Responsive landing page using Flexbox

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

It was a challenge to keep the images (backgrounds and illustrations) responsive to different screen sizes and still match the proposed design.

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

I used vw and percentages on header, main and footer sections thinking it would be the easiest way to make the page responsive. I would like to know if it was indeed a good solution.