This is a file I insertered directly on Github

Responsive web design is no doubt a big thing now. If you still not familiar with responsive design, check out the list of responsive sites that I recently posted. To newbies, responsive design might sound a bit complicated, but it is actually simpler than you think. To help you quickly get started with responsive design, I've put together a quick tutorial. I promise you can learn about the basic logic of responsive design and media queries in 3 steps (assuming you have the basic CSS knowledge).