Clean up CSS

[adamghill]

There are 3 CSS files:

1. tailwind-3.3.5.css
2. buzzsprout.css
3. djangobrew.css

The first 2 were pilfered from the buzzsprout site, the third was the additional changes we made. I'm guessing there are a lot of extraneous styles in buzzsprout.css that we could probably remove. It'd also be good to update to the latest version of tailwind (3.4.3).

Goals

• end up with two css files: djangobrew.css and tailwind-3.4.3.css
• no change in website looks or functionality (desktop/mobile)

Nice to haves

• investigate a better tailwind workflow (https://django-tailwind.readthedocs.io/? no way am I dealing with webpack anytime soon) so that the tailwind css file is as small as possible (currently 19.2 Kb so it's not actually that terrible)