.dfp-ad.leaderboard-top-1 {
  width: 320px;
  height: 50px;
  margin: 0 auto;
}

@media screen and (min-width: 992px) {
  .dfp-ad.leaderboard-top-1 {
    width: 728px;
    height: 90px;
  }
}

.dfp-ad {
  margin-bottom: 1rem;
}