/******************************** Menüzeile ************/
nav {
  border: 1px solid #e3e3e3;
  background: #aaa;
  padding: .3em;
  width: auto;
  overflow: auto;
}

ul#menu {
  padding: .3em;
  margin: 0 0 5px;
  display: block;
  overflow: auto;
}

  ul#menu li {
    padding: .3em;
    font-family: Arial,Helvetica,sans-serif;
    font-size: 1em;
    font-weight: normal;
    display: contents;
  }

  ul#menu li a {
    float:left;
    padding: .4em .3em;
  }