Responsive Intro Component with Sign Up Form

When I first looked at this challenge, I thought it would be relatively simple, and that I could complete complete the task in less than a day's work. I was wrong.

Unsurprisingly, the problem came with getting the invalid form state to look right. It took so much longer than expected to get the icon, border, and text to show up in the right place; the icon wouldn't show up and it took an unreasonable amount of time to realize that it was showing up, it was just much farther to the right than expected.

I am content with where it is as an MVP, but not a final draft. If anyone has any resources on styling forms, or can point me in the direction of what knowledge I'm lacking that is making this so difficult would be much appreciated.

Cheers!