Non-responsive and grow big animation?

Hi guys–

I’m having trouble with two things; first, getting my site to responsively shift through different view sizes (generally), and secondly, I am trying to figure out a way to get three images that I have put into a grid on my ‘content strategy and ux’ page to pop up and fill up most of the page when you click on them. The grow big animation just makes it grow momentarily and disappear. Any ideas?

Here is the read only link: