/* ①～⑪ 共通：タイトル → 3問 → 目次へ戻る → 3D */
#chapter2Pane .net-divider,
#chapter2Pane .net-extra-head{
  display:block!important;
  width:100%!important;
  margin:10px 0 10px!important;
  padding:20px 22px!important;
  border:1px solid #dce8e5!important;
  border-radius:20px!important;
  background:#fff!important;
  box-shadow:none!important;
  overflow:visible!important;
}
#chapter2Pane .chapter03-quiz,
#chapter2Pane .clean-quiz-card{
  display:block!important;
  width:100%!important;
  margin:10px 0!important;
  padding:20px 22px!important;
  border:1px solid #dce8e5!important;
  border-radius:20px!important;
  background:#f8fcfb!important;
  box-shadow:none!important;
  overflow:visible!important;
}
#chapter2Pane .parent-model-actions{
  display:block!important;
  width:100%!important;
  margin:8px 0 12px!important;
  padding:0!important;
  overflow:visible!important;
}
#chapter2Pane .parent-toc-back{
  display:inline-flex!important;
  align-items:center!important;
  justify-content:center!important;
  min-height:38px!important;
  padding:8px 14px!important;
  border:1px solid #d8e6e3!important;
  border-radius:999px!important;
  background:#fff!important;
  color:#497d74!important;
  font-weight:800!important;
  text-decoration:none!important;
}
#chapter2Pane iframe[srcdoc],
#chapter2Pane iframe.chapter03-frame,
#chapter2Pane iframe.net-extra-frame{
  display:block!important;
  width:100%!important;
  height:355px!important;
  min-height:355px!important;
  max-height:355px!important;
  margin:0 0 22px!important;
  border:1px solid #dce8e5!important;
  border-radius:20px!important;
  background:#f4faf8!important;
  overflow:hidden!important;
}

/* 3問 card: same 3-column appearance as ① on wider screens */
#chapter2Pane .clean-quiz-title{
  font-size:22px!important;
  font-weight:700!important;
  margin-bottom:14px!important;
}
#chapter2Pane .clean-quiz-grid{
  display:grid!important;
  grid-template-columns:repeat(3,minmax(0,1fr))!important;
  gap:12px!important;
}
#chapter2Pane .clean-quiz-item{
  min-height:120px!important;
  padding:15px 16px!important;
  border:1px solid #dce8e5!important;
  border-radius:16px!important;
  background:#fff!important;
}
#chapter2Pane .clean-answer-btn{
  margin-top:14px!important;
  min-height:44px!important;
  padding:9px 18px!important;
  border-radius:999px!important;
}

@media(max-width:700px){
  #chapter2Pane .net-divider,
  #chapter2Pane .net-extra-head{
    margin:7px 0!important;
    padding:13px 14px!important;
    border-radius:16px!important;
  }
  #chapter2Pane .chapter03-quiz,
  #chapter2Pane .clean-quiz-card{
    margin:7px 0!important;
    padding:12px!important;
    border-radius:16px!important;
  }
  #chapter2Pane .clean-quiz-title{font-size:18px!important;margin-bottom:8px!important}
  #chapter2Pane .clean-quiz-grid{
    grid-template-columns:repeat(3,minmax(0,1fr))!important;
    gap:6px!important;
  }
  #chapter2Pane .clean-quiz-item{
    min-height:100px!important;
    padding:8px!important;
  }
  #chapter2Pane .clean-quiz-item p{font-size:12px!important;line-height:1.4!important}
  #chapter2Pane .parent-model-actions{margin:6px 0 8px!important}
  #chapter2Pane iframe[srcdoc],
  #chapter2Pane iframe.chapter03-frame,
  #chapter2Pane iframe.net-extra-frame{
    height:345px!important;
    min-height:345px!important;
    max-height:345px!important;
    border-radius:16px!important;
    margin-bottom:16px!important;
  }
}