* No setting colors or font sizes, power to users to decide those.
+* Only one font type (fixed or variable) per page. This is for
+ accessibility, we must not blow certain elements out-of-proportion
+ when a reader increases font size.
+
+* Bold and underline elements are OK since they should render fine
+ regardless of chosen font and gracefully degrade if a display does
+ not support them. Italics and strike-through elements must be
+ avoided as they do not render well with some displays or user-chosen
+ fonts.
+
* No JavaScript. JS is historically too buggy and insecure, and we will
never expect our readers to do either of the following:
a) read and audit all our code for on every single page load