How do I control style for Jcomment latest module?

[arioli]

Objectives - the module is great, just formatting is adding too much space.
How do I change space options for the module output:

1. Space between title & border of frame
2. put author and date on the same line, separated by comma without using 2 lines
3. Reduce Line space bewtween 2 lines of the comments

Which css should I edit ? Just getting the name of the file + key things to look will be enought to sort what to
change in the code ... thanks a lot in advance..