Build a complete instant search experience in less than 15 minutes with react-instantsearch.
More resources available here
In this guide we're using create-react-app to get up and running quicker: https://github.com/facebookincubator/create-react-app
You can find CSS for this demo on github: https://github.com/algolia/examples/blob/master/instant-search/react-instantsearch/public/style.css.
There are 2 class name changes ("sidebar" and "content" are "left-column" / "right-column" in the file).
For the default widget styling you can find the file here