:root{--bg:#0b0f14;--panel:#10161d;--ink:#e7edf5;--muted:#8fa3b5;--accent:#4cc9f0;--animate-duration:0.5s;--thumbs-h:clamp(130px, 32vh, 130px);--stage-pad:clamp(10px, 2vw, 24px)}body,html{height:100%;overflow:hidden}body{margin:0;color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial,sans-serif;background-color:rgba(0,0,0,.8);background-repeat:no-repeat;background-size:cover;background-blend-mode:multiply;backdrop-filter:blur(10px)}.wrap{min-height:calc(100% - 47px);display:flex;flex-direction:column;justify-content:center}.topbar{z-index:20}.toolbar .btn{color:var(--ink);border-color:rgba(255,255,255,.12);backdrop-filter:blur(8px);background:color-mix(in srgb,var(--panel) 30%,transparent)}.toolbar .btn:hover{border-color:var(--accent)}.toolbar .btn:active{transform:translateY(1px)}.zoom-badge{background:#0f172a;border:1px solid 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1fr;opacity:0;will-change:transform,opacity}.thumbs-panel.open{transform:translateY(0);opacity:1}.thumbs-inner{padding:10px 0 6px 0;overflow:auto;display:flex;gap:6px}.thumb-item{list-style:none;border:1px solid rgba(255,255,255,.12);background:#0f172a;border-radius:10px;padding:6px;display:grid;grid-template-rows:1fr auto;align-items:center;text-align:center;cursor:pointer;transition:transform 140ms ease,border-color 140ms ease,box-shadow 140ms ease}.thumb-item:focus-visible,.thumb-item:hover{transform:translateY(-2px);border-color:var(--accent);box-shadow:0 6px 16px rgba(0,0,0,.35);outline:0}.thumb-label{padding-top:20px;margin-top:6px;font-size:12px;color:var(--muted);text-align:center;position:absolute;background-image:-webkit-gradient(linear,left top,left bottom,from(transparent),to(#000));background-image:linear-gradient(180deg,transparent,#000);width:100%;bottom:0;border-bottom-left-radius:10px;border-bottom-right-radius:10px}.thumb-item.active{border-color:var(--accent);box-shadow:0 0 0 2px color-mix(in srgb,var(--accent) 40%,transparent)}.spread-pages{display:flex;align-items:center;justify-content:center;gap:1px}.thumb-item.spread{grid-auto-columns:minmax(140px,260px)}.spread-pages .thumb-canvas{width:60px;display:block;min-width:60px}.spread-pages .thumb-canvas.blank{opacity:.28;outline:1px dashed rgba(255,255,255,.18)}.thumbs-inner .thumb-item.spread{max-width:146px;position:relative;padding:6px 0}.thumb-item.spread.single .spread-pages .thumb-canvas{min-width:60px}@keyframes thumb-click{0%{transform:scale(1)}50%{transform:scale(.96)}100%{transform:scale(1)}}.thumb-item.anim-click .spread-pages,.thumb-item.anim-click .thumb-canvas{animation:thumb-click 360ms 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