[css-fonts] Specify that the default "medium" font-size should by 16px?

We should probably specify that the "medium" font size SHOULD default
to being equal to 16px, unless the UA has good reason to do otherwise.
 A new browser would likely be forced to implement this, so we should
specify it.

~TJ

Received on Wednesday, 15 January 2014 23:58:26 UTC