HN: Define font-family in CSS besides Verdana?

If your system doesn't have Verdana, the default font (a serif font) is used. HN should specify fallbacks if Verdana isn't present, like "font-family: Verdana, Arial, Helvetica, sans-serif" (note: not a web guy, plz correct me if I'm wrong.. but having HN be serif on my Linux (Fedora 19 Firefox) machine just looks weird and old-timey..)