.input-daterange .input-group-addon {
    padding: 9px 10px 0px 10px;
    font-size: 14px;
    font-weight: 400;
    line-height: 1;
    color: #555;
    text-align: center;
    background-color: #eee;
    border: 1px solid #ccc;
    margin-left: -1px !important;
    margin-right: -1px !important;
  }
  
  .input-group-addon, .input-group-btn {
    width: 1%;
    white-space: nowrap;
    vertical-align: middle;
  }