title: Set textarea width to 100% in bootstrap modal
body: <p>Was trying all possible ways, but never succeeded:</p>
  
  <pre><code>    &lt;div style="float: right"&gt;
          &lt;button type="button" value="Decline" class="btn btn-danger" data-toggle="modal" data-target="#declineModal"&gt;Decline&lt;/button&gt;
      &lt;/div&gt;
  
      &lt;!-- Modal --&gt;
      &lt;div class="modal fade" id="declineModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true"&gt;
          &lt;div class="modal-dialog"&gt;
              &lt;div class="modal-content"&gt;
                  &lt;div class="modal-header"&gt;
                      &lt;button type="button" class="close" data-dismiss="modal"&gt;&lt;span aria-hidden="true"&gt;&amp;times;&lt;/span&gt;&lt;span class="sr-only"&gt;Close&lt;/span&gt;&lt;/button&gt;
                      &lt;h4 class="modal-title" id="myModalLabel"&gt;Comment&lt;/h4&gt;
                      &lt;/div&gt;
                      &lt;div class="modal-body"&gt;
                          &lt;textarea class="form-control col-xs-12"&gt;&lt;/textarea&gt;
                      &lt;/div&gt;
                      &lt;div class="modal-footer"&gt;
                      &lt;button type="button" class="btn btn-default" data-dismiss="modal"&gt;Close&lt;/button&gt;
                      &lt;button type="button" class="btn btn-danger"&gt;Decline&lt;/button&gt;
                  &lt;/div&gt;
              &lt;/div&gt;
          &lt;/div&gt;
      &lt;/div&gt; 
  </code></pre>
  
  <p>How to make the textarea in modal-body div to cover all available space = width 100%?</p>