Responsive Results Summary using Flex and Media Query

What did you find difficult while building the project?

Linking and using json data in javascript and then linking that js file to html.

Which areas of your code are you unsure of?

I used flex in almost every element and I'm not sure if I did it correctly or if I overused it a bit much?

Do you have any questions about best practices?

Are there other ways I could have done better? Like certain css properties, how I grouped html elements using div tags, or html and css conventions I should know?