Hi David,
I found similar code just after I used the ticket and put it in the customiser and it worked okay, I guess in this location it was for the whole website.
I removed the above code and placed your code (a:hover, a:focus { color: #558efc !important; }) where you suggested and it worked too and I’m guessing it’s just for the footer element which is much better.
I had noticed the Custom CSS in Advanced but never considered it. So a couple of things learned and hover working as I want to – thank you.