I turned off all caching including CloudFlare and it appears the custom.css is not getting read. I did as follows:
with this approach in the browser:
and from what I can tell the custom.css is not being read at all? My screen resolution and browser information is as follows:
So what have I messed up here? Happy to give you back end access if needed. As I am going to have to add some additional menu items here and need to solve this.