title: CSS column-count doesn't fill the whole area
body: <p>I'm trying to display items in 8 columns with css3 rule <code>column-count</code>. However, sometimes it shows 6, sometimes 7. I tried to set a specific width for the items, and nothing seems to work.</p>
  
  <p><a href="https://jsfiddle.net/yh4yvoe3/" rel="nofollow">Click here to see the Fiddle</a></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>body {margin: 0;}
  .container {
    margin: auto;
    padding: 0 15px;
    background: #eee;
  }
  @media (min-width: 768px) {
    .container {width: 750px;}
  }
  @media (min-width: 992px) {
    .container {width: 970px;}
  }
  @media (min-width: 1200px) {
    .container {width: 1170px;}
  }
  .brick-wall {
    -webkit-column-gap: 0;
    -webkit-column-fill: balance;
    -moz-column-gap: 0;
    -moz-column-fill: balance;
    column-gap: 0;
    column-fill: balance;
    -webkit-column-count: 8;
    -moz-column-count: 8;
    column-count: 8;
  }
  .brick {
    -webkit-column-break-inside: avoid;
    -moz-column-break-inside: avoid;
    column-break-inside: avoid;
    text-align: center;
  }
  .brick-wall .brick .brick-content {
    border: 1px solid #000;
    display: inline-block;
    vertical-align: top;
    width: 95%;
    margin: 5px 0;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="container"&gt;
    &lt;div class="brick-wall"&gt;
      &lt;script type="text/javascript"&gt;
        for(i = 0;i &lt; 17;i++) document.write('&lt;div class="brick"&gt;&lt;div class="brick-content"&gt;&lt;br/&gt;' + (i + 1) + '&lt;br/&gt;&lt;/div&gt;&lt;/div&gt;');
      &lt;/script&gt;
    &lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>