By now I assume that everybody has had a little play with the SDL Tridion Reference Implementation, which means the questions are rising for sure. So let me start with spilling some of the guts of the HTML design and how that is build when you publish.
To start off, the HTML design is a responsive HTML5 design built Bootstrap, this means that you can adjust it to your own likings following the Bootstrap methodology. This includes building the HTML design with Node.js and Grunt, but let’s start off simple.