abindex="0" id="c1second" style="height:100px; background:red;">line</div>

  <!-- Column #2 -->

  <div tabindex="0" id="inlineBlock" style="display:inline-block; box-sizing:border-box; width:100%; height:70px; border:solid;"></div>

  <!-- Column #3 -->
  <div>
    <div style="display:flex; flex-flow:wrap row-reverse;">
      <div tabindex="0" id="flex1" style="width:30%; height:100px;">A</div>
      <div tabindex="0" id="flex2" style="width:30%;">B</div>
      <div tabindex="0" id="flex3" style="width:30