body {
    font-family: "Courier New", Courier, monospace;
    background-color: black;
    color: #00cc00;
    text-align: center;
  }
input[type="text"] {
    background-color: black;
    color: #00cc00;
    border: 2px solid white;
    width: 50%;
    padding: 1em;
    font-size: 1.5em;
    margin: 1em auto;
    display: block;
  }

.welcome {
  font-size: 1.5em;
}
.output {
    width: 50%;
    margin: 1em auto;
    text-align: left;
    font-size: 1.5em;
  }