:root{--ws-navy:#0f172a;--ws-blue:#2563eb;--ws-border:#dbe4f0;--ws-soft:#f5f8fc;--ws-muted:#64748b}
.worksheet-page{background:#f6f8fb;color:var(--ws-navy)}
.worksheet-site-header{background:#fff;position:sticky;top:0;z-index:50;box-shadow:0 1px 0 rgba(15,23,42,.08)}
.worksheet-header-row{min-height:78px}
.mode-nav{border-top:1px solid #eef2f7;background:#fff}
.mode-nav-inner{display:flex;gap:8px;overflow-x:auto;padding-top:10px;padding-bottom:10px;scrollbar-width:none}
.mode-nav-inner::-webkit-scrollbar{display:none}
.mode-nav a,.mode-nav span{white-space:nowrap;text-decoration:none;border:1px solid #d9e3ef;background:#fff;color:#334155;border-radius:999px;padding:9px 14px;font-size:13px;font-weight:700;display:inline-flex;align-items:center;gap:6px}
.mode-nav a.is-active{background:#eaf2ff;border-color:#b9d0ff;color:#1d4ed8}
.mode-nav .is-disabled{color:#94a3b8;background:#f8fafc}
.mode-nav small{font-size:9px;background:#e2e8f0;border-radius:999px;padding:2px 5px}
.worksheet-main{padding:28px 0 70px}
.worksheet-wrap{max-width:1040px}
.worksheet-hero{text-align:center;padding:20px 0 26px}
.worksheet-hero .section-chip{margin-bottom:12px}
.worksheet-hero h1{font-size:clamp(32px,5vw,52px);line-height:1.18;margin:0;color:#0f172a;letter-spacing:-.03em}
.worksheet-hero h1 em{display:block;font-style:normal;font-size:.46em;color:#2563eb;margin-top:9px;letter-spacing:0}
.worksheet-hero>p{max-width:760px;margin:18px auto 0;color:#64748b;font-size:16px;line-height:1.9}
.maker-panel{padding:24px;margin-bottom:30px}
.maker-heading,.preview-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:20px}
.maker-heading h2,.preview-heading h2{font-size:27px;margin:7px 0 5px;color:#0f172a}
.maker-heading p,.preview-heading p{margin:0;color:#64748b;font-size:14px;line-height:1.7}
.step-badge{font-size:10px;font-weight:800;letter-spacing:.1em;color:#2563eb;background:#eaf2ff;border-radius:999px;padding:6px 9px}
.maker-main-btn{min-width:205px;padding:14px 18px;border-radius:14px}
.maker-options{display:grid;grid-template-columns:1fr 1.3fr;gap:16px;margin-top:22px;padding-top:20px;border-top:1px solid #edf2f7}
.option-block{background:#f8fafc;border:1px solid #e5ebf3;border-radius:16px;padding:14px}
.option-label{display:block;font-size:12px;font-weight:700;color:#64748b;margin-bottom:9px}
.segment{display:grid;grid-template-columns:1fr 1fr;background:#e9eef5;padding:4px;border-radius:12px}
.segment-btn{border:0;background:transparent;color:#64748b;padding:10px 8px;border-radius:9px;font-weight:700;cursor:pointer}
.segment-btn.is-active{background:#fff;color:#1d4ed8;box-shadow:0 2px 8px rgba(15,23,42,.08)}
.switch-row{display:flex;align-items:center;justify-content:space-between;gap:16px;background:#f8fafc;border:1px solid #e5ebf3;border-radius:16px;padding:14px 16px;cursor:pointer}
.switch-row span{display:grid;gap:3px}.switch-row b{font-size:14px}.switch-row small{color:#64748b;font-size:11px}
.switch-row input{position:absolute;opacity:0;pointer-events:none}
.switch-row i{width:48px;height:28px;border-radius:999px;background:#cbd5e1;position:relative;flex:0 0 auto;transition:.18s}
.switch-row i:after{content:"";position:absolute;left:3px;top:3px;width:22px;height:22px;background:#fff;border-radius:50%;box-shadow:0 2px 5px rgba(15,23,42,.2);transition:.18s}
.switch-row input:checked+i{background:#2563eb}.switch-row input:checked+i:after{transform:translateX(20px)}
.history-row{display:flex;align-items:center;gap:8px;margin-top:15px;color:#64748b;font-size:12px}
.history-row button{margin-left:auto;border:0;background:transparent;color:#2563eb;font-weight:700;font-size:12px;cursor:pointer}
.preview-section{margin-top:34px}
.preview-heading{margin-bottom:18px}
.secondary-btn{border:1px solid #ccd8e7;background:#fff;color:#334155;border-radius:13px;padding:11px 15px;font-weight:700;cursor:pointer}
.paper-shell{background:#e8edf4;border-radius:22px;padding:24px;box-shadow:inset 0 1px 4px rgba(15,23,42,.06)}
.a4-paper{background:#fff;width:min(100%,794px);aspect-ratio:210/297;margin:auto;box-shadow:0 14px 40px rgba(15,23,42,.14);padding:29px 34px 22px;display:flex;flex-direction:column;position:relative;color:#111827}
.paper-header{text-align:center;border-bottom:2px solid #0f172a;padding-bottom:12px;position:relative}
