I’m a beginner to Reactjs and while I was making a project I came across a problem. In my landing page I want it to have a background colour that is dark like thisA picture of a welcome screen with a dark background and a light square with some text on it

My only problem is that when I do this it affects the rest of my pages on the app, giving them a dark background. How do I fix this?

I tried to use modular css and give the body different class names but the background doesn’t change. It stays as either black or white, it doesn’t change depending on the page I’m on.