The core of any Responsive Web Design framework is the media query. Media queries are what enable your website to call different style declarations from your stylesheets based on the current window width of the viewing device. Many of those new to Responsive Web Design, RWD, don’t spend time getting familiar with them.
When there are great frameworks like The Semantic Grid System, Foundation by Zurb, and Twitter Bootstrap that let everyone just pick up and go, why would they bother? Right? Wrong! Having a skill that solely relies on code created by another is a hindrance to your career, in order to be able to say something is part of your skill set you have to understand it first. That is why for all those claiming to have an in-depth knowledge of RWD, we’ll be taking an extended look at it’s backbone: media queries.