.clean-quiz-card{
 margin:8px 0;padding:12px 14px;border:1px solid #dce8e5;border-radius:18px;background:#fff;
}
.clean-quiz-title{font-size:19px;font-weight:800;color:#315b54;margin-bottom:9px}
.clean-quiz-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.clean-quiz-item{padding:9px 10px;border:1px solid #dce8e5;border-radius:13px;min-height:86px}
.clean-quiz-item span{font-size:12px;color:#62a79e;font-weight:800}
.clean-quiz-item p{font-size:13px;line-height:1.45;margin:4px 0}
.clean-quiz-item b{display:none;font-size:12px;color:#497d74}
.clean-quiz-card.show-answer .clean-quiz-item b{display:block}
.clean-answer-btn{margin-top:7px!important;min-height:34px!important;padding:6px 13px!important;border-radius:999px!important}
#chapter2Pane iframe[srcdoc]{
 height:300px!important;min-height:300px!important;max-height:300px!important;
 overflow:hidden!important;margin:7px 0 12px!important;
}
@media(max-width:700px){
 .clean-quiz-card{padding:9px 10px;margin:6px 0}
 .clean-quiz-title{font-size:16px;margin-bottom:6px}
 .clean-quiz-grid{grid-template-columns:1fr;gap:4px}
 .clean-quiz-item{min-height:0;padding:6px 8px}
 .clean-quiz-item p{font-size:12px;margin:2px 0;line-height:1.35}
 #chapter2Pane iframe[srcdoc]{height:285px!important;min-height:285px!important;max-height:285px!important}
}