title: Why doesn't my PrimeFaces app look the same as the showcase?
body: <p>I use PrimeFaces 8 and I can't get the same design as that of showcase. Which CSS should I declare?</p>
  
  <h2>My application</h2>
  
  <p><img src="https://i.stack.imgur.com/7ARCo.png" /></p>
  
  <h2>Showcase</h2>
  
  <p><img src="https://i.stack.imgur.com/PeA2F.png" /></p>