body {
  background-color: black;
  color: green;
  font-family: Arial, sans-serif;
  text-align: center;
  margin-top: 50px;
}

h1 {
  color: limegreen;
}

#compBox, #userBox {
  display: inline-block;
  width: 100px;
  height: 50px;
  border: 2px solid green;
  background-color: black;
  color: limegreen;
  line-height: 50px;
  font-size: 20px;
  font-weight: bold;
  margin: 10px;
}

p {
  font-size: 18px;
}

input {
  background-color: black;
  border: 2px solid green;
  color: limegreen;
  padding: 5px;
  font-size: 16px;
  text-align: center;
}

button {
  background-color: green;
  color: black;
  border: none;
  padding: 8px 15px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  margin-top: 10px;
}

button:hover {
  background-color: limegreen;
}

#message {
  font-size: 24px;
  font-weight: bold;
  color: limegreen;
  display: none; 
  margin-top: 20px;
  cursor: cursor;
}