:root{--green:#1c432a;--paper:#f7f5ee;--kraft:#c7a06a;font-family:"Yu Gothic","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;color:var(--green);background:var(--paper);font-synthesis:none;color-scheme:light}
/* Reserve horizontal one-finger motion for page turns only while fitted. */
.viewport[data-touch-navigation="swipe"]{touch-action:pan-y pinch-zoom}
.viewport[data-touch-navigation="pan"]{touch-action:pan-x pan-y pinch-zoom}
*{box-sizing:border-box}body{margin:0;min-width:280px}button,input{font:inherit}button{cursor:pointer;touch-action:manipulation;background:transparent;border:1px solid #1c432a35;border-radius:3px;color:var(--green);min-height:40px;padding:7px 12px}button:hover{background:#1c432a0d}button:disabled{opacity:.38;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible,.viewport:focus-visible{outline:3px solid #a47234;outline-offset:3px}[hidden]{display:none!important}
.masthead{height:76px;display:flex;align-items:center;padding:0 28px;border-bottom:1px solid #1c432a21;gap:24px;background:var(--green);color:var(--paper)}.brand{display:flex;align-items:center;flex-shrink:0}.brand img{width:144px;height:auto}.edition{font-size:12px;letter-spacing:.12em}.edition span{margin-left:10px}.review-badge{font-size:10px;letter-spacing:.04em;border:1px solid #ffffff40;padding:5px 8px;margin-left:auto}
#landing{height:calc(100svh - 76px);min-height:600px}#coverFrame{border:0;width:100%;height:100%;display:block}#staticCover{text-align:center;padding:100px 30px}.toolbar{padding:12px 28px;display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid #1c432a21;flex-wrap:wrap;background:var(--paper)}.page-controls,.zoom-controls,#jumpForm{display:flex;align-items:center;gap:8px}.page-controls{gap:12px}#jumpForm{font-size:12px}#pageNumber{border:1px solid #1c432a40;border-radius:3px;background:#fff;width:56px;height:40px;padding:6px;text-align:center;color:var(--green)}#zoomLabel{font-size:12px;min-width:42px;text-align:center;font-variant-numeric:tabular-nums}.mouse-mode{display:flex;align-items:center;gap:6px;font-size:11px;margin-left:6px}.mouse-mode input{accent-color:var(--green);width:16px;height:16px}.zoom-controls button{min-width:40px}
.reading-area{position:relative;background:#e8e6df}.viewport{height:calc(100svh - 76px - 65px - 49px - 32px);min-height:240px;overflow:auto;padding:24px;overscroll-behavior:contain;scrollbar-gutter:stable;touch-action:pan-x pan-y pinch-zoom}.book{display:flex;align-items:flex-start;gap:2px;width:max-content;min-height:100%;margin:auto;position:relative;justify-content:center}.page{margin:auto 0;flex-shrink:0;box-shadow:0 3px 16px #182c1d17;position:relative;background:#fff}.page canvas{display:block;width:100%;height:100%;max-width:none}.viewport.enlarged{cursor:grab}.viewport.dragging{cursor:grabbing;user-select:none}.book.turn-next{animation:next-leaf .12s ease-out}.book.turn-previous{animation:previous-leaf .12s ease-out}.book.reverse.turn-next{animation-name:previous-leaf}.book.reverse.turn-previous{animation-name:next-leaf}@keyframes next-leaf{from{clip-path:inset(0 9% 0 0);opacity:.7;transform:translateX(12px)}to{clip-path:inset(0);opacity:1;transform:translateX(0)}}@keyframes previous-leaf{from{clip-path:inset(0 0 0 9%);opacity:.7;transform:translateX(-12px)}to{clip-path:inset(0);opacity:1;transform:translateX(0)}}
.navigator{position:absolute;left:0;top:20px;bottom:20px;z-index:5;pointer-events:none;display:flex;align-items:flex-start}.toc-tab{pointer-events:auto;flex-shrink:0;width:36px;min-height:84px;padding:12px 6px;writing-mode:vertical-rl;letter-spacing:.22em;background:var(--green);color:var(--paper);border:0;border-radius:0 3px 3px 0;box-shadow:2px 3px 8px #18342020}.toc-tab:hover{background:#285537}.toc-panel{pointer-events:auto;width:min(344px,calc(100vw - 48px));height:100%;background:var(--paper);box-shadow:8px 5px 24px #1c432a24;border:1px solid #1c432a28;display:flex;flex-direction:column;overflow:hidden}.toc-heading{display:flex;justify-content:space-between;align-items:flex-start;padding:20px 18px 13px;border-bottom:1px solid #1c432a22}.toc-heading strong{font-size:18px;font-weight:500}.toc-heading p{font-size:10px;margin:4px 0 0;color:#687368}.toc-heading button{font-size:20px;border:0;min-width:40px;padding:0}#tocList{list-style:none;padding:6px 10px 16px;margin:0;overflow:auto;overscroll-behavior:contain;scrollbar-gutter:stable}#tocList button{width:100%;text-align:left;border:0;display:flex;gap:12px;align-items:baseline;font-size:12px;line-height:1.7;padding:11px 9px;min-height:44px;border-radius:2px}#tocList .page-index{font-family:Arial,sans-serif;font-size:11px;min-width:22px;color:#66776b}#tocList button.visible-page{background:#1c432a0e}#tocList button.selected-page{box-shadow:inset 3px 0 var(--green)}#tocList .printed-label{display:block;font-size:9px;color:#687368}
