body {
  font-family: courier monospace;
  background-color: black;
  color: #00ff00;
}

body > div {
  margin: 40px auto;
  flex-grow: 1;
  color: #00ff00;
}

div .image {
  border: 3px solid #00ff00;
  min-width: 30%;
  background-color: #222222;
  margin: auto;
}

div .pdf {
  border: 3px solid #00ff00;
  min-width: 30%;
  background-color: #222222;
  margin: auto;
}

div > video {
  border: 3px solid #00ff00;
  min-width: 30%;
  background-color: #222222;
  margin: auto;
}
div > audio {
  border: 3px solid #00ff00;
  min-width: 30%;
  background-color: #222222;
  margin: auto;
}
div > pre {
  border: 3px solid #00ff00;
  min-width: 30%;
  background-color: #222222;
  margin: auto;
}
figcaption {
  background: #00ff00;
  color: #000000;
}

img {
  width: auto;
  height: auto;
}