.cert_field {
    padding-top: 0;
    padding-bottom: 0;
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    height: 140px;
    *height: 136px;
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    font-size: 100px;
    text-align: center;
    font-weight: 900;
  }
  