<main class="au-grid">
  <div class="container">
    <div class="row">
      <div class="col-xs-1"><span>1</span></div>
      <div class="col-xs-2"><span>2</span></div>
      <div class="col-xs-2"><span>2</span></div>
      <div class="col-xs-3"><span>3</span></div>
      <div class="col-xs-4"><span>4</span></div>
    </div>

    <div class="row">
      <div class="col-xs-6"><span>6</span></div>
      <div class="col-xs-6"><span>6</span></div>
    </div>

    <div class="row">
      <div class="col-xs-12"><