div#webform-component-uc-category div.form-checkboxes,
div#webform-component-request-information--uc-category div.form-checkboxes
{
    max-height: 200px;
    width: 100%;
    max-width:500px;
    overflow: auto;
    margin:0;
    margin-bottom: 20px;
    border-style: solid;
    worder-width: 1px;
    border-width: 1px;
    border-color: #ccc;
}
div#webform-component-uc-category div.form-checkboxes div.form-item,
div#webform-component-request-information--uc-category div.form-checkboxes div.form-item
{
    margin:0;
    padding:0;
}

div#webform-component-uc-category div.form-checkboxes div.form-item:nth-child(even),
div#webform-component-request-information--uc-category div.form-checkboxes div.form-item:nth-child(even)
 {
  background: #eee;
}