.paper-brand{font-size:10px;font-weight:800;letter-spacing:.06em;color:#475569}.paper-brand span{color:#cbd5e1;margin:0 4px}
.paper-header h2{font-size:25px;margin:8px 0 3px;letter-spacing:.04em}.paper-header p{font-size:11px;margin:0;color:#64748b}
.paper-meta{display:flex;justify-content:flex-end;gap:18px;margin-top:10px;font-size:10px;color:#475569}.paper-meta i{display:inline-block;width:85px;border-bottom:1px solid #94a3b8}
.paper-grid{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:repeat(3,1fr);gap:9px 11px;margin-top:13px;flex:1;min-height:0}
.sheet-question{border:1px solid #cfd8e5;border-radius:8px;padding:5px 6px 3px;position:relative;display:flex;flex-direction:column;min-height:0;background:#fff;overflow:hidden}
.sheet-question-head{display:flex;align-items:center;justify-content:space-between;gap:6px;min-height:22px}
.sheet-question-no{font-weight:800;font-size:12px;color:#0f172a}.replace-one{border:0;background:#eef4ff;color:#2563eb;font-size:9px;font-weight:700;border-radius:999px;padding:5px 7px;cursor:pointer}
.sheet-visual{flex:1;display:grid;place-items:center;min-height:0;overflow:hidden;position:relative;padding:1px}
/* Version 5: every puzzle is placed on a square logical canvas.
   The square itself is always fully contained in the cell, so 1:1 images and
   code-rendered puzzles keep their complete composition without cropping. */
.sheet-square{position:absolute;left:50%;top:50%;aspect-ratio:1/1;display:grid;place-items:center;transform:translate(-50%,-50%);overflow:visible;pointer-events:none}
.sheet-canvas{position:absolute;left:50%;top:50%;width:560px;height:560px;display:grid;place-items:center;transform-origin:center center;will-change:transform;pointer-events:none}
.sheet-canvas .puzzle{width:100%;height:100%;position:relative}
.sheet-canvas .question-image{display:block;width:100%;height:100%;max-width:none;max-height:none;object-fit:contain;padding:10px}
/* Keep the 560px composition stable when the viewport changes to paper size. */
.sheet-canvas .q3 .mouth{left:34%;top:24%;font-size:104px}
.sheet-canvas .q3 .trail{width:28px;height:5px}
.sheet-canvas .q4 .txt{font-size:76px}
.sheet-canvas .q5{gap:70px}
.sheet-canvas .q5 .heart{font-size:88px}
.sheet-canvas .q5 .box{font-size:70px;padding:44px 48px;border-width:8px}
.sheet-canvas .q6 .x,.sheet-canvas .q6 .mouthchar{font-size:92px}
.sheet-canvas .q12 .books{font-size:62px;gap:16px}
.sheet-canvas .q12 .tree{font-size:96px}
.sheet-canvas .q13 .princes{font-size:42px;gap:18px 25px}
.sheet-canvas .q15 .seven{font-size:70px;gap:12px 18px}
.sheet-canvas .q18{gap:26px}
.sheet-canvas .q18 span{font-size:82px}
.sheet-canvas .q19 span{font-size:112px}
.sheet-answer-line{height:15px;border-top:1px dashed #d7dee8;margin-top:1px;display:flex;align-items:flex-end;color:#94a3b8;font-size:8.5px}.sheet-answer-line:before{content:"答え："}
.answer-cut{margin-top:11px}.cut-line{display:flex;align-items:center;gap:7px;color:#94a3b8;font-size:9px}.cut-line i{height:1px;flex:1;border-top:1px dashed #94a3b8}.cut-line b{font-weight:600}.cut-line span{font-size:12px;color:#64748b}
.paper-answers{margin-top:7px;border:1px solid #d7dee8;border-radius:7px;padding:7px 10px}.paper-answers h3{font-size:11px;margin:0 0 5px}.paper-answers ol{margin:0;padding-left:18px;display:grid;grid-template-columns:repeat(3,1fr);gap:3px 16px;font-size:9px;line-height:1.5}
.answer-cut.is-hidden{visibility:hidden}
.paper-footer{text-align:center;color:#94a3b8;font-size:8px;margin-top:6px}
.maker-actions{display:flex;align-items:center;justify-content:space-between;gap:20px;background:#fff;border:1px solid #dce5ef;border-radius:18px;padding:17px 18px;margin-top:18px}.action-note{display:grid;gap:3px}.action-note b{font-size:14px}.action-note span{font-size:12px;color:#64748b}.print-btn{min-width:190px;padding:13px 18px;border-radius:13px}.used-note{text-align:right;font-size:11px;color:#94a3b8;margin:7px 2px 0}
.worksheet-footer{background:#fff;border-top:1px solid #e5eaf0;padding:22px 0;color:#64748b}.worksheet-footer .wrap{display:flex;justify-content:space-between;gap:20px}.worksheet-footer a{color:#2563eb;text-decoration:none;font-weight:700}

@media(max-width:720px){
