P2 Breathe - change default font to em or rem base instead of px for better accessibility

[pauljacobson]

Steps to replicate

Some P2s are configured with a fixed font, such as 14px. I noticed this on some internal Automattic P2s. For example:

Result

This setting ignores a user's browser font preferences, and delivers what could be a small font for users who prefer larger text.

Expected

Changing the default font-size setting to something like em or rem should improve accessibility for users who prefer larger font sizing.

[davidakennedy]

This is a great suggestion. However, changing the font units on an older design active on so many sites could have unintended consequences. So I'm going to close this. We should address this type of feedback in a P2 redesign in the future.