Style HTML without writing a single class — introducing classless.css

I had a weird thought while building a docs page last month. I was writing this: class= "btn btn-primary" > Get started And I thought — why does a button need to be told it's a button? It is a button. The browser knows it. The screen reader knows it. Why doesn't the CSS? That thought turned into classless.css — a 47 KB stylesheet that makes plain, semantic HTML look great without adding a single class to your markup. What does "classless" mean? The idea is simple: instead of styling elements by