Working with classes is great for maintaining and applying the same set of styles across elements. But sometimes, managing subtle style variations between classes can be a pain. 

Today, that gets a lot easier, because now you can quickly duplicate classes and make a few tweaks, without messing up your original class, or creating a combo class. Let's take a quick look at this update in action:

This makes it a whole lot easier to create variations on elements that share a lot of styles, like buttons, for example.