body {
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  padding: 20px;
  text-align: center;
}

#game {
  max-width: 500px;
  margin: auto;
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px #ccc;
}

button {
  margin: 5px;
  padding: 10px 20px;
  font-size: 16px;
}

.hidden {
  display: none;
}

#progressBar {
  width: 100%;
  height: 10px;
  background: #ddd;
  margin-top: 20px;
  border-radius: 5px;
}

#progress {
  width: 0%;
  height: 100%;
  background: #4caf50;
  border-radius: 5px;
}