.quiz-card {
  border: 1px solid #e1e3e9;
  border-radius: 8px;
  padding: 12px 16px;
  margin: 14px 0;
  background: #fff;
}
.quiz-q {
  font-weight: 600;
  margin-bottom: 8px;
}

.quiz-choices {
  list-style: none;
  margin: 8px 0;
  padding: 0;
  counter-reset: quiznum; /* カウンターをリセット */
}

.quiz-choices li {
  position: relative;
  padding-left: 42px;
  margin-bottom: 6px;
  counter-increment: quiznum; /* 各項目で+1 */
}

.quiz-choices li::before {
  content: "（" counter(quiznum) "）"; /* 番号を出力 */
  position: absolute;
  left: 0;
  color: #3B6BB3;
  font-weight: bold;
}

.quiz-btn {
  margin-top: 6px;
  margin-right: 6px;
  padding: 4px 10px;
  font-size: 0.9em;
  border: none;
  border-radius: 4px;
  background: #3B6BB3;
  color: #fff;
  cursor: pointer;
}
.quiz-btn:hover {
  opacity: 0.9;
}
.quiz-hint, .quiz-answer {
  margin-top: 8px;
  padding: 8px;
  border-left: 3px solid #3B6BB3;
  background: #f5f9ff;
}

.quiz-description {
  margin-top: 16px;
  padding: 16px;
  border-radius: 16px;
  border: 1px solid #B0E6CF;
  background: #F2FFF2;
  font-size: 0.9em;
}