.book-hub{max-width:78rem;margin:0 auto;padding:2rem 1.5rem 4rem}.book-hub-intro{max-width:52rem;margin:0 auto 2rem;text-align:center}.book-hub-intro h1{font-size:2.5rem;font-weight:800;margin-bottom:.6rem}.book-hub-intro p{color:#64748b;font-size:1.08rem}.book-collection-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:1.25rem}.book-collection-card{text-decoration:none;border:1px solid #e2e8f0;border-radius:.8rem;overflow:hidden;background:#fff;transition:transform .2s ease,box-shadow .2s ease}.book-collection-card:hover{transform:translateY(-3px);box-shadow:0 10px 24px rgba(15,23,42,.1)}.book-collection-card img{display:block;width:100%;aspect-ratio:2/3;object-fit:cover}.book-collection-card div{padding:.8rem}.book-collection-card h2{margin:0 0 .25rem;font-size:1rem;color:#0f172a}.book-collection-card p{margin:0;font-size:.8rem;color:#64748b}.book-breadcrumb{font-size:.875rem;color:#64748b;margin-bottom:1.5rem}.book-breadcrumb span{margin:0 .25rem}.book-hero{display:grid;grid-template-columns:190px 1fr;gap:2rem;align-items:start;margin-bottom:2.5rem}.book-cover{width:190px;aspect-ratio:2/3;object-fit:cover;border-radius:.75rem;box-shadow:0 14px 30px rgba(15,23,42,.16)}.book-kicker{font-size:.8rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:#64748b;margin:0 0 .4rem}.book-title{font-size:clamp(2.1rem,5vw,3.4rem);line-height:1.05;font-weight:800;margin:0 0 .6rem;color:#0f172a}.dark .book-title{color:#f8fafc}.book-author{font-size:1.15rem;color:#64748b;margin:0 0 1rem}.book-description{font-size:1.05rem;line-height:1.7;color:#475569;max-width:48rem}.dark .book-description{color:#cbd5e1}.book-actions{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1.25rem}.book-btn{display:inline-flex;align-items:center;padding:.7rem 1rem;border-radius:.65rem;font-weight:700;text-decoration:none;border:1px solid #cbd5e1}.book-btn-primary{background:#2563eb;color:#fff !important;border-color:#2563eb}.book-btn-secondary{color:#334155 !important;background:0 0}.dark .book-btn-secondary{color:#e2e8f0 !important;border-color:#475569}.book-section{margin-top:2.5rem}.book-section h2{font-size:1.6rem;font-weight:800;margin-bottom:.9rem}.book-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem}.book-card{display:block;padding:1.1rem;border:1px solid #e2e8f0;border-radius:.8rem;text-decoration:none;background:#fff}.dark .book-card{background:#111827;border-color:#334155}.book-card h3{margin:0 0 .35rem;font-size:1rem;font-weight:750;color:#0f172a}.dark .book-card h3{color:#f8fafc}.book-card p{margin:0;font-size:.9rem;line-height:1.5;color:#64748b}.dark .book-card p{color:#94a3b8}.book-meta{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1rem}.book-pill{font-size:.78rem;padding:.3rem .55rem;border-radius:999px;background:#f1f5f9;color:#475569;text-decoration:none}.dark .book-pill{background:#1e293b;color:#cbd5e1}.book-empty{color:#64748b}@media(max-width:640px){.book-hub{padding:1.25rem 1rem 3rem}.book-hero{grid-template-columns:110px 1fr;gap:1rem}.book-cover{width:110px}.book-title{font-size:2rem}.book-description{font-size:.98rem}.book-collection-grid{grid-template-columns:repeat(2,1fr)}}