It's a collection of CSS styles and Javascript add-ons that stop your site from looking like a shitty craigslist rip off from 1996. Seriously, who wants that?
Docs: CSS, Components, Javascript
Finding the right gem, keeping it updated, and learning the syntax is a pain in the ass. Why not install Bootstrap the way you'd install new javascript libraries?
- Cut a hole in that box...ahem. Download Bootstap 3.0 here
- Copy everthing in Bootstrap/dist/css/min to RAILS_APP_DIR/vendor/assests/stylesheets
- Copy everthing in Bootstrap/dist/js/min to RAILS_APP_DIR/vendor/assests/javascripts
- Add
*= require bootstrap-theme.min.css
to application.css - Add
*= require bootstrap.min.css
to application.css - Add
//= require bootstrap.min.js
to application.js - ....
- PROFIT
Go over the docs to see how you can pretty-fy the divs / headers you're already using. There will be some changes that will happen instantly. Happy de-uglify-ing :-]