Advice Generator | HTML CSS JavaScript

I feel as though this is as close as I could get without spending quite a bit more time looking at the smallest of details but probably the hardest things for me were aligning the advice window to the center and having the footer relative to that. Its not the way that I wanted it, as its not completely responsive, but I believe it works well enough! If anyone has any tips on how to do that better than how I have it, I would love the feedback aswell as on anything else you notice!