404.jade

doctype
html(lang='en')
  head
    meta(charset='utf-8')
    title Page Not Found
    meta(name='viewport', content='width=device-width, initial-scale=1')
    style.
      * {
      line-height: 1.2;
      margin: 0;
      }
      html {
      color: #888;
      display: table;
      font-family: sans-serif;
      height: 100%;
      text-align: center;
      width: 100%;
      }
      body {
      display: table-cell;
      vertical-align: middle;
      margin: 2em auto;
      }
      h1 {
      color: #555;
      font-size: 2em;
      font-weight: 400;
      }
      p {
      margin: 0 auto;
      width: 280px;
      }
      @media only screen and (max-width: 280px) {
      body, p {
      width: 95%;
      }
      h1 {
      font-size: 1.5em;
      margin: 0 0 0.3em;
      }
      }
  body
    h1 Page Not Found
    p Sorry, but the page you were trying to view does not exist.
// IE needs 512+ bytes: http://blogs.msdn.com/b/ieinternals/archive/2010/08/19/http-error-pages-in-internet-explorer.aspx