Technical Documentation Page-Responsive Web Design Projects

Can somebody help me with it?

I don’t know what’s wrong I am doing. it just doesn’t work. It passes all the test however I am unable to make it responsive on a smaller screen.

Thank you.

What browser are you using? Also, what zoom is your window at?
Reason I ask is it all passes for me.

Chrome. zoom is at 100%. never changed the zoom for anything here.