How do I edit the <html> tag and html tag's css?

I have a overflow-x scrolling issue that I’ve solved in my console by adding overflow-x = “hidden” to my html tag’s css. I can’t figure out how to edit this html tag in the Webflow interface though. How do I do this?

Also, I’ve tried adding overflow-x = “hidden” to the actual elements affecting the scroll width, as well as the body, but it doesn’t seem to help. Only editing the html tag works.

I’m also trying to edit the HTML tag on Webflow. But I don’t see any method to do so.