Proto is a simple HTML & SCSS rapid prototyping toolkit for responsive web design. Proto helps you knock up quick responsive layout concepts by providing a set of predefined CSS classes. All that’s needed to get going is the proto.scss file and some basic HTML.

Proto uses a combination of HTML and compiled SCSS to create your prototypes. If you’re new to SCSS there’s a quick guide for you to follow.

Proto is not a framework, it’s a small toolkit built to speed up responsive layout conceptualization.