.gdf-flipbook{--gdf-book-bg:#e8e8e8;--gdf-page-bg:#fff;--gdf-page-text:#222;--gdf-control-bg:#222;--gdf-control-text:#fff;--gdf-border:#bbb;--gdf-shadow:0 12px 28px rgba(0,0,0,.22);--gdf-focus:#2271b1;--gdf-page-gap:4px;--gdf-animation:420ms;box-sizing:border-box;background:var(--gdf-book-bg);padding:1rem;color:var(--gdf-page-text);container-type:inline-size}.gdf-flipbook *{box-sizing:border-box}.gdf-flipbook__viewport{height:var(--gdf-reader-height,720px);max-height:80vh;position:relative;perspective:1800px}.gdf-flipbook__spread{display:grid;grid-template-columns:1fr 1fr;gap:var(--gdf-page-gap);height:100%;max-width:calc(var(--gdf-reader-height)*1.5);margin:auto}.gdf-flipbook__page{position:relative;background:var(--gdf-page-bg);box-shadow:var(--gdf-shadow);padding:clamp(1rem,3vw,2.5rem);overflow:auto;animation:gdf-turn var(--gdf-animation) ease}.gdf-flipbook__page[aria-hidden=true]{display:none}.gdf-flipbook__page-content{min-height:100%}.gdf-flipbook__loading{position:absolute;inset:45% 0 auto;text-align:center}.gdf-flipbook__controls{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:.5rem;margin-top:1rem}.gdf-flipbook__controls button{border:1px solid var(--gdf-border);border-radius:3px;background:var(--gdf-control-bg);color:var(--gdf-control-text);padding:.55rem .8rem;cursor:pointer}.gdf-flipbook button:focus-visible,.gdf-flipbook a:focus-visible{outline:3px solid var(--gdf-focus);outline-offset:2px}.gdf-flipbook__thumbnails{display:flex;gap:.5rem;overflow:auto;padding:1rem}.gdf-flipbook__thumbnails button{min-width:110px;border:2px solid transparent;background:var(--gdf-page-bg);padding:.5rem;color:inherit}.gdf-flipbook__thumbnails button[aria-current=true]{border-color:var(--gdf-focus)}.gdf-flipbook__thumbnails img{display:block;width:80px;height:80px;object-fit:cover;margin:auto}.gdf-flipbook:fullscreen{width:100vw;height:100vh;overflow:auto}.gdf-flipbook:fullscreen .gdf-flipbook__viewport{max-height:none;height:calc(100vh - 9rem)}@keyframes gdf-turn{from{opacity:.45;transform:rotateY(-8deg)}to{opacity:1;transform:none}}@media(max-width:768px){.gdf-flipbook__spread{grid-template-columns:1fr}.gdf-flipbook__viewport{max-height:75vh}}@media(prefers-reduced-motion:reduce){.gdf-flipbook__page{animation:none!important}.gdf-flipbook *{scroll-behavior:auto!important}}@media print{.gdf-flipbook__controls,.gdf-flipbook__thumbnails{display:none!important}.gdf-flipbook__viewport{height:auto;max-height:none}.gdf-flipbook__spread{display:block;max-width:none}.gdf-flipbook__page{display:block!important;overflow:visible;box-shadow:none;break-after:page}}