-webkit-user-select: none;
      background-color: rgb(236, 236, 236);
      border-left: 1px solid black;
      cursor: default;
      display: flex;
      min-width: 18px; /* workaround for flexbox and writing-mode mixing bug */
      padding: 10px 0 10px 0;
      font-size: 12px;
    }

    tab-strip > tab-strip-label {
      flex-shrink: 0;
      -webkit-writing-mode: vertical-rl;