.opac-portlet.opac-download-portlet .opac-download-label-column,
.opac-portlet.opac-download-portlet .opac-download-value-column{
  margin-bottom: 10px;
}

.opac-portlet.opac-download-portlet .custom-download .opac-button{
  display: inline-block;
  min-width: 70px;
}