I viewed the source of the JetBlue demo and it's pretty cool how clean the markup looks. It also seems pretty compact for what at first glance looks like a comp

I viewed the source of the JetBlue demo and it's pretty cool how clean the markup looks. It also seems pretty compact for what at first glance looks like a complex page. I'd like to see a paragraph somewhere explaining what exactly this framework is all about tho, not just a long list of features. It's a CSS framework like Bootstrap? What does it do differently than Bootstrap?