.pmx-document[data-source="/examples/play-deck.demo"][data-pmx-play="presentation"]
  > section[data-pmx-block]
  > :first-child {
  margin-block-start: 0;
}

.pmx-document[data-source="/examples/play-deck.demo"][data-pmx-play="presentation"]
  .play-demo-stage {
  max-width: 100%;
}