Please keep these points in mind when trying to mix old style commands
with CSS commands:
Make sure your CSS commands change all the same text
characteristics as the <font> tags. For example, if the <font>
tag changes both the color and typeface of the text, then the CSS commands
should also specify the colour and typeface. Otherwise, the part of the
<font> tag that was not re-defined will still apply to your text.
Test how your page appears without stylesheets. The best way is to use an
external stylesheet. To see what your page looks like to browsers that
don't support stylesheets, simply comment out your reference to the
external stylesheet.
Test that all the fonts have had some "class" attached to them. Do this by
changing the stylesheet temporarily to use really outragous values that
are easy to spot (like 40pt text, or magenta letters). That will tell you
if the classes are being applied properly.