body {
  font-family: sans-serif;
  font-size: 2em;
}

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

form {
  display: inline-block;
}

button {
  font-size: 1.5em;
}

a {
  color: #888;
}