A basic and properly structured HTML/CSS drop down menu can serve you just as well. In fact, it may make your site appear more responsive to not use animations and instantly display the menu instead.

Responsive, flexible designs can make for complicated resizing -- after all there are a lot of elements on a page and scaling them all for different screen sizes isn't easy. But there's another ...

Tailwind packs a lot of power into a memorable and concise syntax, making it a fast-rising alternative to the likes of Bootstrap and Foundation.