title: Can't place my DIV 10px from bottom
body: <p>would you have any idea why my red div (.testbox) is not placed 10px from bottom as I would like it to be and despite the <code>margin-bottom: 10px</code>? See <a href="http://jsfiddle.net/Hs977/" rel="nofollow">http://jsfiddle.net/Hs977/</a>
  Thanks for your help</p>
  
  <pre><code>body {
    background-color: rgb(255, 255, 255);
    font-family: Helvetica;
    font-size: 16px;
    font-weight: 400;
    line-height: 1.38;
    color: rgb(21, 84, 244);
    margin: 0;
    margin: 0;
      padding: 0;
      border: 0;
  }
  
  header {
    width: 100%;
    height: 600px;
    min-height: 300px;
    margin-right: auto;
    margin-left: auto;
    background-image: url('http://lorempixel.com/output/nature-q-c-1020-711-1.jpg');
    background-size: cover;
    background-position: center center;
    background-color: rgb(222, 222, 222);
  }
  
  h1 {
    width: 100%;
    margin-top: 39px;
    margin-right: auto;
    margin-left: auto;
    font-size: 37px;
    font-weight: 400;
    line-height: 1.38;
    text-align: center;
    color: rgb(0,0,0);
  }
  
  
  .blablatext {
    margin-top: 16px;
    margin-right: auto;
    margin-left: auto;
    font-weight: 400;
    line-height: 1.38;
    text-align: center;
    color: rgb(21, 84, 244);
  }
  
  .testbox {
  float: right;
  width: 200px;
  height: 90px;
  background: red;
  margin-right: 20px;
  margin-bottom: 10px;
  }
  </code></pre>