.chapter03-quiz{
  margin:0 18px 20px;padding:20px;border:1px solid rgba(36,52,49,.10);
  border-radius:22px;background:linear-gradient(135deg,#fffdf8,#eef8f5)
}
.chapter03-quiz h2{margin:0 0 6px;font-size:1.35rem}
.chapter03-quiz .quiz-lead{margin:0 0 15px;color:#71807b;font-size:.92rem}
.quiz-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.quiz-item{padding:16px;border-radius:17px;background:#fff;border:1px solid #dfe8e5;box-shadow:0 7px 18px rgba(45,70,65,.05)}
.quiz-no{display:inline-block;margin-bottom:8px;padding:4px 9px;border-radius:999px;background:#243431;color:#fff;font-size:.76rem;font-weight:800}
.quiz-item p{margin:0;font-weight:800;line-height:1.7}
.quiz-answer{display:none;margin-top:11px;padding-top:10px;border-top:1px dashed #cbd8d4;color:#34756d;font-weight:900}
.chapter03-quiz.show-answers .quiz-answer{display:block}
.answer-btn{margin-top:14px;border:0;border-radius:999px;padding:10px 16px;background:#5da9a0;color:#fff;font-weight:800;cursor:pointer}
@media(max-width:760px){.chapter03-quiz{margin:0 10px 14px;padding:14px}.quiz-grid{grid-template-columns:1fr}.quiz-item{padding:14px}}