Controlling width with CSS3 box-sizing

An incredibly useful CSS3 feature when you’re creating columns with floats is box-sizing. It lets you choose which box sizing model to use – whether or not an element’s width and height include padding and border or not.This is useful since it makes it much easier to define flexible widths where you also need padding and/or borders. A typical example is laying out forms, which can be a real pain when you want flexible widths…