.reader-footer{display:flex;gap:20px;align-items:center;min-height:49px;padding:4px 28px;font-size:11px;border-top:1px solid #1c432a20}#visibleLabel{font-variant-numeric:tabular-nums}#zoomHint{color:#667267;margin-left:auto}.reader-footer button{border:0;font-size:11px;min-height:36px;padding:4px 0}#diagnostics{padding:7px 28px;font-size:10px;color:#6b746b;border-top:1px solid #1c432a13}#diagnostics summary{cursor:pointer}#renderInfo{white-space:pre-wrap;overflow-wrap:anywhere}.notice:empty{display:none}.notice{position:fixed;bottom:18px;left:50%;transform:translateX(-50%);max-width:calc(100% - 32px);z-index:8;background:var(--green);color:var(--paper);padding:10px 18px;font-size:12px;border-radius:4px;box-shadow:0 3px 20px #1c432a22}.error{margin:32px auto;max-width:560px;padding:24px;background:#fff7e9;border:1px solid #bd9866;color:#5c3d1a}.error h1{font-size:19px}.error p{font-size:13px;line-height:1.8;overflow-wrap:anywhere}
@media(max-width:900px){.masthead{padding:0 18px;height:64px;gap:15px}.brand img{width:116px}.edition{font-size:10px}.review-badge{font-size:9px}.toolbar{padding:10px 16px;justify-content:center}.viewport{height:calc(100svh - 64px - 116px - 62px - 32px);padding:16px}.reader-footer{padding:7px 16px;gap:10px;flex-wrap:wrap;font-size:10px}.reader-footer #zoomHint{order:3;width:100%;margin:0}.reader-footer button{margin-left:auto}.navigator{top:12px;bottom:12px}#landing{height:calc(100svh - 64px);min-height:650px}.mouse-mode{font-size:10px}#diagnostics{padding:7px 16px}}
@media(max-width:480px){.masthead{height:58px;padding:0 14px;gap:10px;flex-wrap:wrap;align-content:center;row-gap:4px}.brand img{width:108px}.edition{font-size:9px;letter-spacing:.02em}.edition span{margin-left:4px}.review-badge{font-size:8px;padding:3px 5px}.toolbar{padding:8px 10px;gap:8px}.page-controls{gap:8px}.page-controls button{font-size:11px;padding:7px 9px}#jumpForm{font-size:10px;gap:5px}#jumpForm label{display:none}#pageNumber{width:46px}.zoom-controls{gap:6px}.zoom-controls button{padding:7px 9px;font-size:11px}.viewport{height:calc(100svh - 58px - 105px - 60px - 32px);padding:16px 12px}.toc-tab{width:32px}.toc-panel{width:calc(100vw - 56px)}#landing{height:calc(100svh - 58px)}.mouse-mode{gap:3px;margin-left:2px}#zoomLabel{font-size:11px;min-width:35px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.error{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);z-index:20;margin:0;width:min(560px,calc(100% - 32px));max-height:85svh;overflow:auto;box-shadow:0 8px 50px #1c432a30}
@media(max-width:360px){.zoom-controls{gap:4px}.zoom-controls button{min-width:34px;padding:7px;white-space:nowrap}.mouse-mode{font-size:9px;white-space:nowrap}}
.page{overflow:hidden}.page .page-preview{position:absolute;inset:0;width:100%;height:100%}.page .page-tile{position:absolute;max-width:none;margin:0;box-shadow:none}.page-pending{position:absolute;inset:0;display:grid;place-items:center;padding:20px;font-size:12px;color:#687368}#buildId{font-size:9px;margin-left:10px;font-family:ui-monospace,monospace}
/* The reader fills the screen. Large spreads use 80vw and scroll vertically;
   Whole view still fits every edge. Page proportions remain unchanged. */
.reader-open{overflow:hidden}.reader-open .masthead{display:none}
.reader-open #reader{display:flex;flex-direction:column;height:100svh;min-height:0}
.reader-open .toolbar{flex:none;padding:6px 16px;gap:6px}
.reader-open .reading-area{flex:1;min-height:0}
.reader-open .viewport{height:100%;min-height:0;padding:8px 12px}
.reader-open .reader-footer{flex:none;min-height:32px;padding:0 16px;gap:12px}
.reader-open .reader-footer button{min-height:30px}
.reader-open #diagnostics{flex:none;padding:4px 16px;max-height:30svh;overflow:auto}
@media(max-width:480px){.reader-open .toolbar{padding:5px 8px}.reader-open .viewport{padding:6px 10px}.reader-open .reader-footer{padding:0 10px;gap:6px}.reader-open #zoomHint{display:none}}

