round-color: blue;
      border-right: blue solid 1em;
      border-top: blue solid 1em;
      display: inline-block;
      height: 8em;
      vertical-align: top;
  /*
  Why 'vertical-align: top' ?
  See
  http://lists.w3.org/Archives/Public/public-css-testsuite/2014Dec/0013.html
  for explanations
  */
      writing-mode: sideways-rl;
    }

  span
    {
      display: block;
    }

  span#left-border
    {
      border-left: blue solid 1em;
    }
  ]]></style>
 </head>

 <body>

  <div>

    <div class="