wordpress styles refactor

[yochannah]

in many place we have repeated styles that aren't necessary; it would be nice to cut down on the lines of duplicate code and/or add a pre-processor + good docs to the CSS.

It's also important to note that where possible styles should automatically be applied to content: right now there are many cases where someone may be using the WYSIWYG block editor in wordpress and accidentally delete a class or id which breaks the site formatting. Adding these classes to the templates so they don't need to be edited manually by content editors would make things much better!