body {
  font-family: "Microsoft JhengHei", sans-serif;
  background-color: #f0f4f8;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.game-container {
  background: white;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 0 10px rgba(0,0,0,0.2);
  text-align: center;
}

input[type="number"] {
  padding: 10px;
  width: 100px;
  margin-right: 10px;
  font-size: 16px;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
}

#message {
  margin-top: 20px;
  font-size: 18px;
  font-weight: bold;
}