 .worksheet-header-row{min-height:66px}.worksheet-header-row .brand{font-size:18px}.worksheet-header-row .tools-link{font-size:12px;padding:9px 11px}
 .worksheet-main{padding-top:12px}.worksheet-hero{padding:17px 0 20px}.worksheet-hero h1{font-size:30px}.worksheet-hero h1 em{font-size:.5em}.worksheet-hero>p{font-size:14px;line-height:1.75;margin-top:14px}
 .maker-panel{padding:17px;border-radius:18px}.maker-heading,.preview-heading{align-items:stretch;flex-direction:column;gap:14px}.maker-main-btn{width:100%}
 .maker-options{grid-template-columns:1fr;gap:10px;margin-top:17px;padding-top:16px}.history-row{flex-wrap:wrap}.history-row button{width:100%;text-align:left;margin:2px 0 0;padding:5px 0}
 .preview-section{margin-top:26px}.secondary-btn{align-self:flex-start}.paper-shell{padding:10px;border-radius:14px;overflow-x:auto}
 .a4-paper{width:720px;padding:27px 32px 20px;transform-origin:top left}.maker-actions{flex-direction:column;align-items:stretch}.print-btn{width:100%}.used-note{text-align:left}
 .worksheet-footer .wrap{flex-direction:column;gap:7px}
}



/* Version 2: SEO content */
.worksheet-seo{margin-top:56px;display:grid;gap:52px}
.seo-section{scroll-margin-top:150px}
.seo-heading{text-align:center;max-width:780px;margin:0 auto 22px}
.seo-heading .section-chip{display:inline-block;margin-bottom:11px}
.seo-heading h2{margin:0;color:#0f172a;font-size:clamp(26px,3.8vw,36px);line-height:1.35;letter-spacing:-.025em}
.seo-heading>p{margin:12px auto 0;color:#64748b;font-size:15px;line-height:1.8}
.seo-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.seo-card{background:#fff;border:1px solid #dbe4f0;border-radius:22px;padding:24px 22px;box-shadow:0 8px 24px rgba(15,23,42,.045)}
.seo-card-icon{display:grid;place-items:center;width:58px;height:58px;border-radius:18px;background:#eaf2ff;color:#1d4ed8;font-size:20px;font-weight:900;margin-bottom:18px;letter-spacing:-.04em}
.seo-card h3{margin:0 0 9px;color:#0f172a;font-size:19px;line-height:1.45}
.seo-card p{margin:0;color:#64748b;font-size:14px;line-height:1.85}

@media(max-width:720px){
 .worksheet-seo{margin-top:42px;gap:42px}.seo-heading{text-align:left;margin-bottom:16px}.seo-heading h2{font-size:25px}.seo-heading>p{font-size:14px}
 .seo-card-grid{grid-template-columns:1fr;gap:12px}.seo-card{padding:19px 18px;border-radius:18px}.seo-card-icon{width:50px;height:50px;border-radius:15px;margin-bottom:14px}.seo-card h3{font-size:18px}
}

/* Keep one compact sheet inside iPhone AirPrint's stricter printable area. */
@media print {
 @page { size:A4 portrait; margin:5mm; }
 html,body { margin:0!important;padding:0!important;width:auto!important;height:277mm!important;min-height:0!important;overflow:hidden!important;background:white!important; }
 body > :not(.worksheet-main),.worksheet-hero,.maker-panel,.preview-heading,.maker-actions,.used-note,.worksheet-seo,.replace-one { display:none!important; }
 .worksheet-main,.worksheet-wrap,.preview-section,.paper-shell { display:block!important;width:100%!important;height:277mm!important;min-height:0!important;max-width:none!important;margin:0!important;padding:0!important;overflow:hidden!important;transform:none!important;box-shadow:none!important;background:white!important; }
 .a4-paper { box-sizing:border-box!important;position:relative!important;width:190mm!important;height:270mm!important;min-height:0!important;aspect-ratio:auto!important;margin:0 auto!important;padding:5mm 7mm 4mm!important;overflow:hidden!important;transform:none!important;box-shadow:none!important;break-inside:avoid!important;page-break-inside:avoid!important;break-after:avoid!important;page-break-after:avoid!important; }
 .paper-header { flex-shrink:0;padding-bottom:2.4mm; }
 .paper-header h2 { font-size:19px;margin:1.7mm 0 .6mm; }
 .paper-meta { margin-top:1.8mm; }
 .paper-grid { grid-template-rows:repeat(3,minmax(0,1fr));gap:2.2mm 2.7mm;margin-top:2.3mm;min-height:0; }
 .sheet-question { padding:1.7mm 2mm 1.1mm;break-inside:avoid; }
 .sheet-question-head { min-height:5mm;flex-shrink:0; }
 .sheet-answer-line { height:4.2mm;flex-shrink:0;font-size:8.5px; }
 .answer-cut { flex-shrink:0;margin-top:2mm; }
 .paper-answers { margin-top:1.5mm;padding:1.5mm 2.4mm; }
 .paper-footer { flex-shrink:0;margin-top:1mm; }
}