> That said, it's pretty hard to build a responsive web app without at least a little bit of JavaScript. Not really. You just need to learn the difference between `width` and `max-width`. I do UserCSS now and then and 2 of 3 sites use them wrong. That and `position: fixed` overuse. Also, use `@media (min-width)` only for layout changes, not for sizing. And also, functionality/layouting first, design after.