Share CSS styles

[oliverjam]

https://github.com/fac-23/nom-nom-app/blob/68c1cfe5a741d7ffa81688f0d56038c60ff45703/public/styles.css#L51

Classnames don't have to be unique—if you want several different things to look like a button it might make sense to make a generic CSS component with a class like .btn or .button, then apply this to anything that needs to look button-y. It's totally fine to have multiple classes composed together, so if you need to specifically override a bit of e.g. .link-leave-review you can still do <a class="button link-leave-review">