nav.pure-menu.pure-menu-open.pure-menu-horizontal
  a#sitelink.pure-menu-heading href="/" title="Homepage"
    ' H
    span B
  ul
    li class=active_nav("/")
      ==link_to "Home", "/", title: "Home"
    li class=active_nav("/impressum.html")
      ==link_to "Impressum", "/impressum.html", title: "Impressum"
    li class=active_nav("#about")
      ==link_to "About", "#about", title: "About"