.textbooks-catalog-page{padding-bottom:60px}.catalog-hero{text-align:center;max-width:900px;margin:0 auto;padding:30px 10px 36px}.hero-badge{color:#4338ca;background:#eef2ff;border:1px solid #c7d2fe;border-radius:999px;align-items:center;gap:6px;margin-bottom:16px;padding:6px 14px;font-size:.85rem;font-weight:600;display:inline-flex}[data-theme=dark] .hero-badge{color:#a5b4fc;background:#6366f126;border-color:#6366f14d}.hero-title{color:var(--text-primary,#0f172a);margin-bottom:16px;font-size:2.75rem;font-weight:800;line-height:1.2}[data-theme=dark] .hero-title{color:#f8fafc}.gradient-text{background:linear-gradient(135deg,#4f46e5 0%,#7c3aed 50%,#db2777 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text}.hero-description{color:var(--text-secondary,#475569);margin-bottom:30px;font-size:1.125rem;line-height:1.6}[data-theme=dark] .hero-description{color:#94a3b8}.grades-nav-wrapper{flex-direction:column;align-items:center;gap:10px;margin-bottom:26px;display:flex}.grades-label{color:var(--text-muted,#64748b);text-transform:uppercase;letter-spacing:.05em;font-size:.82rem;font-weight:700}.grades-list{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;display:flex}.grade-pill{border-radius:999px;align-items:center;gap:6px;padding:6px 14px;font-size:.85rem;font-weight:600;text-decoration:none;transition:all .2s;display:inline-flex}.grade-pill-active{color:#fff;background:#4f46e5;box-shadow:0 2px 10px #4f46e559}.active-dot{background:#4ade80;border-radius:50%;width:6px;height:6px;box-shadow:0 0 8px #4ade80}.count-badge{background:#ffffff40;border-radius:999px;padding:2px 7px;font-size:.72rem;font-weight:700}.grade-pill-disabled{color:#64748b;border:1px solid var(--border-color,#e2e8f0);cursor:not-allowed;background:#f1f5f9}[data-theme=dark] .grade-pill-disabled{color:#94a3b8;background:#ffffff0d;border-color:#ffffff14}.soon-badge{text-transform:uppercase;color:#475569;background:#e2e8f0;border-radius:4px;padding:2px 6px;font-size:.65rem;font-weight:700}[data-theme=dark] .soon-badge{color:#cbd5e1;background:#ffffff1a}.search-bar-wrapper{max-width:700px;margin:0 auto}.search-input-box{border:1px solid var(--border-color,#e2e8f0);background:#fff;border-radius:14px;align-items:center;padding:6px 16px;transition:all .2s;display:flex;position:relative;box-shadow:0 4px 16px #0000000d}[data-theme=dark] .search-input-box{background:#1e293b;border-color:#ffffff1f;box-shadow:0 4px 20px #0006}.search-input-box:focus-within{border-color:#6366f1;box-shadow:0 0 0 3px #6366f133,0 8px 24px #00000014}.search-icon{color:var(--text-muted,#64748b);flex-shrink:0;margin-right:12px}.search-input-box input{width:100%;color:var(--text-primary,#0f172a);background:0 0;border:none;outline:none;padding:8px 0;font-size:.95rem}[data-theme=dark] .search-input-box input{color:#f8fafc}.search-input-box input::placeholder{color:var(--text-muted,#94a3b8)}.btn-clear{color:#475569;cursor:pointer;background:#e2e8f0;border:none;border-radius:50%;justify-content:center;align-items:center;width:24px;height:24px;margin-left:8px;font-size:.8rem;transition:all .15s;display:flex}.btn-clear:hover{color:#0f172a;background:#cbd5e1}[data-theme=dark] .btn-clear{color:#cbd5e1;background:#ffffff26}[data-theme=dark] .btn-clear:hover{color:#fff;background:#ffffff40}.subjects-nav{border:1px solid var(--border-color,#e2e8f0);background:#fff;border-radius:16px;margin:20px 0 32px;padding:18px 22px;box-shadow:0 2px 10px #0000000a}[data-theme=dark] .subjects-nav{background:#0f172a;border-color:#1e293b;box-shadow:0 4px 20px #0006}.subjects-header{justify-content:space-between;align-items:center;margin-bottom:14px;font-size:.85rem;display:flex}.filter-label{color:var(--text-primary,#0f172a);text-transform:uppercase;letter-spacing:.03em;font-weight:700}[data-theme=dark] .filter-label{color:#f8fafc}.books-counter{color:var(--text-muted,#64748b);font-weight:500}.books-counter strong{color:#4f46e5;font-weight:700}[data-theme=dark] .books-counter strong{color:#818cf8}.subject-pills-list{flex-wrap:wrap;gap:8px;display:flex}.subject-pill{border:1px solid var(--border-color,#e2e8f0);color:#334155;cursor:pointer;background:#f1f5f9;border-radius:8px;align-items:center;gap:6px;padding:6px 12px;font-size:.82rem;font-weight:600;transition:all .15s;display:inline-flex}.subject-pill:hover{color:#4338ca;background:#e0e7ff;border-color:#c7d2fe}[data-theme=dark] .subject-pill{color:#cbd5e1;background:#1e293b;border-color:#ffffff14}[data-theme=dark] .subject-pill:hover{color:#fff;background:#ffffff1f;border-color:#ffffff2e}.subject-pill.active{box-shadow:0 2px 8px #4f46e559;color:#fff!important;background:#4f46e5!important;border-color:#4f46e5!important}.pill-badge{color:inherit;background:#0000000f;border-radius:999px;padding:1px 6px;font-size:.72rem;font-weight:700}.subject-pill.active .pill-badge{color:#fff;background:#ffffff40}[data-theme=dark] .subject-pill .pill-badge{background:#ffffff1a}.textbooks-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px;display:grid}.empty-state{text-align:center;border:1px dashed var(--border-color,#cbd5e1);background:#fff;border-radius:16px;margin:30px 0;padding:60px 20px}[data-theme=dark] .empty-state{background:#1e293b;border-color:#ffffff26}.empty-icon{margin-bottom:12px;font-size:3rem}.empty-state h3{color:var(--text-primary,#0f172a);margin-bottom:8px;font-size:1.3rem}[data-theme=dark] .empty-state h3{color:#f8fafc}.empty-state p{color:var(--text-secondary,#64748b);max-width:500px;margin:0 auto 20px}.btn-reset-filters{color:#fff;cursor:pointer;background:#4f46e5;border:none;border-radius:8px;padding:8px 18px;font-weight:600;transition:background .15s}.btn-reset-filters:hover{background:#4338ca}.seo-info-box{border:1px solid var(--border-color,#e2e8f0);background:#fff;border-radius:20px;margin-top:60px;padding:36px 30px;box-shadow:0 2px 10px #0000000a}[data-theme=dark] .seo-info-box{background:#0f172a;border-color:#1e293b;box-shadow:0 4px 20px #0006}.seo-info-box h2{color:var(--text-primary,#0f172a);margin-bottom:14px;font-size:1.5rem;font-weight:700}[data-theme=dark] .seo-info-box h2{color:#f8fafc}.seo-info-box p{color:var(--text-secondary,#475569);margin-bottom:24px;line-height:1.6}[data-theme=dark] .seo-info-box p{color:#94a3b8}.info-features{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;display:grid}.feature-item{border:1px solid var(--border-color,#e2e8f0);background:#f8fafc;border-radius:12px;padding:18px}[data-theme=dark] .feature-item{background:#1e293b;border-color:#ffffff0f}.feature-icon{margin-bottom:10px;font-size:1.8rem;display:block}.feature-item h4{color:var(--text-primary,#0f172a);margin-bottom:6px;font-size:1.05rem;font-weight:600}[data-theme=dark] .feature-item h4{color:#f1f5f9}.feature-item p{color:var(--text-secondary,#64748b);margin:0;font-size:.85rem;line-height:1.5}@media (width<=640px){.hero-title{font-size:2rem}.textbooks-grid{grid-template-columns:1fr}}