*{box-sizing:border-box}html,body{margin:0;height:100%;background:#111418;color:#f4f6f7;font-family:Arial,"Noto Sans JP","Yu Gothic",Meiryo,sans-serif}button,input,a{-webkit-tap-highlight-color:transparent}button,a,input{touch-action:manipulation}button,a{color:inherit}button{font:inherit;cursor:pointer}button{border:0}button:disabled{opacity:.25;cursor:default}a{text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,.stage:focus-visible{outline:3px solid #18c7e7;outline-offset:3px}svg{width:22px;height:22px;flex-shrink:0}#catalog-app{height:100dvh;min-height:380px;display:flex;flex-direction:column}.header{height:80px;flex-shrink:0;background:#fff;color:#17202a;display:flex;align-items:center;justify-content:space-between;padding:0 32px;border-bottom:3px solid transparent;border-image:linear-gradient(90deg,#e31525 0 50%,#00a9d0 50% 100%) 1}.wordmark{font-size:27px;font-weight:900;letter-spacing:-1.5px;line-height:1}.wordmark span{color:#e31d2e}.wordmark b{color:#009ec6}.wordmark small{display:block;font-size:9px;letter-spacing:2.5px;font-weight:600;color:#46515a;margin-top:7px}.header-actions{display:flex;gap:24px;align-items:center}.home-link{display:flex;gap:8px;align-items:center;font-size:12px;font-weight:700}.home-link:hover{color:#009ec6}.header .icon-button{background:#f2f4f5}.viewer{flex:1;min-height:0;display:flex;flex-direction:column;background:radial-gradient(ellipse at 50% 38%,#30363e,#171b20 75%)}.topbar{height:61px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 32px}.catalog-title{display:flex;align-items:center;gap:9px;font-size:10px;letter-spacing:1.7px;font-weight:700;color:#a9b3bc}.status-dot{width:5px;height:5px;background:#04b6d9;border-radius:50%}.edition{font-size:10px;letter-spacing:.6px;margin-left:8px;color:#87939e;font-weight:400}.mode-switch{display:flex;padding:3px;background:#0e1217;border:1px solid #323a43;border-radius:7px}.mode-switch button{font-size:11px;letter-spacing:.3px;padding:8px 15px;border-radius:4px;color:#9da9b5;background:transparent;min-width:70px}.mode-switch button[aria-pressed=true]{background:#3b454f;color:#fff;box-shadow:0 1px 5px #0003}.reading-area{flex:1;min-height:0;position:relative;margin:0 22px}.stage{height:100%;overflow:auto;overscroll-behavior:contain;touch-action:none;scrollbar-color:#626e79 #1c2228;scrollbar-width:thin;border-radius:2px;cursor:grab}.stage.dragging{cursor:grabbing}.canvas{min-width:100%;min-height:100%;display:flex;padding:12px 52px;align-items:center;justify-content:center}.book{display:flex;flex-shrink:0;box-shadow:0 20px 45px #0008;position:relative;background:#090909}.page{flex:none;position:relative;overflow:hidden}.page+ .page{box-shadow:inset 1px 0 #000}.page img{display:block;width:100%;height:100%;max-width:none;object-fit:contain;user-select:none;-webkit-user-drag:none;background:#111}.page+.page:after{content:"";position:absolute;left:0;top:0;bottom:0;width:9px;background:linear-gradient(90deg,#0004,transparent);pointer-events:none}.book.turning{animation:page-in .2s ease-out}@keyframes page-in{from{opacity:.4;transform:translateX(5px)}to{opacity:1;transform:translateX(0)}}.page-error{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:18px;padding:25px;text-align:center;color:#d8e2eb;font-size:13px}.page-error button{padding:9px 18px;background:#08718a;color:#fff;border-radius:5px}.edge-button{position:absolute;top:50%;transform:translateY(-50%);height:56px;width:42px;border:1px solid #ffffff18;background:#252c34c9;border-radius:6px;display:grid;place-items:center;z-index:3;transition:background .15s}.edge-button:hover:not(:disabled){background:#485560}.previous{left:0}.next{right:0}.reading-caption{height:34px;flex-shrink:0;display:flex;align-items:center;justify-content:center;gap:18px;font-size:10px;letter-spacing:.5px;color:#b4bfc8}.reading-caption #gesture-hint{color:#778794;font-size:10px}.toolbar{flex-shrink:0;min-height:69px;background:#10151b;border-top:1px solid #ffffff0d;display:flex;gap:30px;justify-content:center;align-items:center;padding:9px 20px}.tool-group{display:flex;align-items:center;gap:7px}.tool-group+.tool-group{border-left:1px solid #323b45;padding-left:27px}.icon-button{width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;background:transparent;border-radius:6px;color:inherit}.icon-button:hover:not(:disabled){background:#ffffff13}.tool-caption{font-size:11px;color:#b2bdc7}.paging{gap:9px}#jump-form{display:flex;gap:8px;align-items:center;font-size:12px;color:#97a6b2}#page-input{width:39px;height:33px;border:1px solid #46525d;border-radius:4px;background:#202a34;color:#fff;text-align:center;font-size:13px;appearance:textfield;-moz-appearance:textfield}#page-input::-webkit-inner-spin-button{appearance:none}.zoom-value{font-size:12px;font-variant-numeric:tabular-nums;min-width:48px;background:transparent;color:#d7e0e7;height:40px}.progress-track{height:2px;background:#25313b;flex-shrink:0}#progress{height:100%;width:8.333%;background:#08b5dc;transition:width .2s}.footer{height:29px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between;padding:0 32px;font-size:8px;letter-spacing:1.5px;color:#73808b;background:#0c1015}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}dialog{border:1px solid #dfe5e9;border-radius:12px;background:#f5f7f8;color:#18212a;width:min(860px,92vw);max-height:86dvh;padding:25px 28px;box-shadow:0 25px 100px #0007}dialog::backdrop{background:#05090dc9;backdrop-filter:blur(4px)}.dialog-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.dialog-header small{font-size:10px;color:#0089ab;letter-spacing:2px;font-weight:700}.dialog-header h2{font-size:21px;letter-spacing:1px;margin:5px 0 0}.dialog-header .icon-button:hover{background:#e3e8ec}.chapters{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:23px}.chapters button{background:#e5ebef;padding:9px 13px;border-radius:20px;font-size:11px;color:#324552}.chapters button:hover{background:#cceef5}.thumbnail-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.thumbnail{padding:6px;background:#fff;border:2px solid transparent;border-radius:6px;text-align:left;color:#192f3d}.thumbnail:hover{border-color:#a4d5e0}.thumbnail[aria-current=true]{border-color:#009fc5;background:#e7f8fc}.thumbnail img{width:100%;aspect-ratio:210/297;object-fit:contain;display:block;background:#111}.thumbnail span{display:block;font-size:10px;line-height:1.6;padding:8px 3px 2px}.thumbnail b{font-size:11px;color:#0084a6;margin-right:6px}.small-dialog{width:min(500px,92vw)}.help-list{font-size:13px;line-height:1.8}.help-list dt{font-weight:700;margin-top:18px}.help-list dd{margin:4px 0 0;color:#586875}.share-url{width:100%;padding:12px;border:1px solid #b9c5ce;border-radius:5px;background:#fff;font-size:12px}.primary-button{margin-top:16px;background:#006f88;color:#fff;padding:12px 22px;border-radius:5px;font-size:13px}.local-note{font-size:12px;line-height:1.7;color:#576977}.toast{position:fixed;bottom:115px;left:50%;transform:translateX(-50%);background:#fff;color:#172b3c;padding:12px 20px;border-radius:6px;font-size:12px;box-shadow:0 8px 30px #0005;opacity:0;pointer-events:none;z-index:10;transition:opacity .15s}.toast.visible{opacity:1}.expanded{position:fixed!important;inset:0;z-index:2147483000;height:100dvh!important}.expanded .header,.expanded .footer{display:none}#catalog-app:fullscreen .header,#catalog-app:fullscreen .footer{display:none}
