body {
  font-family: Arial, sans-serif;
  background-color: #f5f5f5;
  margin: 0;
  padding: 20px;
}

h1 {
  text-align: center;
}

.quiz-container {
  max-width: 600px;
  margin: 0 auto;
  padding: 20px;
  background: #ffffff;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

#flashcard {
  margin-bottom: 20px;
}

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

#feedback {
  font-weight: bold;
  margin-top: 10px;
  color: #f44336;
  /* Red color for feedback */
}

button {
  padding: 10px 15px;
  margin: 5px 0;
  cursor: pointer;
  background-color: #4CAF50;
  color: white;
  border: none;
  border-radius: 4px;
  transition: background-color 0.3s;
}

button:hover {
  background-color: #742adb;
}

button:disabled {
  background-color: #ccc;
  /* Gray out the button when disabled */
  cursor: not-allowed;
}