Responsive Design is not the same as mobile design. Mobile design entails creating an entirely new website or web app with content specifically created for the mobile experience. Responsive Design, on the other hand, means that the same domain, the same content, and the same syntax — more or less manipulated by JavaScript and/or CSS3 Media Queries — respond to different viewports to ....read more at UGurus.com.

Responsive design is an approach to web page creation that makes use of flexible layouts, flexible images and cascading style sheet media queries. The goal of responsive design is to build web pages that detect the visitor’s screen size and orientation and change the layout accordingly.- WhatIs.com

Responsive Web Demo