could tweak to have it work on mobile as well? It remains left-aligned.

Thanks,
Ryan

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