body input textarea coding doesn't govern my fonts

Working with twentyeleven child. I’m trying to change the sitewide font. My site is here. The only part of the body input textarea section of css which is changeable is the color. I even went into the parent theme editor and changed the pixel size in there from 15 to 40, and then checked the site, and there was no change. When I look at the text on my blog page with firefox, all the parts of the body-input-textarea code are crossed out except for color.

I have successfully changed fonts in the header, and I even used a downloaded font.

Did this break the capacity of the theme to deal with fonts in the rest of the site?

Thanks for any help.