Responsive landing page using some flexbox and other fundamental CSS

For this project I was trying to practice some things I have learned from Manning publication's CSS IN DEPTH by Keith J. Grant. I was really trying to use relative units to build out the site to have a fluid, responsive design.

I don't like my approach to the image of the lady drinking coffee and the statistics on memberships and course hours. I think there could be a better approach to the positioning there. Anyways, I had fun with this one, cheers!