This is a good place to pause our exploration of the Bedrock and Bootstrap customization system. There's a lot more that could be done, and you can of course use regular CSS selectors to customize any aspect of the theme that you desire. But I hope that this introduction to the SASS customization system within Bootstrap will make it clear that you can make sweeping, wholesale changes to your theme with just a couple lines of code.
Download the Source
The source for this, and all other Bedrock theme work described in this section, can be found on GitHub in https://github.com/concrete5/theme_bedrock_documentation.