body {
  font-family: sans-serif;
  margin: 20px;
}

h1 {
  text-align: center;
}

#game-area {
  border: 1px solid #ddd;
  padding: 20px;
}

#question {
  font-size: 24px;
  margin-bottom: 10px;
}

#answer-area {
  display: flex;
  align-items: center;
}

#answer {
  width: 100px;
  padding: 5px;
  font-size: 16px;
}

#check-answer-button {
  margin-left: 10px;
  padding: 5px 10px;
  font-size: 16px;
  cursor: pointer;
}

#message {
  margin-top: 10px;
  font-size: 18px;
}

#score-area {
  margin-top: 10px;
  text-align: right;
}

#correct-count, #total-questions, #percentage {
  font-weight: bold;
}