:root{color-scheme:light;--paper:#f6f4ed;--ink:#243746;--muted:#62707a;--line:#d7d9d4;--accent:#285e64;--toolbar-height:108px;font-family:system-ui,-apple-system,"Segoe UI","Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;color:var(--ink);background:var(--paper);font-size:16px;line-height:1.7}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit;color:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button,a,input,select,summary{touch-action:manipulation}a{color:var(--accent);text-underline-offset:.22em}button{cursor:pointer;min-height:44px;padding:.5rem .9rem;border:1px solid var(--line);border-radius:7px;background:#fffdf8;font-weight:600}button:hover{background:#e9eeea;border-color:#9aafac}button:disabled{cursor:default;opacity:.42}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid #bc7928;outline-offset:3px}button:active{background:#dce6e2}[hidden]{display:none!important}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;z-index:20;top:8px;left:8px;padding:10px 18px;background:white;transform:translateY(-150%)}.skip-link:focus{transform:none}
.introduction{max-width:900px;margin:0 auto;padding:48px 28px 35px}.eyebrow{font-size:.75rem;letter-spacing:.14em;font-weight:650;margin:0 0 9px;color:var(--muted)}h1{font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:clamp(2rem,5.5vw,3.1rem);font-weight:800;line-height:1.35;letter-spacing:.015em;margin:0 0 11px}.byline{font-size:.84rem;color:var(--muted);margin:0}.byline span{padding:0 .45rem}.instructions{font-size:.91rem;margin:23px 0 20px}.mobile-break{display:none}.book-actions{display:flex;gap:16px;align-items:center;flex-wrap:wrap}.book-actions button{border-color:var(--ink);background:var(--ink);color:white;padding:.6rem 1.1rem}.book-actions button:hover{background:#3a5365}.book-actions button span{margin-left:24px}.download-link{display:inline-flex;align-items:center;gap:.35em;min-height:44px;font-size:.85rem}.download-note{font-size:.75rem;color:var(--muted);margin:12px 0 0}
.notice{max-width:820px;margin:20px auto;padding:20px 24px;background:#fff;border:1px solid var(--line);border-radius:8px}.notice a{display:inline-block;min-height:44px;padding:9px 0}.reader-toolbar{position:sticky;top:0;z-index:5;background:rgba(246,244,237,.98);border-top:1px solid var(--line);border-bottom:1px solid var(--line);box-shadow:0 3px 14px #24374608}.toolbar-inner{max-width:900px;margin:auto;padding:10px 28px 0}.reading-status{display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:.74rem;line-height:1.5;margin:0 0 7px}.reading-status #current-position{font-variant-numeric:tabular-nums;font-weight:700;white-space:nowrap}#current-chapter{color:var(--muted);overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.toolbar-controls{display:flex;align-items:center;gap:10px}.toolbar-controls>button{font-size:.8rem;white-space:nowrap}.toolbar-controls>button:last-child{margin-left:auto}.page-form{display:flex;align-items:center;border:1px solid var(--line);background:white;border-radius:7px;padding-left:8px;height:44px;gap:5px}.page-form input{width:3.1rem;min-height:42px;border:0;background:transparent;text-align:center;padding:0;font-variant-numeric:tabular-nums;-moz-appearance:textfield}.page-form input::-webkit-inner-spin-button{appearance:none}.page-form button{min-height:42px;border:0;border-left:1px solid var(--line);border-radius:0 6px 6px 0;font-size:.77rem;font-weight:600;padding:0 12px}.page-total{font-size:.72rem;color:var(--muted);white-space:nowrap}.progress-track{height:3px;background:#e0e4dc;margin-top:10px}#reading-progress{height:100%;background:var(--accent);width:0;transition:width .2s}
