body {
  background: black;
  color: #00ff00;
  font-family: monospace;
  text-align: center;
  padding-top: 50px;
}

input, button {
  font-family: monospace;
  background: #111;
  color: #0f0;
  border: 1px solid #0f0;
  padding: 5px;
  margin-top: 10px;
}