body {
  font-family: sans-serif;
  text-align: center;
  padding: 20px;
}

#quiz-image {
  width: 90vw;
  margin-bottom: 20px;
}

.answer-btn {
  display: block;
  margin: 5px auto;
  padding: 10px 20px;
  font-size: 24px;
  width: 50vw;
  height: 10vw;
  cursor: pointer;
}

.correct {
  background-color: #4CAF50;
  color: white;
}

.incorrect {
  background-color: #f44336;
  color: white;
}