*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:#0c1027;color:#fff;font-family:Cairo,Inter,sans-serif}.lang-en{font-family:Inter,Cairo,sans-serif}.flipbook-page{min-height:100vh;background:radial-gradient(circle at 50% 0,#262d62 0,transparent 38%),linear-gradient(145deg,#090c20,#111632 65%,#17123a)}.flipbook-header{height:70px;padding:0 18px;display:grid;grid-template-columns:1fr minmax(0,2fr) 1fr;align-items:center;gap:12px;border-bottom:1px solid rgba(255,255,255,.10);background:rgba(10,13,32,.82);backdrop-filter:blur(16px);position:relative;z-index:30}.viewer-button{height:42px;min-width:42px;padding:0 12px;display:inline-flex;align-items:center;justify-content:center;gap:7px;border:1px solid rgba(255,255,255,.14);border-radius:13px;background:rgba(255,255,255,.07);color:#fff;text-decoration:none;font:inherit;font-size:11px;cursor:pointer}.viewer-back{justify-self:start}.viewer-actions{justify-self:end;display:flex;gap:7px}.viewer-title{min-width:0;display:flex;align-items:center;justify-content:center;gap:9px;text-align:start}.viewer-title img{width:38px;height:38px;border-radius:10px}.viewer-title div{min-width:0}.viewer-title strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:13px}.viewer-title small{display:block;color:#aeb4d0;font-size:8px;margin-top:2px}.flipbook-stage{min-height:calc(100vh - 70px);position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px 24px 90px;overflow:hidden}.book-scene{width:min(1180px,94vw);height:min(78vh,820px);display:grid;place-items:center;perspective:2200px;touch-action:pan-y}.book-spread{position:relative;width:min(1120px,92vw);aspect-ratio:2.828/1;max-height:calc(100vh - 180px);display:flex;justify-content:center;align-items:stretch;transform-style:preserve-3d;filter:drop-shadow(0 34px 40px rgba(0,0,0,.40))}.book-page{position:relative;flex:1;min-width:0;background:#fff;overflow:hidden;display:flex;align-items:center;justify-content:center}.book-page img{width:100%;height:100%;object-fit:contain;background:#fff;display:block}.page-left{border-radius:8px 0 0 8px;transform-origin:right center}.page-right{border-radius:0 8px 8px 0;transform-origin:left center}.book-gutter{width:2px;position:absolute;top:0;bottom:0;left:50%;z-index:4;background:linear-gradient(90deg,rgba(0,0,0,.24),rgba(255,255,255,.22),rgba(0,0,0,.18));box-shadow:0 0 18px rgba(0,0,0,.32)}.book-shadow{position:absolute;width:min(1050px,84vw);height:70px;border-radius:50%;background:rgba(0,0,0,.48);filter:blur(30px);transform:translateY(min(39vh,390px));opacity:.65}.page-flip{position:absolute;top:0;bottom:0;width:50%;right:0;z-index:10;transform-origin:left center;transform:rotateY(90deg);opacity:0;backface-visibility:hidden;background:#fff;pointer-events:none}.page-flip img{width:100%;height:100%;object-fit:contain}.book-spread.flip-next .page-flip{animation:flipNext .55s cubic-bezier(.55,.05,.25,1)}.book-spread.flip-prev .page-flip{right:auto;left:0;transform-origin:right center;animation:flipPrev .55s cubic-bezier(.55,.05,.25,1)}@keyframes flipNext{0%{transform:rotateY(0);opacity:1}100%{transform:rotateY(-180deg);opacity:.2}}@keyframes flipPrev{0%{transform:rotateY(0);opacity:1}100%{transform:rotateY(180deg);opacity:.2}}.viewer-controls{position:fixed;left:50%;bottom:16px;transform:translateX(-50%);z-index:25;display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:17px;border:1px solid rgba(255,255,255,.13);background:rgba(19,23,51,.88);backdrop-filter:blur(16px);box-shadow:0 17px 45px rgba(0,0,0,.3)}.viewer-controls button{width:42px;height:42px;border:0;border-radius:12px;background:linear-gradient(135deg,#4b52c9,#9628b5);color:#fff;cursor:pointer;font-size:15px}.viewer-controls button:disabled{opacity:.35}.page-counter{min-width:72px;text-align:center;font-size:12px;font-weight:700}.page-counter i{font-style:normal;color:#747b9b;margin:0 4px}#pageRange{width:min(270px,28vw);accent-color:#8d34b1}.thumbnail-drawer{position:fixed;top:0;bottom:0;right:0;width:min(390px,90vw);z-index:50;background:#11152e;border-left:1px solid rgba(255,255,255,.1);transform:translateX(105%);transition:.25s;display:flex;flex-direction:column;box-shadow:-25px 0 60px rgba(0,0,0,.35)}.lang-en .thumbnail-drawer{right:auto;left:0;transform:translateX(-105%);border-left:0;border-right:1px solid rgba(255,255,255,.1)}.thumbnail-drawer.open{transform:translateX(0)}.drawer-head{height:66px;padding:0 16px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(255,255,255,.1)}.drawer-head button{width:38px;height:38px;border:0;border-radius:11px;color:#fff;background:rgba(255,255,255,.08)}.thumbnail-grid{padding:14px;overflow:auto;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.thumb{border:2px solid transparent;border-radius:10px;background:#fff;overflow:hidden;cursor:pointer;padding:0;position:relative}.thumb.active{border-color:#ad48d1}.thumb img{display:block;width:100%;aspect-ratio:1.414/1;object-fit:cover}.thumb span{position:absolute;bottom:5px;right:5px;background:rgba(7,10,25,.8);color:#fff;font-size:8px;border-radius:7px;padding:3px 6px}.drawer-overlay{position:fixed;inset:0;background:rgba(0,0,0,.48);z-index:45;opacity:0;pointer-events:none;transition:.2s}.drawer-overlay.show{opacity:1;pointer-events:auto}.native-pdf{width:min(1200px,96vw);height:calc(100vh - 120px);position:relative}.native-pdf iframe{width:100%;height:100%;border:0;border-radius:12px;background:#fff}.native-pdf>a{position:absolute;bottom:12px;right:12px;padding:10px 15px;border-radius:12px;background:#4c4fc1;color:#fff;text-decoration:none;font-size:11px}@media(max-width:760px){.flipbook-header{height:62px;padding:0 9px;grid-template-columns:auto minmax(0,1fr) auto}.viewer-button{height:40px;min-width:40px;padding:0 10px}.viewer-button span,.download span{display:none}.viewer-title{justify-content:flex-start}.viewer-title img{width:34px;height:34px}.viewer-title strong{font-size:10px}.flipbook-stage{min-height:calc(100vh - 62px);padding:12px 8px 86px}.book-scene{height:auto;width:100%}.book-spread{width:100%;aspect-ratio:1.414/1;max-height:none}.book-page{display:none;border-radius:7px!important}.book-page.page-right{display:flex;flex:1}.book-gutter{display:none}.book-shadow{transform:translateY(29vw);height:35px}.page-flip{width:100%}.viewer-controls{bottom:10px;width:calc(100% - 16px);justify-content:center}.viewer-controls button{width:40px;height:40px}#pageRange{flex:1;width:auto}.page-counter{min-width:58px}.thumbnail-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}