Offending Font

Your first page www.w3.org is very easy to read for me.  But when I went to http://www.w3.org/Style/CSS/ I could not stand the font that the style sheet choose for my system.  I want to learn about Style sheets but can't stand to look at the page.  On my wife's computer another font was display.  I tried to find the offending font by comparing the entries in our font folder.  I also tried to display your main.css to see if I could find what font I so dislike.

Is there any way you could show me the style sheet that is used to display http://www.w3.org/Style/CSS/ is I can eliminate the offending font.

Thank you very much for your time and consideration.

Sincerely,
Bruce Kahn
Huntington, NY
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email address: bkahn@optonline.net
School Site: http://www.smithtown.k12.ny.us/highschl/math/kahn/index.htm