Shrink table row height

Questions
1

I am trying collapse unused space at the bottom of a table.
I am receiving the following when creating a table

Here is the CSS

I also tried adding the green code, but it did nothing.
Any ideas?

2

Try putting it in a wrapper. I think what is happening is that the table is trying to fill the container it is currently in. If you put it inside a wrapper with default settings, the wrapper should cause the table to collapse to just the rows displayed