vertical-align: top;
      }

      table > tbody:focus {
        outline: none;
      }
      table > tbody:focus[selection-mode="row"] > tr[selected],
      table > tbody:focus[selection-mode="cell"] > tr > td[selected],
      table > tbody:focus > tr.empty-row > td {
        outline: 1px dotted #666666;
        outline-offset: -1px;
      }

      button.toggle-button {
        height: 15px;