.ad-host:empty {
  display: none;
}

.ad-host > *:not(img) {
  width: 100%;
  height: 100%;
  max-width: 1200px;
  min-height: 90px;
  max-height: 600px;
}

.ad-host img {
  margin: auto;
}

@media only screen and (max-width: 600px) {
  .ad-host > *:not(img) {
    max-width: 370px;
  }
}