if you use Firebug in Fire Fox, it will allow you to inspect element s on your page to find class names or IDs that you can use to create advanced style.
for example, the add to cart buttons are a submit input type, that have the class of "button"
so the following css can be added:
input.button {font-family:Verdana, Geneva, sans-serif; }
for details on using Fire Bug, see the following page:
roadmap_10.php