body {
  background: #0f172a;
  color: white;
  font-family: Arial;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  text-align: center;
}

canvas {
  background: #1e293b;
  border: 4px solid #3b82f6;
  box-shadow: 0 0 20px rgba(59,130,246,0.6);
  display: none;
}

button {
  padding: 10px 20px;
  background: #3b82f6;
  border: none;
  color: white;
  cursor: pointer;
  border-radius: 8px;
  font-size: 16px;
}

button:hover {
  background: #2563eb;
}

.hidden {
  display: none;
}

#gameOver {
  margin-top: 10px;
}