Eons ago, in the mists of time (well the late 1990s), websites were typically built with their widths defined as percentages. These percentage-based widths fluidly adjusted to the screen viewing them and became known as fluid layouts.

In the years shortly after, in the mid to late 2000s, there was an intervening fixation on fixed width designs (I blame those pesky print designers and their obsession with pixel perfect precision). Nowadays, as we build responsive web designs we need to look back to fluid layouts and remember all the benefits they offer.

In Chapter 2, Media Queries – Supporting Differing Viewports, we ultimately conceded that while media queries allowed our design to adapt to changing viewport sizes, by snapping from one set of styles to another, we needed some ability to flex our design between the 'break points' that media queries provided. By coding a 'fluid' layout, we can facilitate this need perfectly; it will effortlessly...