body {
    text-align: center;
    background-color: #111;
    color: #fff;
    font-family: sans-serif;
  }
  
  canvas {
    border: 2px solid #0f0;
    background-color: #222;
    margin-top: 20px;
  }

#startButton {
  padding: 10px 20px;
  font-size: 20px;
  background-color: #0f0;
  color: black;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

#restartButton {
  padding: 10px 20px;
  font-size: 18px;
  background-color: #ff0;
  color: black;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 20px;
}

#mobile-controls {
  display: none;
  margin-top: 20px;
}

.dir-btn {
  padding: 15px 20px;
  margin: 5px;
  font-size: 24px;
  background-color: #444;
  color: #fff;
  border: none;
  border-radius: 10px;
  cursor: pointer;
}

/* 只在寬度小於 768px 裝置（手機）上顯示 */
@media (max-width: 768px) {
  #mobile-controls {
    display: block;
  }
}

#infoPanel {
  color: white;
  font-size: 20px;
  margin-top: 10px;
  display: flex;
  justify-content: space-around;
}

#startOverlay, #endOverlay {
  flex-direction: column;
  gap: 20px;
  z-index: 10;
  position: fixed;
}