.reader{max-width:880px;margin:0 auto;padding:20px 20px 0;overflow-anchor:none}.page{margin:0 0 28px;scroll-margin-top:calc(var(--toolbar-height) + 16px)}.page-caption{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:0 2px 10px;min-height:54px}.page-label{font-size:.79rem;font-variant-numeric:tabular-nums;letter-spacing:.04em;font-weight:650}.page-label small{font-size:.75rem;color:var(--muted);font-weight:400;margin-left:.65em}.enlarge-button{font-size:.76rem;min-width:74px;padding:.4rem .8rem;background:transparent}.page-art{position:relative;width:100%;background:#fff;aspect-ratio:var(--page-ratio);box-shadow:0 2px 10px #2437460d}.page-image{display:block;width:100%;height:100%;cursor:zoom-in;object-fit:contain}.source-links{position:absolute;inset:0;pointer-events:none}.source-hotspot{position:absolute;pointer-events:auto;display:block;border-radius:1px}.source-hotspot:hover{background:#97b4b530;outline:1px solid var(--accent)}.page-load-error{font-size:.8rem;margin:0;padding:12px 4px;color:#8a3c2d}.page-load-error button{margin-left:8px;font-size:.8rem}.references{margin-top:10px;border:1px solid var(--line);border-radius:7px;background:#fffdf8;font-size:.79rem}.references summary{cursor:pointer;min-height:44px;padding:10px 13px;color:var(--muted)}.references ol{list-style:none;padding:0 12px 10px;margin:0}.references a{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:48px;padding:9px 4px;border-top:1px solid #e9ebe6;overflow-wrap:anywhere;line-height:1.5}.references a span:last-child{flex:none;text-decoration:none}.site-footer{text-align:center;padding:42px 20px 64px;border-top:1px solid var(--line);font-size:.8rem;color:var(--muted)}.site-footer p{margin:6px 0}.site-footer>a{display:inline-block;padding:12px;min-height:44px;margin-top:15px}.site-footer .end-mark{font-family:"Yu Mincho",serif;letter-spacing:.28em;font-size:1.3rem;color:var(--ink);margin-bottom:24px}
dialog{color:var(--ink);border:1px solid var(--line);border-radius:12px;padding:0;background:var(--paper);box-shadow:0 20px 80px #15232f40}dialog::backdrop{background:#15232f99}.contents-dialog{width:min(650px,calc(100% - 24px));max-height:85dvh;overscroll-behavior:contain}.dialog-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 24px 18px;position:sticky;top:0;background:var(--paper);z-index:1;border-bottom:1px solid var(--line)}h2{font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:1.5rem;line-height:1.3;margin:0}.dialog-heading .eyebrow{margin-bottom:4px}.dialog-heading button{font-size:.8rem}.chapter-select{padding:18px 24px 8px}.chapter-select label{display:block;font-size:.8rem;margin-bottom:6px}.chapter-select select{width:100%;min-height:46px;background:white;border:1px solid var(--line);border-radius:6px;padding:8px;font-size:.85rem}.contents-dialog ol{list-style:none;margin:8px 0 0;padding:0 24px 24px}.contents-dialog li{border-bottom:1px solid var(--line)}.contents-dialog li a{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:52px;text-decoration:none;font-size:.85rem;line-height:1.5;padding:10px 0}.contents-dialog li a:hover{text-decoration:underline}.contents-dialog li a small{font-size:.75rem;white-space:nowrap;font-variant-numeric:tabular-nums;color:var(--muted)}
.zoom-dialog{width:calc(100% - 24px);height:calc(100dvh - 24px);max-width:1440px;max-height:none;overflow:hidden}.zoom-dialog[open]{display:flex;flex-direction:column}.zoom-toolbar{display:grid;grid-template-columns:1fr auto;gap:10px;padding:14px 18px 10px;flex:none;border-bottom:1px solid var(--line)}.zoom-toolbar h2{font-family:inherit;font-size:.9rem;align-self:center}.zoom-toolbar>button{font-size:.8rem}.zoom-controls{display:flex;gap:8px;align-items:center;grid-column:1/-1}.zoom-controls button{font-size:.85rem;min-width:44px}#zoom-level{min-width:54px;text-align:center;font-size:.8rem;font-variant-numeric:tabular-nums}.zoom-controls #zoom-fit{margin-left:4px;font-size:.78rem}.zoom-hint{font-size:.7rem;color:var(--muted);margin:0;grid-column:1/-1}.zoom-viewport{flex:1;min-height:0;overflow:auto;background:#dde0da;overscroll-behavior:contain;cursor:grab;touch-action:pan-x pan-y pinch-zoom;scrollbar-gutter:stable}.zoom-viewport.dragging{cursor:grabbing;user-select:none}.zoom-canvas{position:relative;background:white;flex:none;margin:0 auto;overflow:hidden}.zoom-canvas img{width:100%;height:100%;display:block;pointer-events:none;user-select:none}.zoom-message{position:absolute;bottom:10px;left:12px;right:12px;background:#fff7e9;border:1px solid #c99558;padding:10px;margin:0;font-size:.8rem}.zoom-message button{margin-left:8px}.zoom-canvas .source-hotspot{cursor:pointer}
@media(min-width:1100px){.introduction{padding-top:58px;padding-bottom:42px}.reader{padding-top:24px}.page{margin-bottom:40px}}
@media(max-width:600px){.introduction{padding:32px 20px 25px}h1{font-size:2.04rem;letter-spacing:0}.instructions{font-size:.8rem;margin:20px 0 17px}.mobile-break{display:initial}.book-actions{gap:6px 14px}.book-actions button{font-size:.8rem}.download-link{font-size:.75rem}.download-note{font-size:.68rem;margin-top:8px}.toolbar-inner{padding:8px 12px 0}.reading-status{font-size:.66rem;gap:14px}.toolbar-controls{gap:6px}.toolbar-controls>button{font-size:.72rem;padding:6px 9px}.toolbar-controls>button:last-child{margin-left:auto}.page-form{padding-left:3px;gap:3px;flex:none}.page-form input{width:2.5rem;font-size:.85rem}.page-form button{padding:0 8px;font-size:.7rem}.page-total{font-size:.65rem}.reader{padding:12px 8px 0}.page-caption{padding-left:6px;padding-right:6px}.page-label{font-size:.74rem}.page-label small{font-size:.69rem}.page{margin-bottom:20px}.references{margin-left:4px;margin-right:4px}.references summary{font-size:.73rem}.zoom-dialog{width:100%;height:100dvh;max-height:100dvh;border-radius:0;border:0}.zoom-toolbar{padding:10px 12px 8px;gap:7px}.zoom-hint{font-size:.65rem}.zoom-controls{gap:5px}.zoom-controls #zoom-fit{padding-left:9px;padding-right:9px}.contents-dialog ol{padding-left:18px;padding-right:18px}.dialog-heading{padding:18px}.chapter-select{padding-left:18px;padding-right:18px}.notice{margin:16px 12px;padding:16px;font-size:.85rem}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

html{scrollbar-gutter:stable}.zoom-references{flex:none;max-height:30dvh;overflow:auto;margin:0;border-width:0 0 1px;border-radius:0}.zoom-references summary{font-size:.75rem;padding:8px 18px}.zoom-references ol{padding:0 18px 8px}

.page-form{height:46px}.page-form input{min-height:44px;min-width:44px}.page-form button{min-height:44px}.site-footer p a{display:inline-block;min-height:44px;padding:9px 0}
button{min-width:44px}

/* The reading shell keeps the existing introduction outside the viewport stage. */
.reader-shell{position:relative;background:var(--paper);isolation:isolate}
.reader-shell:fullscreen{width:100%;height:100dvh;overflow:auto}
.reader-shell .toolbar-inner{max-width:none;padding:8px 20px 0}
.presentation-controls{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:6px;font-size:.76rem}
.presentation-controls label,.size-controls{display:flex;align-items:center;gap:6px}
.presentation-controls select{min-height:44px;background:#fffdf8;border:1px solid var(--line);border-radius:7px;padding:5px 8px;max-width:180px}
.presentation-controls button{font-size:.76rem;padding:6px 10px}
.size-controls{flex-wrap:wrap}.size-controls button{padding:6px;min-width:44px}
#size-slider{width:100px;min-height:44px;margin:0}#size-level{min-width:42px;text-align:center;font-variant-numeric:tabular-nums}
#reader-message{margin:0;font-size:.75rem}#reader-message:not(:empty){padding:5px 0}
.reading-body{position:relative}.reading-stage{min-width:0;outline-offset:-3px;overflow-anchor:none}
