Thanks for that. It works now because of the css I added in my previous message.
BUT, There is a ‘back to top’ button at the bottom right. It has a line going around the outside of the circle which slowly completes as you scroll down the page. The line is not filling up to 100% when you reach the bottom. Please fix that.
See this image: https://prnt.sc/-e4fdPzQtsCX