Wiki Viewer API

My codepen: https://codepen.io/bakecaker/pen/JOMYqQ?editors=1011

Wanted to add a slide up animation like the example but I already spent a lot of time on this project. Want to keep moving. If anyone could give me some insight on how to do that (I was playing around with the transitions in CSS and slideUp()/slideDown() jQuery methods but I couldn’t figure it out). Thanks for any feedback, will check back soon.