.second-level-menu-item  > a, .third-level-menu-item  > a {
  background-color: transparent !important;
}

.second-level-menu-item > a, .third-level-menu-item  > a {
  padding-top: 10px !important;
  padding-bottom: 10px !important;
}

@media (min-width: 768px) {
  .second-level-menu-item > a, .third-level-menu-item  > a {
    padding-top: 15px !important;
    padding-bottom: 15px !important;
  }
}