html * {
    font-family: verdana, arial, sans-serif;
    line-height: 150%;
  }

  div.content { max-width: 960px; margin:0 auto; }

  @media only screen and (max-width: 960px) {
    img {
      max-width: 100%;
      height: auto;
    }
    video {
      max-width: 100%;
      height: auto;
    }
    table {
      max-width: 100%;
      height: auto;
    }
  }
  
  #toc_container {
    background: #f9f9f9;
    border: 1px solid #aaa;
    font-size: small;
    display: table;
    margin-bottom: 1em;
    padding: 15px;
    width: auto;
  }

  .toc_title {
    font-weight: 700;
  }

  #toc_container li, #toc_container ul, #toc_container ul li{
    list-style: outside none none !important;
  }

  #nav {
    background: #f9f9f9;
    font-size: small;
    margin-bottom: 1em;
    padding: 15px;
  }

  #nav li, #nav ul, #nav ul li{
    list-style: outside none none !important;
  }

 #nav table {width: 100%; margin: 0; padding: 0;}

  #nav td, #nav td * {
    vertical-align: top;
    text-align: center;
  }