Time tracking dashboard with js, html ,css

What are you most proud of, and what would you do differently next time?

Kept working on the projects

What challenges did you encounter, and how did you overcome them?

1. Click on the options, the option color is changed. - tried to use css presudo class for this, but failed, looked into other's code. Separated to different ones.
2. The layout of the media query sometimes are not applied, fixed this because the class rank is lower than the default media.
3. The cards was generated by the data.json. - learned to deal data with js

What specific areas of your project would you like help with?

1. Seems I was using flex box too much, would it be a good choice, or the suggested way?