HTML, CSS, CSS Variables and Flexbox and Javascript

This was the most involved project I have done to date. Creating multiple pages with different layouts and different types of Javascript was a challenge. I found that the layout and styling was easier than I thought. That is from the multiple projects I have worked on in Frontend Mentor. I had to use different Javascript files for the different pages as I couldn't get it to work from one file only. If anyone has any tips about the Javascript, I would be happy to hear them. Thanks

Background color isn't showing in the solution even though it is on the live site.