Your question is Responsive Layout with CSS. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Describe how you would build a responsive layout using modern CSS (Grid or Flexbox) that adapts fluidly across mobile, tablet, and desktop viewports without relying on heavy UI frameworks at Rad Hires.