Responsive landing page using flexbox

I continue to learn to use flexbox. It sometimes takes me some time to get the settings right so the elements line up just the way I want them. The description always seems so straightforward, and I invariably do something that makes things wonky until I spend a lot of time messing with it.

I struggled a bit with the relative positioning of the hero image. The placement was tricky on the media queries. I had white space on the right edge of the image that was coming from either padding or margin that I had set with star or body or something. Once I got that figured out, things went more smoothly.

I always appreciate constructive criticism and suggestions for how I can improve.