The majority of websites all use a number of common elements arranged into a finite number of patterns, as you can clearly see on sites like Pattern Tap. These common elements correspond either to a single HTML tag or a pattern of tags, such as
fieldset>form[text],form[password], or others. The Semantic CSS Framework seeks to be a foundation for creating unique semantic stylesheets. By modifying a set of variables, the Semantic CSS Framework generates CSS that styles the default elements and related patterns. Once the base CSS file is generated, the developer can modify it further to support additional features.
The Semantic CSS Framework is responsive with many mobile-first constructs to make it run quickly. It has no official grid system, though there are certainly plenty to choose from. For strong responsive grids in SASS, I recommend Singularity.gs.
The Semantic CSS Framework takes the opinions of hundreds of developers and works their best practices into code. I will continue to update the code with references to its inspiration, but some of my major influences (links to come when I launch) have been Chris Coiyer of CSS Tricks, Harry Roberts of CSS Wizardry, and Mike Lane for his excellent Twitter feed.