CSS’ simplicity has always been one of its most welcome features. But as our sites and apps get bigger and become more complex, and target a wider range of devices and screen sizes, this simplicity—so welcome as we first started to move away from font tags and table-based layouts—has become a liability. Fortunately, a few years ago developers Hampton Catlin and Nathan Weizenbaum created a new style sheet syntax with features to help make our increasingly complex CSS easier to write and manage—and then used a preprocessor to translate the new smart syntax into the old, dumb CSS that browsers understand. Learn how Sass (“syntactically awesome style sheets�) can help simplify the creation, updating, and maintenance of powerful sites and apps.