Reduce CSS size by eliminating unused bits of Bulma

[Simon Willison]

https://css-tricks.com/how-do-you-remove-unused-css-from-a-site/ is a useful guide to doing this.

I'm seeing promising results from https://purifycss.online/ by pasting in these two URLs (to ensure I get the "permanently closed" styles): https://www.niche-museums.com/ and https://www.niche-museums.com/browse/museums/3