Product category list formatting

Dear support team,

I am struggling to format the product category lists

https://www.screencast.com/t/p0iHpmfcAZv

The following I want to realize:
1) a smaller space in between the categories. In the given example there is a huge space between 10er Systembeute and Ablegerkasten

2) Further it would be nice if the Categories would be surrounded and aligned by a fine greyish outline (like the line around the products below) and the description should be centered in this box. The size of the boxes should be aligned and matched to the product boxes below.

3) Further it would be nice to have a fine line (and some space above and below) between the categories and the products as a visual divider?

To give you an understanding what I mean a roughly outlined the points in this screenshot:
https://www.screencast.com/t/DyEC69az

Thanks for your help