body {
  font-family: Arial, sans-serif;
  text-align: center;
  margin: 40px;
  background-color: #f8f8f8;
}

.quiz-container {
  background-color: white;
  padding: 30px;
  border-radius: 15px;
  max-width: 600px;
  margin: auto;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.hanzi {
  font-size: 40px;
  margin-bottom: 10px;
  color: red;
}

.pinyin {
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 30px;
}

.choices button {
  font-size: 18px;
  padding: 10px 30px;
  margin: 10px;
  border: none;
  border-radius: 8px;
  background-color: #e0e0e0;
  cursor: pointer;
  transition: 0.3s;
}

.choices button:hover {
  background-color: #c5e1a5;
}

.scoreboard {
  margin-top: 20px;
  font-size: 18px;
  font-weight: bold;
}

.history {
  text-align: left;
  margin-top: 30px;
  padding: 20px;
  background-color: #f0f0f0;
  border-radius: 10px;
}

.history h3 {
  margin-top: 0;
}

.history li {
  margin-bottom: 8px;
  font-size: 16px;
}