Responsive Four card feature section with HTML & CSS

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

Completing this project after so many lacking.

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

while doing this project there are many things that doesn't go my way like adding flex-direction and border. I search google and write correct syntax and changed my code to look like the design.

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

In responsive design i usually create the desktop design and convert it to the mobile design. It was really tiring. From the start I used to design the websites for desktop and this is my third time designing / converting to mobile.