body {
  background-color: #111;
  color: limegreen;
  font-family: 'Courier New', Courier, monospace;
  padding: 20px;
}
.container {
  max-width: 800px;
  margin: auto;
}
pre {
  background-color: #000;
  padding: 10px;
  border: 1px solid limegreen;
  overflow-x: auto;
}