.reader-shell[data-mode="vertical"] .reading-stage{overflow:visible}
.reference-panel{background:var(--paper);box-shadow:0 4px 32px #15232f30;border:1px solid var(--line);z-index:8;display:flex;flex-direction:column;max-height:calc(100dvh - 20px);width:min(380px,calc(100vw - 24px));position:fixed;right:12px;top:10px;overscroll-behavior:contain}
.reference-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 14px;border-bottom:1px solid var(--line);flex:none}
.reference-heading h2{font-family:inherit;font-size:.95rem}.reference-heading button{font-size:.75rem;padding:6px 10px}
.reference-content{overflow:auto;overscroll-behavior:contain;padding:0 16px 20px;font-size:.8rem}
.reference-content h3{font-size:.82rem;margin:20px 0 8px}.reference-content ol{list-style:none;margin:0;padding:0}
.reference-content li{border-top:1px solid var(--line)}.reference-content a{min-height:48px;padding:10px 0;display:flex;justify-content:space-between;gap:10px;align-items:center;overflow-wrap:anywhere}
.reference-content p{color:var(--muted);font-size:.75rem}.zoom-show-references{font-size:.75rem;align-self:flex-start;margin:6px 12px;flex:none}
.zoom-dialog .reference-panel{position:absolute;right:8px;top:8px;bottom:8px;max-height:none}
.reader-shell[data-mode="spread"],.reader-shell[data-mode="single"]{height:100dvh;min-height:420px;display:flex;flex-direction:column}
.reader-shell[data-mode="spread"]>.reader-toolbar,.reader-shell[data-mode="single"]>.reader-toolbar{position:relative;top:auto;flex:none}
.reader-shell[data-mode="spread"]>.reading-body,.reader-shell[data-mode="single"]>.reading-body{display:flex;flex:1;min-height:0}
.reader-shell[data-mode="spread"] .reading-stage,.reader-shell[data-mode="single"] .reading-stage{overflow:auto;flex:1;min-height:0;overscroll-behavior:contain;touch-action:pan-x pan-y pinch-zoom;background:#dfe3df}
.reader-shell[data-mode="spread"] .reader,.reader-shell[data-mode="single"] .reader{display:flex;flex-direction:row-reverse;align-items:flex-start;justify-content:safe center;gap:12px;max-width:none;width:max-content;min-width:100%;min-height:100%;padding:6px 12px 12px;margin:0}
.reader-shell[data-mode="spread"] .page,.reader-shell[data-mode="single"] .page{flex-grow:0;flex-shrink:0;margin:0}
.reader-shell[data-mode="spread"] .page-caption,.reader-shell[data-mode="single"] .page-caption{padding:0 2px 4px;min-height:48px}
.reader-shell[data-mode="spread"] .active-page .page-label,.reader-shell[data-mode="single"] .active-page .page-label{color:#1f555b;text-decoration:underline;text-underline-offset:4px}
.reading-stage.can-pan{cursor:grab}.reading-stage.dragging{cursor:grabbing;user-select:none}
.reader-shell:fullscreen[data-mode="vertical"] .reading-stage{height:calc(100dvh - var(--toolbar-height));overflow:auto}
@media(max-width:1023px){.reader-shell .toolbar-inner{padding:6px 12px 0}.presentation-controls{gap:5px;margin-top:4px}.presentation-controls>label{display:none}.presentation-controls #toggle-fullscreen{margin-left:auto}.reading-status{margin-bottom:3px}.progress-track{margin-top:5px}.reference-panel{left:0;right:0;top:auto;bottom:0;width:100%;max-height:72dvh;border-radius:14px 14px 0 0}.zoom-dialog .reference-panel{top:auto;bottom:0;left:0;right:0;max-height:72dvh}.reference-content{padding-bottom:max(20px,env(safe-area-inset-bottom))}}
@media(max-width:450px){.reader-shell .toolbar-controls{gap:4px}.reader-shell .toolbar-controls>button{padding:6px}.reader-shell .toolbar-controls>button:last-child{margin-left:auto}.reader-shell .page-form{gap:2px;padding-left:0}.reader-shell .page-form button{padding:0 5px}.page-total{display:none}}
