.actividades-red-udg {
  text-align: center;
  margin: 20px 20px 20px 20px;
}

.views-field.views-field-field-cartel.actividades-red-udg {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.views-row.clearfix.row-1 {
    background-color: lightgrey;
    margin-bottom: 15px;
}

.views-row.clearfix.row-2 {
    margin-bottom: 15px;
}

.views-row.clearfix.row-3 {
    background-color: lightgrey;
    margin-bottom: 15px;
}