What's this? It's a collection of PSDs with predetermined grids for common design scenarios. Each template contains a columnar grid defined with guides and overlays.
Mixins Mixins are basically supercharged includes for CSS, allowing you to combine a set of rules into one. They're great for vendor prefixed properties like -webkit-box-shadow , gradients, and more.
Aren't you just bored with all those slides-based presentations?
It's an ultramodern CSS-Framework which comes with common magazine design elements such as pagination , gutters and of course a basic grid .
Responsive web design, as described/defined by Ethan Marcotte anyway, is the act of creating various forms of the same basic site design that are optimized for different ranges of browser window widths.