@media(min-width:1200px){.reader-shell .toolbar-inner{display:grid;grid-template-columns:max-content 1fr;column-gap:16px}.reader-shell .reading-status,.reader-shell .progress-track,#reader-message{grid-column:1/-1}.reader-shell .toolbar-controls{grid-column:1}.reader-shell .presentation-controls{grid-column:2;margin-top:0;justify-content:flex-end}}

/* Dark reader chrome only. The introduction and original artwork keep their colors. */
.reader-shell{color-scheme:dark;--paper:#171b21;--ink:#edf1f5;--muted:#b4beca;--line:#424c59;--accent:#9ddbd3;color:var(--ink);background:var(--paper)}
.reader-shell .reader-toolbar{background:#171b21f5;box-shadow:0 3px 14px #0004}
.reader-shell button,.reader-shell select,.reader-shell .page-form{background:#252d37;color:var(--ink);border-color:var(--line)}
.reader-shell button:hover{background:#364352;border-color:#9fbbcc}.reader-shell button:active{background:#425365}
.reader-shell :focus-visible{outline-color:#ffd88a}
.reader-shell .progress-track{background:#3c4652}
.reader-shell .reading-stage,.reader-shell[data-mode="spread"] .reading-stage,.reader-shell[data-mode="single"] .reading-stage,.reader-shell .zoom-viewport{background:#0d1014}
.reader-shell[data-mode="spread"] .active-page .page-label,.reader-shell[data-mode="single"] .active-page .page-label{color:var(--accent)}
.reader-shell .page-load-error{color:#ffb4a6}.reader-shell .zoom-message{background:#3d3020;color:#ffe6bf}
#toolbar-navigation-home:empty{display:none}
.navigation-rail{position:absolute;z-index:6;left:4px;top:12px;bottom:12px;width:var(--rail-width);overflow:auto;overscroll-behavior:contain;padding:10px;background:var(--paper);border:1px solid var(--line);border-radius:8px}
.navigation-rail .reading-status{display:flex;flex-direction:column;align-items:flex-start;gap:8px;white-space:normal;margin-bottom:14px;font-size:.75rem}
.navigation-rail #current-chapter{white-space:normal;overflow-wrap:anywhere}
.navigation-rail .toolbar-controls{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.navigation-rail #page-form{grid-column:1/-1;grid-row:2;max-width:100%;justify-content:center}
.navigation-rail #toolbar-contents{grid-column:1/-1;width:100%}.navigation-rail .page-total{display:none}
.navigation-rail .toolbar-controls>button:last-child{margin:0}
.reader-shell.references-open>.reading-body>.reference-panel{position:absolute;right:4px;left:auto;top:12px;bottom:12px;max-height:none;width:var(--rail-width);box-shadow:none;border:1px solid var(--line);border-radius:8px}
.reader-shell.references-open>.reading-body>.reference-panel .reference-heading{flex-wrap:wrap;gap:6px;padding:10px}
.reader-shell.references-open>.reading-body>.reference-panel .reference-content{padding:0 10px 16px}
.fullscreen-affordance{position:absolute;z-index:10;right:8px;bottom:8px;display:flex;gap:6px;padding:4px;border-radius:9px;background:#171b21e8}
.fullscreen-affordance button{font-size:.75rem;padding:6px 10px}
.reader-shell:fullscreen{min-height:0;height:100dvh;overflow:hidden;display:flex;flex-direction:column}
.reader-shell:fullscreen>.reader-toolbar{position:absolute;z-index:9;top:8px;left:50%;transform:translateX(-50%);width:min(1100px,calc(100% - 16px));max-height:65dvh;overflow:auto;border:1px solid var(--line);border-radius:9px}
.reader-shell:fullscreen>.reading-body{flex:1;min-height:0;height:100%;display:flex}
.reader-shell:fullscreen .reading-stage{height:100%;overflow:auto;flex:1;min-height:0}
.reader-shell:fullscreen[data-mode="vertical"] .reading-stage{height:100%;overscroll-behavior:contain;touch-action:pan-x pan-y pinch-zoom}
.reader-shell:fullscreen[data-mode="spread"] .reader,.reader-shell:fullscreen[data-mode="single"] .reader{gap:4px;padding:2px;align-items:safe center}
.reader-shell:fullscreen[data-mode="spread"] .page-caption,.reader-shell:fullscreen[data-mode="single"] .page-caption{display:none}
.reader-shell:fullscreen.chrome-hidden>.reader-toolbar{visibility:hidden;pointer-events:none}
