html {
  font: normal 16px/1.5 sans-serif;

  #nav {
    display: block;
    width: 960px;
    height: 140px;
    padding: 10px;
    background0color: lightblue;

  }


  #header {
    display: block;
    width: 960px;
    height: 140px;
    padding: 10px;
    background0color: lightblue;

  }



  code {
    color: blueviolet;
    font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;

  }