#gameCanvas {
  display: block;
  background-color: #222;
  border: 2px solid #0ff;
}
#dialogBox {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.9);
  color: white;
  padding: 15px;
  border: 2px solid #0ff;
  display: none;
  font-family: 'Press Start 2P', monospace;
  font-size: 10px;
}
#dialogBox button {
  margin: 5px;
  font-family: 'Press Start 2P', monospace;
  font-size: 10px;
}