title: CSS style - percentage vs em vs px?
body: <p>After reading several articles on the web I´m a bit confused about when to use <code>percent</code>, <code>em</code> or <code>px</code> for <code>div´s</code>, <code>input´s</code>, <code>font´s</code>, <code>buttons</code> and so on... </p>
  
  <p>For the site I´m working on we wan´t to add a responsive design, and from what I understand from different articles than percent is the way to go for <code>elements</code> and <code>div´s</code>. But than I get confused because I´m thinking that I should be able to get a responsive design even if I use <code>px</code> för layout and than set different width, height in <code>px</code> depending on device/screen resolution...? </p>
  
  <p>And is there a best practice for when to use what? And not only for fontsize, but for <code>div´s</code> and another elements as well?</p>