Style selectors cleanup

[ezra-sg]

Blocked by #136

Overview

Currently, many selectors throughout the site are unnecessarily specific, leading to unexpected failures of local styles (in a component's script tag) to take effect. additionally, many styles use selectors which are not namespaced in any way, leading to many opportunities for style bleeding

Acceptance criteria

• styles in app-wide stylesheets, ie. in css/
• component styles should be converted to BEM where relatively easy; otherwise (unlikely) SFC style tags should be set to scoped and a comment should be left in the style tag indicating the styles are deprecated (ie. it should be easy for new devs to see where styles do not reflect the standards held for the site in general)
• remove all scoped styles where easily possible

Technical considerations

N/A

Tasks