Third mission❗: WAI-ARIA and ::before/::after with position:absolute

I'll write down what I learned while working on the third mission.

This mission had quite a lot of elements, so I think it took the longest of all the missions I've done so far.

I had never studied WAI-ARIA, but I found an example while clone coding in a Zerobase (a Korean online course platform) lecture, so I applied it to this project.

Also, when I added elements with the pseudo-element selectors ::before and ::after, they didn't show up, and I wondered what the problem was. I learned that they get applied when you use position:absolute.

Other than that, I don't think anything was especially hard.