Shipd Style is a responsive design CSS framework. It is culled from 3 years of repeatedly crafting mobile first designs, that layered on tablet and desktop functionality. With several great organizations, we reinvented this wheel. Each time it got more round and simple.
The framework foundation is based on Stubornella's awesome OOCSS, which separates concerns of box width from those of box padding & margin. This makes dealing with the IE box model differences pretty trivial. Developers need to get in the habit and discipline of always creating a nested div for padding, border and margin. But once that habit is well understood, designing is easy.
On top of that box model and grid managment system, we added a responsive design framework. There are a set of sizes defined for the base case (mobile), and then additional sizes for tablet and desktop. Front-end developers can change the size of element per layout. In mobile, a container can show up at the bottom of the page, and in other layouts it can be a side-menu. This page is one of those examples. The basic work can be done with markup and styling classes alone.