body {
  background-color: black;
  color: green;
  font-family: 'Courier New';
  font-weight: bold;
  font-size: 1.5em;
}

#container {
  margin: auto;
  width: 50%;
}

#screen, #new-mission {
  border-style: solid;
  border-color: green;
}

#screen {
  padding: 1.5em;
  height: 300px;
}

#new-mission {
  cursor: pointer;
  margin-top: 10px;
  padding: 0.5em;
  display: inline-block;
  float: right;
  width: auto;
}