.reader-shell:fullscreen>#fullscreen-affordance{flex-direction:column;align-items:stretch}
.reader-shell:fullscreen>#reveal-controls{position:absolute;z-index:10;top:0;left:0;width:100%;height:12px;min-height:0;padding:0;border:0;border-radius:0;background:transparent;color:transparent;font-size:0;box-shadow:none}
.reader-shell:fullscreen:not(.chrome-hidden)>#reveal-controls{height:4px}
.reader-shell:fullscreen>#reveal-controls:focus-visible{height:44px;width:44px;outline:2px solid var(--accent);background:var(--paper)}
.enlargement-help{margin:0;font-size:.72rem;line-height:1.5;color:var(--muted)}
.mobile-menu-actions #image-quality-control{display:flex;align-items:center;gap:8px;min-height:44px}
@media(pointer:coarse){.reader-shell:fullscreen.chrome-hidden>#reveal-controls{height:44px}}
.reader-shell:fullscreen .navigation-rail,.reader-shell:fullscreen.references-open>.reading-body>.reference-panel{bottom:72px}
@media(min-width:1200px){.reader-shell #toolbar-navigation-home{grid-column:1;align-self:center}.reader-shell .presentation-controls{align-self:center}}
@media(max-width:1023px){.reader-shell:fullscreen>.reader-toolbar{top:4px;width:calc(100% - 8px)}.fullscreen-affordance{bottom:max(4px,env(safe-area-inset-bottom));right:4px}}

.reader-shell .reader-front-link{display:inline-flex;align-items:center;min-height:32px;padding:4px 0;white-space:nowrap;flex:none;font-size:.72rem}

/* Let enlarged UI text wrap; a rail is offered only when its text also fits. */
.reader-shell .toolbar-controls{flex-wrap:wrap;min-width:0}
.reader-shell .reading-status{flex-wrap:wrap;min-width:0}
.reader-shell .reading-status #current-position{white-space:normal;overflow-wrap:anywhere}
.reader-shell .toolbar-controls>button{white-space:normal;overflow-wrap:anywhere}
.reader-shell .page-form{height:auto;min-height:46px;max-width:100%;flex-wrap:wrap}
.reader-shell .page-form button{white-space:nowrap;flex:none}
.navigation-rail .toolbar-controls{grid-template-columns:repeat(2,minmax(0,1fr))}
.navigation-rail .toolbar-controls>button{padding-left:4px;padding-right:4px}
.navigation-rail #page-form input{max-width:100%}
@media(min-width:1200px){.reader-shell .toolbar-inner{grid-template-columns:minmax(0,max-content) minmax(0,1fr)}}

/* Vertical reading joins the untouched images directly. Controls remain in
   the accessibility tree and reveal on keyboard focus or a precise pointer. */
.reader-shell[data-mode="vertical"] .reader{padding-top:0;padding-bottom:0}
.reader-shell[data-mode="vertical"] .page{position:relative;margin:0}
.reader-shell[data-mode="vertical"] .page-caption{position:absolute;z-index:2;left:4px;right:4px;top:4px;min-height:0;padding:0;opacity:0;pointer-events:none}
.reader-shell[data-mode="vertical"] .page-caption:focus-within{opacity:1;pointer-events:auto}
.reader-shell[data-mode="vertical"] .page-label,.reader-shell[data-mode="vertical"] .enlarge-button{background:#171b21ec;border-radius:6px;color:var(--ink)}
.reader-shell[data-mode="vertical"] .page-label{padding:2px 6px}
@media(hover:hover) and (pointer:fine){.reader-shell[data-mode="vertical"] .page:hover .page-caption{opacity:1;pointer-events:auto}}

/* Mobile keeps the single set of controls at the thumb edge. Artwork is
   contained within the remaining dynamic viewport, with no internal crop. */
.mobile-navigation{position:fixed;z-index:9;left:0;right:0;bottom:0;display:flex;align-items:center;justify-content:center;gap:4px;padding:5px 8px max(5px,env(safe-area-inset-bottom));max-height:40dvh;overflow:visible;background:#171b21f5;border-top:1px solid var(--line);box-shadow:0 -2px 12px #0003}
.mobile-navigation .toolbar-controls{order:0;flex:1;justify-content:center;gap:4px;max-width:max-content}
