// Minimal quiz widget — shared across lessons
document.addEventListener('DOMContentLoaded', () => {
  document.querySelectorAll('.quiz').forEach(quiz => {
    const radios = quiz.querySelectorAll('input[type="radio"]');
    const feedbackCorrect = quiz.querySelector('.feedback.correct');
    const feedbackWrong = quiz.querySelector('.feedback.wrong');

    radios.forEach(radio => {
      radio.addEventListener('change', () => {
        if (feedbackCorrect) feedbackCorrect.style.display = 'none';
        if (feedbackWrong) feedbackWrong.style.display = 'none';

        if (radio.dataset.correct === 'true') {
          if (feedbackCorrect) feedbackCorrect.style.display = 'block';
        } else {
          if (feedbackWrong) feedbackWrong.style.display = 'block';
        }
      });
    });
  });
});