@media(max-width:700px){.header{height:66px;padding:0 17px}.wordmark{font-size:24px}.wordmark small{font-size:8px}.header-actions{gap:9px}.home-link{font-size:10px;gap:4px}.home-link svg{width:17px}.topbar{height:56px;padding:0 15px}.edition{display:none}.catalog-title{font-size:9px;letter-spacing:1px}.mode-switch button{padding:8px 10px;min-width:57px;font-size:10px}.reading-area{margin:0 5px}.canvas{padding:8px 26px}.edge-button{width:27px;height:44px;background:#252c34d9}.edge-button svg{width:20px}.reading-caption{height:32px;font-size:9px;gap:6px}.reading-caption #gesture-hint{display:none}.toolbar{padding:8px 8px;gap:6px;min-height:63px}.tool-group{gap:0}.tool-group+.tool-group{padding-left:5px}.icon-button{width:34px;height:40px}.icon-button svg{width:20px}.tool-caption{display:none}.paging{gap:0}#page-input{width:30px;height:31px}#jump-form{gap:4px;font-size:10px}.zoom-value{min-width:39px;font-size:11px}.footer{height:25px;padding:0 15px;font-size:7px;letter-spacing:1px}.thumbnail-grid{grid-template-columns:repeat(3,1fr);gap:8px}dialog{padding:18px}.thumbnail span{font-size:9px}.thumbnail b{display:block}.utilities #share{display:none}}
@media(max-width:370px){.toolbar{gap:2px;padding:6px 3px}.tool-group+.tool-group{padding-left:2px}.icon-button{width:30px}.zoom-value{min-width:35px}.header-actions{gap:0}.catalog-title{letter-spacing:0}.thumbnail-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-height:520px) and (min-width:701px){.header{height:55px}.topbar{height:44px}.toolbar{min-height:53px;padding:4px}.footer{height:20px}.reading-caption{height:25px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
/* Keep tables continuous across facing pages. */
.page+.page{box-shadow:none}.page+.page:after{display:none}
[hidden]{display:none!important}
/* A physical sheet rotates around the spine; front and back stay readable. */
.book.flipping{isolation:isolate}.turn-layer{position:absolute;inset:0;z-index:5;perspective:1800px;pointer-events:none;overflow:visible}.turn-base{position:absolute;inset:0;display:flex;background:#111}.turn-base img{width:100%;height:100%;object-fit:fill;min-width:0;flex:1}.turn-base img+img{width:50%}.turn-base:has(img+img) img{width:50%}.turn-leaf{position:absolute;top:0;height:100%;transform-style:preserve-3d;will-change:transform}.turn-leaf.pair{width:50%}.turn-leaf.single{width:100%}.turn-leaf.forward{right:0;transform-origin:left center}.turn-leaf.backward{left:0;transform-origin:right center}.turn-face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;background:#111;overflow:hidden;box-shadow:0 6px 18px #0005}.turn-face img{display:block;width:100%;height:100%;object-fit:fill}.turn-back{transform:rotateY(180deg)}.turn-face:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#0004,transparent 18%,#ffffff0b 65%,#0002);pointer-events:none}.turn-leaf.backward .turn-face:after{transform:scaleX(-1)}#sound[aria-pressed=false]{color:#71808b}#sound[aria-pressed=false]:after{content:"";position:absolute;width:24px;height:2px;background:currentColor;transform:rotate(-45deg)}#sound{position:relative}.header-actions{gap:12px}@media(max-width:700px){.header-actions{gap:3px}.header-actions .icon-button{width:31px}.home-link{font-size:10px}.wordmark{font-size:22px}}
.stage.is-turning{overflow:hidden}
/* Stable two-slot book geometry, including front/back covers. */
.book{background:transparent;box-shadow:none}.page:not(.blank-page){box-shadow:0 12px 28px #0006}.blank-page{background:transparent;pointer-events:none}.turn-base{background:transparent}.turn-base>*{flex:none!important;width:100%!important;height:100%;object-fit:contain!important}.turn-base.pair>*{width:50%!important}.turn-blank{background:transparent}.turn-face img{object-fit:contain}.book.flipping>.page{visibility:hidden}