I can make for you a 12-column grid system with Susy (SASS/CSS). It's highly responsive with dual mobile mode - portrait and landscape, no problemo! Plus tablet, desktop/laptop and retina screen responsiveness come all in one package. Everything in between is also adjusted to avoid breaking the content view and overall page layout due to Susy's flexibility. And I'll be happy to further assist you after the task's completion. I'm an experienced personnel with 2 years in the industry. Skillset: Javascript, HTML5, CSS3, PHP, code semantics, documentation, Android app dev.