Resize post element in Upfront

Greetings, and good day to you!

I would like to know how can I resize the height of the "posts" element in Upfront. This element is particularly "stubborn" to height resizing by dragging its inferior box edge upward, so I think I may need some help tweaking its CSS or the like. Image 1 shows the minimum height the "post" element has and image 2 shows what I want.

Can you help me out?