If you haven’t used a precompiler before, you are about to fall in love. When you first learn CSS, you learn it stands for Cascading Style Sheets, which is pretty accurate. Whatever property you change twice, it will be overridden by the latest line. Because of this, CSS involves a lot of repetition and specification. Either via classes, IDs or selectors you have to show the browser exactly what you want to style. But what if I told you this could be easier? You could write a very specific CSS file without repeating so much. When I learned about this, I thought I was dreaming. When I learned how to do it, I promised myself I would never go back to simple CSS if I could help it.