body {
  margin: 0;
  background-color: #000;
  color: white;
  font-family: 'Segoe UI', sans-serif;
  text-align: center;
}

#gameCanvas {
  border: 2px solid #0ff;
  margin: 20px auto;
  display: block;
  background-color: #111;
}

button {
  padding: 10px 20px;
  margin: 10px;
  background-color: #0ff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
}

button:hover {
  background-color: #0cc;
}

#start-screen {
  margin-top: 100px;
}