[Plugin: WPaudio MP3 Player] CSS – Styling the Links

I just downloaded wpaudio. What I would like to do is something like this from the SoundManager website:
https://www.schillmania.com/projects/soundmanager2/demo/play-mp3-links/basic.html

I cannot figure out where to add this css. I know some of the css can be changed via the admin panel, but I want to do a little more than just style the fonts. Can this be done with wpaudio?