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.2s;font-family:var(--font)}.genre-tab:hover{border-color:var(--blue);color:var(--blue)}.genre-tab--active{background:var(--blue);border-color:var(--blue);color:#fff}.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}.book-card{background:var(--dark-3);padding:1.75rem;text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:.5rem;transition:background .2s}.book-card:hover{background:#2a2d30}.book-genre-badge{display:inline-block;padding:.2rem .65rem;border-radius:3px;background:#5b8fa81f;color:var(--blue);font-size:.7rem;font-weight:700;letter-spacing:.06em;align-self:flex-start}.book-title{font-size:1rem;font-weight:800;color:var(--cream);line-height:1.35}.book-author{font-size:.8rem;color:var(--muted)}.book-desc{font-size:.88rem;color:var(--muted);line-height:1.75;flex:1}.book-link-label{font-size:.8rem;font-weight:700;color:var(--gold);margin-top:.25rem}.book-card:hover .book-link-label{color:#f0ae20}.back-to-top{position:fixed;bottom:2rem;right:2rem;z-index:200;width:44px;height:44px;border-radius:8px;border:none;background:var(--dark-3);color:var(--gold);font-size:1rem;font-weight:700;cursor:pointer;box-shadow:0 4px 20px #0006;opacity:0;transform:translateY(8px);pointer-events:none;transition:opacity .3s,transform .3s;display:flex;align-items:center;justify-content:center;border:1px solid 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