.page .page-tile-preview{position:absolute;max-width:none;margin:0;box-shadow:none}.zoom-controls button[aria-pressed="true"]{background:#1c432a14}
.viewport .page{cursor:grab}.viewport.dragging .page{cursor:grabbing}#pageSound{min-width:28px;padding:3px 6px}#pageSound[aria-pressed="false"]{opacity:.5}

/* Compact controls leave the complete A4 pages almost the full viewport height. */
.reader-open .toolbar{padding:4px 10px;gap:4px}
.reader-open .reader-footer{border:0;padding:0;min-height:0;gap:6px;font-size:10px}
.reader-open #diagnostics{border:0;padding:0;max-height:none;font-size:9px}
.reader-open #diagnostics #renderInfo{position:fixed;z-index:15;top:52px;right:10px;width:min(620px,calc(100vw - 20px));max-height:75svh;overflow:auto;margin:0;padding:12px;background:var(--paper);box-shadow:0 4px 24px #18342030}
.reader-open .viewport{padding:6px 8px}
@media(max-width:900px){.reader-open .toolbar{justify-content:center}.reader-open .reader-footer{margin-left:auto}.reader-open #diagnostics{margin-right:auto}.reader-open .zoom-controls{gap:4px}.reader-open .zoom-controls button{padding:5px 7px}}

@media(max-width:480px){.reader-open .zoom-controls{flex-wrap:wrap;justify-content:center}}

/* Retain the actual cover while the first requested pixels are prepared. */
.reader-opening #landing{display:block;position:fixed;inset:0;height:100svh;min-height:0;z-index:9;background:var(--paper)}
.reader-opening .notice{z-index:10}

