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#4d311033}.book-side-nav-arrow{z-index:25;-webkit-backdrop-filter:blur(8px);color:#f2deb1;cursor:pointer;-webkit-user-select:none;user-select:none;background:linear-gradient(145deg,#1e1a14db,#12100cf0);border:1px solid #eccc8c6b;border-radius:50%;justify-content:center;align-items:center;width:clamp(46px,3.6vw,58px);height:clamp(46px,3.6vw,58px);transition:background .16s,border-color .16s,transform .16s,opacity .22s,box-shadow .16s;display:inline-flex;position:absolute;top:50%;transform:translateY(-50%);box-shadow:0 8px 24px #00000080,inset 0 1px #fff6de4d}.book-side-nav-arrow.book-side-nav-prev{left:clamp(10px,1.8vw,28px)}.book-side-nav-arrow.book-side-nav-next{right:clamp(10px,1.8vw,28px)}.book-side-nav-arrow:hover:not(:disabled){color:#fff6e5;background:linear-gradient(145deg,#eccc8c5c,#b083434d);border-color:#eccc8cbf;transform:translateY(-50%)scale(1.08);box-shadow:0 10px 28px #0009,0 0 18px #eccc8c47,inset 0 1px #fff6de59}.book-side-nav-arrow:active:not(:disabled){transform:translateY(-50%)scale(.96)}.book-side-nav-arrow:disabled{opacity:.22;cursor:default;pointer-events:none}#book-viewport{box-sizing:border-box;width:100%;height:100%;min-height:0;padding:clamp(10px, 1.4vh, 18px) clamp(6px, 1vw, 16px) calc(clamp(64px, 8.5vh, 88px) + env(safe-area-inset-bottom));touch-action:pan-y;justify-content:center;align-items:center;display:flex;position:relative;overflow:hidden}#book-container{background:linear-gradient(90deg,#0000 calc(50% - 3px),#53361047 calc(50% - 3px),#dfba7066 50%,#5336104d calc(50% + 3px),#0000 calc(50% + 3px)),radial-gradient(circle,#fff8e614,#0000 62%),#333;max-width:min(96vw,1680px);max-height:min(88dvh,1220px);margin-inline:auto;position:relative;box-shadow:0 0 120px #000000b3,0 20px 42px #00000073}.page{background-color:#fffaf0;background-repeat:no-repeat;background-size:cover;background-position:var(--page-focal-x) var(--page-focal-y);box-shadow:inset 0 0 0 1px #0000000a}.page-content{background-repeat:no-repeat;background-size:cover;background-position:var(--page-focal-x) var(--page-focal-y);backface-visibility:hidden;will-change:transform;width:100%;height:100%;image-rendering:high-quality;image-rendering:-webkit-optimize-contrast;position:relative;overflow:hidden;transform:translateZ(0);box-shadow:inset 0 0 24px #00000014}.page-glow{pointer-events:none;z-index:2;width:100%;height:100%;position:absolute;top:0}.left-side{border-right:1px solid #0000001a}.left-side .page-glow{background:linear-gradient(90deg,#0000 80%,#00000026 95%,#0003 100%)}.right-side .page-glow{background:linear-gradient(270deg,#0000 80%,#00000026 95%,#0003 100%)}.text-layer{color:#0000;-webkit-user-select:none;user-select:none;pointer-events:none;z-index:3;padding:50px;font-size:1.1rem;line-height:1.6;position:absolute;inset:0}@media (width<=640px){.book-filter-summary{justify-content:center;max-width:none;top:118px;left:10px;right:10px}.book-ui-actions{flex-wrap:wrap;justify-content:center;width:auto;left:10px;right:10px}.book-ui-actions button{flex:150px;min-width:0}#book-viewport{padding-top:64px;padding-bottom:calc(102px + env(safe-area-inset-bottom))}.book-controls{gap:6px}.book-controls span{order:-1;width:min(94vw,320px)}.book-controls button{flex:130px;max-width:170px}.book-side-nav-arrow{width:40px;height:40px}.book-side-nav-arrow.book-side-nav-prev{left:6px}.book-side-nav-arrow.book-side-nav-next{right:6px}}@media (width>=1500px){.main-content{padding:16px 20px 14px}.book-ui-actions{gap:10px;padding:10px}.book-ui-actions button{min-height:44px;font-size:.88rem}.book-controls{padding-bottom:calc(16px + env(safe-area-inset-bottom))}.book-controls button{min-width:104px;min-height:40px;font-size:.9rem}.book-controls span{min-width:176px;font-size:1rem}}@keyframes modal-fade-in{0%{opacity:0}to{opacity:1}}.page-modal-backdrop{z-index:var(--z-modal);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#000000e0;justify-content:center;align-items:center;animation:.18s modal-fade-in;display:flex;position:fixed;inset:0}.page-modal-frame{aspect-ratio:520/640;cursor:grab;touch-action:none;-webkit-user-select:none;user-select:none;border-radius:14px;justify-content:center;align-items:center;width:min(96vw,760px);max-height:min(92vh,92dvh);display:flex;position:relative;overflow:hidden;box-shadow:0 40px 80px #000000b3,0 0 0 1px #ffffff14}.page-modal-frame:active{cursor:grabbing}.page-modal-image{transform-origin:50%;will-change:transform;width:auto;max-width:100%;height:auto;max-height:100%;image-rendering:high-quality;image-rendering:-webkit-optimize-contrast;pointer-events:none;-webkit-user-select:none;user-select:none;flex-shrink:0;display:block}.page-modal-label{color:#f5f5f7;text-align:center;pointer-events:none;letter-spacing:.02em;background:linear-gradient(#0000 0%,#000000b8 100%);padding:28px 16px 14px;font-size:.875rem;position:absolute;bottom:0;left:0;right:0}.page-modal-close,.page-modal-reset{color:#f3dfb2;cursor:pointer;width:42px;height:42px;z-index:var(--z-modal-controls);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:linear-gradient(145deg,#eccc8c42,#b0834338);border:1px solid #eccc8c42;border-radius:50%;place-items:center;transition:background .16s,transform .14s,box-shadow .16s,border-color .16s;display:grid;position:fixed;right:22px;box-shadow:0 6px 16px #00000047,inset 0 0 0 1px #eccc8c29}.page-modal-close{font-size:1rem;top:18px}.page-modal-reset{letter-spacing:.03em;border-radius:20px;justify-content:center;align-items:center;gap:6px;width:auto;padding:0 12px;font-size:.72rem;display:flex;top:70px}.page-modal-close:hover,.page-modal-reset:hover{background:linear-gradient(145deg,#eccc8c57,#b083434d);border-color:#eccc8c6b;transform:scale(1.06);box-shadow:0 8px 20px #00000057,inset 0 0 0 1px #eccc8c3d}.page-modal-close:focus-visible,.page-modal-reset:focus-visible{outline-offset:2px;outline:2px solid #eccc8cb8}@media (width<=980px){.tutorial-panel{max-height:min(76vh,76dvh)}.page-modal-frame{border-radius:12px;width:min(98vw,640px);max-height:min(94vh,94dvh)}.page-modal-close,.page-modal-reset{min-height:48px;right:12px}.page-modal-close{width:48px;height:48px;top:12px}.page-modal-reset{min-width:96px;top:60px}}