body {
  background: #f8f9fa;
}

.quiz-panel {
  background: #fff;
  border: 1px solid rgba(0, 0, 0, .125);
  border-radius: .5rem;
  padding: 1rem;
}

.answer-option {
  border: 1px solid #dee2e6;
  border-radius: .5rem;
  padding: .75rem;
}

.answer-option.correct {
  border-color: #198754;
  background: #d1e7dd;
}

.answer-option.wrong {
  border-color: #dc3545;
  background: #f8d7da;
}

@media (min-width: 768px) {
  .quiz-panel {
    padding: 1.5rem;
  }
}