Dynamic News- original style.css

Hello,
yesterday I tryed to change the size of my H1 and H2 tags, wich is way too big. As a result, it seems I have messed my widgets- they dont appear the way they should on my front page:
http://beautyandbeyondmag.com/
How can I get the original style.css sheet and how can I change the zise of my tags?

I hope I can get some help. Thanks

ps. Here is how my style.css looks like now:
[Redacted – You don’t have to post that, it’s all visible on your site]

[Advert moderated]