.mobile-navigation .toolbar-controls>button{margin:0;min-width:44px;padding:4px 8px}
.mobile-navigation .page-form{flex:none;padding-left:0;gap:0}
.mobile-navigation .page-form input{width:2.5rem}
.mobile-navigation .page-form button{padding:0 6px}
.mobile-menu{order:1;flex:none}
.mobile-menu>summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:4px 8px;font-size:.72rem;border:1px solid var(--line);border-radius:7px;background:#252d37}
.mobile-menu>summary::-webkit-details-marker{display:none}
.mobile-menu-actions{position:absolute;bottom:calc(100% + 6px);right:8px;width:min(380px,calc(100vw - 16px));max-height:60dvh;overflow:auto;padding:12px;background:var(--paper);border:1px solid var(--line);border-radius:9px;box-shadow:0 -4px 24px #0005}
.mobile-menu-actions{display:flex;flex-wrap:wrap;align-items:center}
.mobile-menu-actions .reading-status{width:100%;margin:0 0 10px}
.mobile-menu-actions>button{width:100%;margin:3px 0;white-space:normal}
.mobile-menu-actions #mobile-menu-close{width:auto;min-width:64px;margin:3px 0 3px auto}
@media(max-width:1023px){
  .reader-shell .reference-panel{z-index:12}
  .reader-shell[data-mode="vertical"] .page-caption{display:none}
  .reader-shell[data-mode="vertical"] .page-image{cursor:auto;touch-action:pan-x pan-y pinch-zoom}
  .reader-shell[data-mode="vertical"] .page-art{width:min(100%,calc(max(1px,100dvh - var(--mobile-nav-height,54px)) * var(--page-ratio)));margin-inline:auto}
  .reader-shell[data-mode="vertical"] .reader{padding-bottom:var(--mobile-nav-height,54px)}
  .reader-shell[data-mode="vertical"]~.site-footer{padding-bottom:calc(64px + var(--mobile-nav-height,54px))}
  .reader-shell:fullscreen[data-mode="vertical"] .reading-stage{height:calc(100% - var(--mobile-nav-height,54px))}
  .reader-shell:fullscreen .fullscreen-affordance{bottom:calc(var(--mobile-nav-height,54px) + 6px)}
}

/* Keep the work link first; the cover alone gets its quiet book-opening rail. */
.reader-shell .reader-front-link{font-family:"Yu Mincho","YuMincho","Hiragino Mincho ProN","Noto Serif JP","Noto Serif CJK JP",serif;font-weight:700;white-space:normal;line-height:1.5}
.reader-author{display:none}
.navigation-rail .reader-front-link{font-size:.95rem;width:100%}
.reader-shell[data-page="1"] .navigation-rail .reading-status{gap:7px}
.reader-shell[data-page="1"] .navigation-rail .reader-front-link{font-size:1.15rem;order:-2}
.reader-shell[data-page="1"] .navigation-rail .reader-author{display:block;order:-1;font-size:.7rem;color:var(--muted)}
.reader-shell[data-page="1"] .navigation-rail #current-chapter{font-size:1.02rem;font-weight:600;margin-top:10px}
.reader-shell[data-page="1"] .navigation-rail #current-position{order:1;width:100%;border-top:1px solid #e7b46a;padding-top:10px;margin-top:4px;font-size:.78rem}
/* P1 has 29 fully blank columns per side at normal resolution. Mask 28
   columns conservatively, also inside the HQ image's verified blank area.
   Mobile and other pages retain their complete image boxes, and enlargement
   still opens the original. */
@media(min-width:1024px){
  .reader-shell #page-1 .page-art{aspect-ratio:1144 / 1698;overflow:hidden}
  .reader-shell #page-1 .page-image{width:104.895105%;max-width:none;margin-left:-2.447552%}
}

.reader-shell .zoom-close{position:absolute;z-index:12;right:8px;top:8px;width:44px;height:44px;padding:0;border-radius:50%;background:#171b21bb;border-color:#ffffff66;color:#fff;font-size:1.4rem;line-height:1}
.reader-shell .zoom-canvas.cover-view{background:#0d1014}
.reader-shell .zoom-canvas.cover-view img{clip-path:inset(0 2.5%)}

/* While an image is being fetched, match the surrounding reader surface. */
.page-art.page-loading{background:var(--paper)}
.reference-reading-description { display:block; grid-column:1 / -1; font-size:.9em; line-height:1.5; }