Styles are applied twice

[K20shores]

Describe the bug
At least on the dev server, several styles are loaded twice on the site.

To Reproduce
Steps to reproduce the behavior:

1. Run the local dev server (npm run dev)
2. Go the the mechanisms page
3. Right click on the M species and inspect its styles
4. See styles applied twice

Expected behavior
Styles are only loaded once. They are currently loaded twice because the global.css file is imported in several of our other stylesheets which is incorrect (as identified in #229).

We probably need to rethink our css setup. I thought they were setup as modules so that conflicts wouldn't occur, but that doesn't seem to be the case. Either way, the global.css styles shouldn't be imported in other style sheets

Screenshots