.hidden_subcolumn {
    background: #CCC;
    display: none;
}

.showed_subcolumn {
    background: #CCC;
    display: table-cell;
    transition: display 0.1s ease-in-out;
}

.expandable {
    background: #fff;
    overflow: hidden;
    color: #000;   
    line-height: 50px;
  
    transition: all 0.1s ease-in-out;
    transform-origin: left top;
    transform: scaleY(0);
    visibility: hidden;
}

.expanded {
    transform: scaleY(1);
    visibility: visible;
}

.hiddenRow {
    padding: 0 !important;
}