body {
  background-color: #000;
  color: #0f0;
  font-family: 'Courier New', Courier, monospace;
  margin: 0;
  padding: 20px;
  text-align: center;
  user-select: none;
}

.message-box {
  margin-bottom: 20px;
}

.controls {
  margin-bottom: 10px;
}

.scoreboard {
  margin-bottom: 10px;
  font-weight: bold;
  font-size: 1.2em;
}

#gameCanvas {
  background-color: #004400;
  display: block;
  margin: 0 auto;
  border: 3px solid #0f0;
  box-shadow: 0 0 10px #0f0;
  cursor: none;
}

button, select {
  background-color: #003300;
  color: #0f0;
  border: 1px solid #0f0;
  padding: 5px 10px;
  font-family: monospace;
  font-size: 1em;
  cursor: pointer;
}

button:hover, select:hover {
  background-color: #0f0;
  color: #000;
}