title: CSS box-sizing: border-box still adding border size to element width
body: <p>The following example is to demonstrate the problem I'm having.</p>
  
  <p>So if I have a 200px wide container</p>
  
  <p>I add a 200px wide row in the container (will add lots of rows)</p>
  
  <p>I want to add div's to the row that total 200px (different each row)</p>
  
  <p>All works fine until I add in the 1px solid border to the .cont div.</p>
  
  <p>Why is the box-sizing not accounting for the .cont border?</p>
  
  <p>[Edit] the three .cell divs do not show with the border added, without the border all three .cell divs display. [/Edit] </p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>*,
  *:before,
  *:after {
    -webkit-box-sizing: border-box !important;
    -moz-box-sizing: border-box !important;
    -ms-box-sizing: border-box !important;
    box-sizing: border-box !important;
  }
  
  .cont {
    position: absolute;
    background-color: white;
    font-size: 12px;
    overflow: hidden;
    border: solid;
    /* Remove this and it works */
    border-color: purple;
    border-width: 1px;
    height: 200px;
    width: 200px;
    margin: 0;
    padding: 0;
  }
  
  .h_row {
    display: block;
    width: 100%;
    height: 22px;
    line-height: 22px;
    background-color: red;
    overflow: hidden;
    border-bottom: solid;
    border-bottom-color: orange;
    border-width: 1px;
    margin: 0;
    padding: 0;
  }
  
  .cell {
    display: block;
    float: left;
    font-size: 11px;
    height: 20px;
    line-height: 20px;
    text-align: left;
    text-indent: 2px;
    overflow: hidden;
    margin: 0;
    padding: 0;
  }
  
  .h_row&gt;.cell {
    font-size: 12px;
    text-align: center;
    height: 22px;
    line-height: 22px;
    border-right: solid;
    border-right-color: pink;
    border-right-width: 1px;
    background-color: green;
  }
  
  .h_row&gt;.cell:last-child {
    border-right: none;
  }
  
  .w50 {
    width: 50px;
  }
  
  .w100 {
    width: 100px;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="cont"&gt;
    &lt;div class="h_row"&gt;
      &lt;div class="cell w100"&gt;100&lt;/div&gt;
      &lt;div class="cell w50"&gt;50&lt;/div&gt;
      &lt;div class="cell w50"&gt;50&lt;/div&gt;
    &lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>