Try to keep your font usage in HTML very simple, using only fonts that you are certain your readers have on their systems. A browser’s substitution for an unavailable font can be quite ugly.
§21.6.1 Specifying a default font and size
§21.6.4 Including or excluding font tags
§21.6.5 Managing font tags for symbol fonts
§21.6.6 Excluding the face attribute from font tags
§21.6.7 Accommodating browser font-rendering differences