Twenty Ten with Google Fonts – Fonts won't change

hi – i’ve created a child theme and have added the plugin WP Google Fonts. now i am trying to change the font size and line height.

my test web site can be found here:

i’ve tried adding the following to my style.css of my child theme, but it doesn’t work. nothing i change in here for pixel size shows up in my site. i’m trying to change the main text font-size and line-height.

#content, #content input, #content textarea {
    color: #333333;
    font-size: 16px;
    line-height: 24px;
}

can’t figure out what i am doing wrong.