I edit my style.css but my logo doesn't change

Hi all,

I have read all threads I found on WP about resizing your logo. I have tried what’s been suggested in those but despite that, my logo remains the same size, nothing changes at all.

I’m a bit desperate since I have been working on this for three weeks and I’m still stuck. Would anyone mind giving me a hand, please?

I use a minamaze child theme that I have created and amended.

My website is https://www.acuhealth.org.uk.

Thanks a lot, Alexandra