title: Invalid property value for align-text css
body: <p>I have set the <code>text-align:none;</code> for both body and my list.</p>
  
  <pre><code>body {
      background-color: #fff;
      color: #333;
      font-size: 13px;
      line-height: 18px;
      position:relative;
      padding:0;
      margin:0;
      text-align:none;
      font-family: arial, verdana, helvetica, sans-serif;
  }
  
  #nav .menu{
      background:#F27739;
      background:-webkit-gradient(linear, left top, left bottom,
      from(#F27739),to(#D95B1C));
      overflow:hidden;
      margin-top:50px;
      height:30px;
      text-align:none;
  }
  </code></pre>
  
  <p>But in <a href="https://getfirebug.com/" rel="nofollow noreferrer">Firebug</a> I detected that both of these <code>text-align:none;</code> are invalid property values. I don't understand, why? </p>