/* Transparent PDF hotspots follow the same page box at every scale. */
.pdf-links{position:absolute;inset:0;z-index:4;pointer-events:none}.pdf-link{position:absolute;display:block;pointer-events:auto;min-height:0;min-width:0;padding:0;border:0;border-radius:0;background:transparent;cursor:pointer}.pdf-link:hover{background:#1c432a0b}.pdf-link:focus-visible{outline:2px solid #a47234;outline-offset:1px;background:#1c432a0b}.viewport.dragging .pdf-link{cursor:grabbing;background:transparent}

/* A fold changes only clipping/overlay geometry, never the PDF sampling. */
.page.is-peeling{background:transparent;isolation:isolate}
.page-peel-under{position:absolute;inset:0;background:#f7f5ee;z-index:-1;pointer-events:none}
.page .page-peel-preview{position:absolute;max-width:none;margin:0;box-shadow:none}
.page-peel-fold{position:absolute;inset:0;width:100%;height:100%;z-index:6;overflow:hidden;pointer-events:none}
.turn-guide{position:absolute;left:50%;bottom:70px;transform:translateX(-50%);z-index:7;pointer-events:none;width:max-content;max-width:calc(100% - 56px);padding:14px 20px;background:#1c432a;color:#f7f5ee;border:1px solid #ffffff40;border-radius:4px;box-shadow:0 5px 24px #182c1d25;text-align:center;animation:turn-guide-fade 8s linear forwards}
.turn-guide strong{display:block;font-size:13px;font-weight:500}.turn-guide span{display:block;margin-top:6px;font-size:11px;line-height:1.8}
@keyframes turn-guide-fade{from{opacity:1}to{opacity:0}}
@media(max-width:600px){.turn-guide{bottom:55px;padding:12px 14px;max-width:calc(100% - 36px);width:330px}.turn-guide strong{font-size:12px;line-height:1.8}.turn-guide span{font-size:10px}}
@media(prefers-reduced-motion:reduce){.turn-guide{animation:none}}

/* Physical PDF page1 is the only cover, including after returning to it. */
.cover-mode .toolbar,.cover-mode .navigator{display:none!important}
.cover-actions{flex:none;min-height:68px;display:flex;align-items:center;justify-content:center;gap:22px;background:var(--paper);padding:10px 18px}
.cover-actions a{font-size:12px;color:var(--green);text-underline-offset:4px}
.open-catalog{background:var(--green);color:var(--paper);border:0;min-height:48px;min-width:220px;padding:12px 28px;font-size:15px;letter-spacing:.06em}
.open-catalog:hover{background:#285537}
.pdf-cover-enhancement{position:absolute;inset:0;width:100%;height:100%;opacity:0;pointer-events:none;z-index:6}
.cover-peek-handle{position:absolute;right:0;bottom:0;width:46%;height:34%;min-height:44px;background:transparent!important;border:0;z-index:7;cursor:pointer}
.cover-peek-handle:focus-visible{outline:2px solid var(--kraft);outline-offset:-4px}
.build-label{font-size:9px;line-height:1.2;opacity:.55;white-space:nowrap}
.reader-open .pdf-link{min-height:0}.reader-open button:not(.pdf-link):not(.cover-peek-handle){min-height:44px}
.reader-open .toolbar{font-size:12px}.reader-open .reader-footer button{padding:4px 6px}
.reader-open #reader{height:100dvh}.notice{pointer-events:none}
.cover-mode .notice{bottom:78px}
@media(max-width:600px){.cover-actions{gap:12px;padding:10px 12px}.open-catalog{min-width:190px}.build-label{display:none}.reader-open .toolbar{gap:3px}.reader-open .page-controls{gap:5px}.reader-open .zoom-controls{gap:3px}.reader-open .zoom-controls button{padding:5px 7px}.reader-open .mouse-mode{display:none}}