I've been trying to increase the text size on the main text but failed every single time.

Could you please advise me on how to go about it? Not knowing what I'm doing I ended up with this on the standard.css file:

/*
=============== 01. DEFAULT STYLES =================
*/
body {
background:#fde7ae url(../images/background.png);
font-size: 75%; /* Resets 1em to 10px */
line-height:22px;
min-width:980px;
color:#747474;
}

The text doesn't change and still is too small.

Thanks!