body {
  font-family: sans-serif;
  font-size: 3vmin;
  color: white;
  background-color: black;
}

div {
  margin: 1em;
  padding: 1em;
  border: 1px solid #333;
  border-radius: 1em;
}

img,
video {
  max-width: 100%;
  max-height: 80vh;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

form {
  display: inline;
}

button {
  font-size: 1.5em;
  background-color: #BBB;
  border-radius: 0.5em;
}

a {
  color: #888;
}

@media (orientation: landscape) {
  button {
    font-size: 1em;
  }
}

@media (min-width: 1500px) {
  body {
    font-size: 1.25em;
  }
}

@media (orientation: portrait) and (min-width: 1000px) {
  body {
    font-size: 1.25em;
  }

  button {
    font-size: 1em;
  }
}