html,
body {
  height: 100%;
}

body {
  margin: 0;
  background-color: Canvas;
}

.content {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
  box-sizing: border-box;
}

.content iframe {
  max-width: 100%;
  border: 0;
}