Simple, sleek looking dropdown menu effect achieved using pure CSS. This responsive header solution is purposefully basic in its design. And interactive which can easily adjust in your original page where the menu it creates is rather attractive and competes. A basic but bulletproof responsive dropdown multi-level responsive menu. Even though this is an excellent solution, we won’t use it in our example. See the Pen Simple Pure CSS Dropdown Menu by connorbrassington (@connorbrassington) on CodePen. See the Pen Responsive Dropdown Navigation Bar. Html Css/SCSS Javascript Author. This kind of menu layout also best suits for websites with fewer web pages. A small bit of styling is applied to the nested uls.