The Scotto Grotto (org)

I’m staying home again today, instead of spreading disease like Scotto Germyseed. I’m drinking Theraflu in which I can actually see tiny organisms evolving from radial to bilateral symmetry as I watch. Give to me health, O healing, hot, lemony brew!

Fiddling with CSS, and what I want to know is why I can’t specify type in CSS to degrade to different sizes, like so:

.sansesque { font: 12px Verdana, 14px Helvetica }

Given the x-height difference, those are really more equivalent than if both are at the same size. Does anyone know a workaround for this (or a reason it doesn’t make sense)?

(Yes, I know 14 px Helvetica looks ugly. just making an example, here)