angled headers

table.html

<div class="scrollable-table">
  <table class="table table-striped table-header-rotated">
    <thead>
      <tr>
        <!-- First column header is not rotated -->
        <th></th>
        <!-- Following headers are rotated -->
        <th class="rotate-45"><div><span>Column header 1</span></div></th>
        <th class="rotate-45"><div><span>Column header 2</span></div></th>
        <th class="rotate-45"><div><span>Column header 3</span></div></th>
        <th class="rotate-45"><div><span>Column header 4</span></div></th>
        <th class="rotate-45"><div><span>Column header 5</span></div></th>
        <th class="rotate-45"><div><span>Column header 6</span></div></th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <th class="row-header">Row header 1</th>
        <td><input checked="checked" name="column1[]" type="radio" value="row1-column1"></td>
        <td><input checked="checked" name="column2[]" type="radio" value="row1-column2"></td>
        <td><input name="column3[]" type="radio" value="row1-column3"></td>
        <td><input name="column4[]" type="radio" value="row1-column4"></td>
        <td><input name="column5[]" type="radio" value="row1-column5"></td>
        <td><input name="column6[]" type="radio" value="row1-column6"></td>
      </tr>
      <tr>
        <th class="row-header">Row header 2</th>
        <td><input name="column1[]" type="radio" value="row2-column1"></td>
        <td><input name="column2[]" type="radio" value="row2-column2"></td>
        <td><input checked="checked" name="column3[]" type="radio" value="row2-column3"></td>
        <td><input checked="checked" name="column4[]" type="radio" value="row2-column4"></td>
        <td><input name="column5[]" type="radio" value="row2-column5"></td>
        <td><input name="column6[]" type="radio" value="row2-column6"></td>
      </tr>
      <tr>
        <th class="row-header">Row header 3</th>
        <td><input name="column1[]" type="radio" value="row3-column1"></td>
        <td><input name="column2[]" type="radio" value="row3-column2"></td>
        <td><input name="column3[]" type="radio" value="row3-column3"></td>
        <td><input name="column4[]" type="radio" value="row3-column4"></td>
        <td><input checked="checked" name="column5[]" type="radio" value="row3-column5"></td>
        <td><input checked="checked" name="column6[]" type="radio" value="row3-column6"></td>
      </tr>
    </tbody>
  </table>
</div>