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1fr;gap:.7mm;align-items:start}.answer-main{font-weight:600;min-width:0}.answer-detail,.answer-steps{margin-left:6.7mm;margin-top:.12mm}.transformation-line,.answer-step{margin-top:.08mm;white-space:normal}.justification{font-family:"Noto Sans JP","Yu Gothic",Meiryo,sans-serif;font-size:.92em}.answer-page{display:none}.worksheet-root.show-answers .answer-page{display:block}
@media(max-width:820px){.app-header,.controls{margin-left:10px;margin-right:10px}.grade-groups{grid-template-columns:1fr}.sheet-page{width:100%;min-height:auto;padding:18px 14px}.sheet-header{align-items:flex-start;gap:8px}.sheet-header h2{font-size:1rem}.problem-row{font-size:.91rem}.answer-grid{grid-template-columns:1fr}.worksheet-root{margin:12px 10px 40px}.button-row button{flex:1 1 44%}.renderer-current-locked .renderer-current-locked .system-lines{white-space:normal}.renderer-current-locked .system{max-width:100%}.problem-body,.answer-main,.transformation-line{overflow-wrap:anywhere}}
@page{size:A4 portrait;margin:0}@media print{:root,body{background:#fff}.no-print{display:none!important}.empty-state{display:none!important}.worksheet-root{display:block!important;max-width:none;margin:0}.sheet-page{display:block!important;width:210mm;height:297mm;min-height:297mm;margin:0;padding:7.2mm 8.2mm;box-shadow:none;overflow:hidden;break-after:page;page-break-after:always}.sheet-page:last-child{break-after:auto;page-break-after:auto}.sheet-header{margin-bottom:1mm;padding-bottom:1.25mm}.sheet-header h2{font-size:12pt}.sheet-sub{font-size:8pt;margin-bottom:.65mm}.problem-list{gap:0}.problem-row{font-size:8.1pt;line-height:1.1;grid-template-columns:5.8mm 1fr}.write-space{margin-left:6.8mm}.worksheet-problem.ws-1 .write-space{height:3.6mm}.worksheet-problem.ws-2 .write-space{height:7.2mm}.worksheet-problem.ws-3 .write-space{height:10.8mm}.answer-grid{column-gap:3.8mm;row-gap:.08mm}.answer-item{font-size:6.75pt;line-height:1.04;padding:.18mm 0 .28mm}.answer-detail,.answer-steps{margin-left:6mm;margin-top:.03mm}.transformation-line,.answer-step{margin-top:.02mm}.renderer-current-locked .renderer-current-locked .system-brace{font-size:2.2em}}

/* Formal renderer integration v1 */
.math-render-v1{white-space:nowrap}.math-render-katex .katex{font-size:1.04em}.formal-answer-detail{margin-top:.12mm}


/* Light Page-shell v0.1 — screen-only outer shell. Generator selectors remain untouched. */
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.public-identity{padding-top:24px;margin-bottom:20px}
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.public-identity h1{margin:0;font-size:28px;font-weight:700;line-height:1.4;letter-spacing:-.01em}
.public-identity .public-support{max-width:760px;margin:8px 0 0;font-size:16px;line-height:1.65;color:#4b5563}
.public-identity .fact-cues{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 0;padding:0;list-style:none}
.public-identity .fact-cues li{padding:5px 10px;border-radius:999px;background:#f4f8ff;color:#1e40af;font-size:14px;font-weight:600;line-height:1.4;border:1px solid #dbe7fb}
.sample-shell{margin-top:24px}
.sample-disclosure{border-top:1px solid #d8e0e8;border-bottom:1px solid #d8e0e8;background:#fff}
.sample-disclosure summary{display:flex;align-items:center;min-height:48px;padding:10px 4px;font-size:16px;font-weight:600;line-height:1.5;color:#1d4ed8;cursor:pointer;list-style-position:inside}
.sample-disclosure summary:hover{text-decoration:underline;text-underline-offset:3px}
.sample-disclosure summary:focus-visible{outline:3px solid #1d4ed8;outline-offset:3px;border-radius:4px}
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.sample-expanded h2{margin:8px 0 16px;font-size:20px;line-height:1.5}
.sample-pair{display:flex;justify-content:center;align-items:flex-start;gap:28px;max-width:520px;margin:0 auto}
.sample-pair figure{width:min(220px,44%);margin:0}
.sample-pair figcaption{margin-bottom:8px;font-size:14px;font-weight:700;line-height:1.4}
.sample-pair img{display:block;width:100%;height:auto;aspect-ratio:210/297;object-fit:cover;object-position:top;background:#fff;border:1px solid #d8e0e8;border-radius:6px;box-shadow:0 3px 12px rgba(17,24,39,.08)}
.sample-caption{margin:16px auto 0;max-width:520px;font-size:14px;line-height:1.55;color:#4b5563}
.trust-footer{margin-top:44px;margin-bottom:32px;padding:22px 0;border-top:1px solid #d8e0e8;color:#4b5563}
.trust-footer p{margin:0;font-size:14px;line-height:1.65}
@media(max-width:959px){.public-shell{width:calc(100% - 40px)}}
@media(max-width:599px){.public-shell{width:calc(100% - 32px)}.public-identity{padding-top:16px;margin-bottom:16px}.public-identity .service-name{font-size:17px}.public-identity h1{font-size:24px;line-height:1.4}.public-identity .public-support{font-size:15px}.sample-shell{margin-top:20px}.sample-pair{flex-direction:column;align-items:center;gap:20px}.sample-pair figure{width:min(220px,100%)}.trust-footer{margin-top:40px}.sample-disclosure summary{min-height:48px}}
@media print{.public-shell{display:none!important}}