I am trying to vertically and horizontally center the div banner_title within another div like this...
.box {
  text-align: center;
}
.banner_title {
  font-size: 32px;
  position: absolute;
  top: 50%;
  width: 100%;
}
.banner_title > div {
  background: rgba(0, 0, 0, 0.7) none repeat scroll 0 0;
  color: #fff;
  padding: 15px;
}<div class="box">
  <img src="http://dummyimage.com/1000x400/b895b8/fff.jpg&text=+">
  <div class="banner_title">
    <div>
      THIS MESSAGE IS A TEST MESSAGE
    </div>
    <button>
      This is a test button
    </button>
  </div>
</div>also on https://jsfiddle.net/j90gaawb/
This isn't working for me.
This is what I am trying to achieve...

 
     
     
     
    