On the SitePoint blog there's a tutorial posted showing you how to create a responsive site template in Spress, a static site generator written in PHP.

You may have heard of Sculpin – a static site generator for PHP. [...] While easy to use and fast to set up, Sculpin’s development has stagnated a bit and the documentation leaves much to be desired. Spress is, in a way, its spiritual successor. Much better documentation, much more flexible configuration, much easier to extend, and just as easy to use with almost the same API and commands.

He starts by helping you set up a basic site to work with on a Homestead Improved instance. Once that's up and running (including an install of Spress) he creates the simple site and starts in on the rebuild of the Svbtle theme. He briefly explains how Spress themes work and then includes the code/layouts you'll need to reproduce the theme. The post includes a screenshot of what the end result should look like in two different browser sizes (responsive, remember).