Can't seem to fix this or optimize to mobile (when I resize browser window)

So this codepen link: codepen(.)io/kaitlyngosiaco/full/EMVvxd that I made won’t seem to fix itself when I shrink my window to iPhone size. All the content seems to get messed up and wonky.

I also would really love it if the graph below “Engagements” were to extend to the third column. Any idea how to go about these issues?

I’m no HTML expert, I’m a student who has to code this website for class but our professor isn’t giving us anything to work with. I’d love to hear what you guys could say that could help me fix this page and get it working properly!

Hi @kgosiaco

Generally we should make use of css media queries to make the website look better in different width

Make use of this: