Where to adjust CSS?

Hi there.

Just wondering where I adjust the CSS for this plug-in?

Yes, its in the stylesheet file but typically what are the ID’s and classes etc?

I’m obviously quite a beginner to CSS (and PHP, HTML …) and I’m having trouble identifying the sections that require modification.

I’ve tried using Developer Tools in Chrome but it doesn’t reveal much for me.

Any help appreciated.

Regards,
Adam