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This wasn't required to be responsive; however, I wonder what I am missing if it were to be responsive. I did a preview using chrome tools to see layout on mobile devices and it seems fine but does my approach scale with complexity? Feedback on this aspect would be appreciated - Thank you

I am new to coding so if you give feedback, I would appreciate tightening on:

• Inefficiency, redundancies that a professional would avoid?
• Have I actually ensured that the scaling is ok across different screen sizes?

If other things come to your mind when reviewing, please inform me!