.quiz {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.quiz-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: flex-end;
  margin-top: 12px;
}

.question {
  background: #ffffff;
  border: 1px solid #d9d9d9;
  border-radius: 16px;
  padding: 16px;
}

.question h3 {
  margin: 0 0 10px;
}

.choices {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.choices label {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
}

.choices input {
  accent-color: #0b6e4f;
}

.question.checked .choices label.correct {
  border-color: #1a7f37;
  background: #e6f4ea;
}

.question.checked .choices label.incorrect {
  border-color: #b42318;
  background: #ffe8e6;
}

.explain {
  display: none;
  margin-top: 12px;
  color: #5a5f6a;
}

.question.checked .explain {
  display: block;
}

.source {
  font-size: 0.85rem;
  color: #7a7f89;
}