body {
  margin: 0;
  background: white;
}

main {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
  padding: 32px 16px;
}

img,
video,
iframe {
  display: block;
  width: min(90vw, 900px);
  border: 0;
}

img,
video {
  height: auto;
}

iframe {
  height: 700px;
}