Font enlarged, changed unintentionally

Hi, I’m new to WordPress, and am using the default 1.6 theme (based on Kubrick). My site can be found here: mitchkumstein.com.

I don’t have much background in html and have been muddling through format changes. The most recent changes I made really screwed up the page formatting, but fortunately I had saved a copy of the stylesheet in a word doc before my most recent changes. Once I pasted the old version back, most of the formatting was fixed, with one notable exception:

All of the font sizes were increased substantially, and some (all?) of the fonts were changed from the default into Times.

Any ideas of what I can do to get the font back to normal? One additional note: when I pasted the old Stylesheet into word, I did not include the “song” written at the end of the stylesheet, and may have also taken out some characters like these: “/*”

Thanks for the help!