.book-card {
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 2.5rem;
            background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
            border-radius: 1.25rem;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .book-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 5px;
            height: 100%;
            background: linear-gradient(to bottom, #0ea5e9, #0369a1);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .book-card:hover {
            transform: translateY(-8px) scale(1.01);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.08);
        }
        .book-card:hover::before {
            opacity: 1;
        }
        .book-image {
            width: 15rem;
            height: 22rem;
            object-fit: cover;
            border-radius: 0.875rem;
            box-shadow: 0 15px 30px -5px rgba(0, 0, 0, 0.25), 0 5px 10px -3px rgba(0, 0, 0, 0.1);
            margin-bottom: 2rem;
            transition: all 0.3s ease;
        }
        .book-card:hover .book-image {
            transform: rotate(2deg) scale(1.03);
            box-shadow: 0 20px 35px -5px rgba(0, 0, 0, 0.3), 0 8px 15px -5px rgba(0, 0, 0, 0.15);
        }
        .ranking-badge {
            position: absolute;
            top: 1.25rem;
            left: 1.25rem;
            background: linear-gradient(135deg, #0ea5e9 0%, #0369a1 100%);
            color: white;
            width: 2.5rem;
            height: 2.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-weight: bold;
            font-size: 1.25rem;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
            z-index: 10;
        }
        .content-section {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            width: 100%;
            text-align: left;
        }
        .content-section p {
            line-height: 1.6;
        }
        .content-section p strong {
            color: #0f172a;
            min-width: 130px;
            display: inline-block;
            font-weight: 600;
        }
        .tag {
            display: inline-block;
            padding: 0.35rem 0.85rem;
            background-color: #e0f2fe;
            color: #0369a1;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 500;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
        }
        @media (min-width: 768px) {
            .book-card {
                flex-direction: row;
                text-align: left;
                align-items: flex-start;
            }
            .book-card .book-image {
                flex-shrink: 0;
                margin-right: 2.5rem;
                margin-bottom: 0;
                width: 16rem;
            }
        }
        @media (max-width: 767px) {
            .book-card {
                padding: 1.5rem;
            }
            .book-image {
                width: 12rem;
                height: 18rem;
            }
        }
        .recommendation-section {
            background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
            border-radius: 1.25rem;
            padding: 3rem;
            margin-top: 4rem;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.5);
        }
        .category-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 2.5rem;
            justify-content: center;
        }
        .category-tab {
            padding: 0.875rem 1.75rem;
            background-color: #f8fafc;
            border-radius: 0.75rem;
            cursor: pointer;
            transition: all 0.3s ease;
            font-weight: 600;
            color: #64748b;
            border: 1px solid #e2e8f0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .category-tab:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            color: #0369a1;
            border-color: #bae6fd;
        }
        .category-tab.active {
            background: linear-gradient(135deg, #0ea5e9 0%, #0369a1 100%);
            color: white;
            border-color: #0ea5e9;
            box-shadow: 0 4px 6px -1px rgba(14, 165, 233, 0.3);
        }
        .book-recommendation {
            display: none;
            animation: fadeIn 0.5s ease;
            background: white;
            padding: 2rem;
            border-radius: 1rem;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            border-left: 4px solid #0ea5e9;
        }
        .book-recommendation.active {
            display: block;
        }
        @keyframes fadeIn {
            from { 
                opacity: 0; 
                transform: translateY(10px); 
            }
            to { 
                opacity: 1; 
                transform: translateY(0); 
            }
        }
        .footer {
            margin-top: 5rem;
            text-align: center;
            padding: 3rem 2rem;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            color: #e2e8f0;
            border-radius: 1.25rem;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        }
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 3.5rem;
            height: 3.5rem;
            background: linear-gradient(135deg, #0ea5e9 0%, #0369a1 100%);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(14, 165, 233, 0.4);
            cursor: pointer;
            opacity: 0;
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .back-to-top.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .back-to-top:hover {
            transform: translateY(-5px);
            box-shadow: 0 6px 20px rgba(14, 165, 233, 0.5);
        }
        .highlight {
            background-color: #fef3c7;
            padding: 0.2rem 0.5rem;
            border-radius: 0.25rem;
            font-weight: 500;
        }
        .stat-badge {
            display: inline-flex;
            align-items: center;
            background-color: #f0f9ff;
            color: #0369a1;
            padding: 0.5rem 1rem;
            border-radius: 0.5rem;
            font-weight: 500;
            margin-right: 0.75rem;
            margin-bottom: 0.75rem;
        }
        .stat-badge i {
            margin-right: 0.5rem;
        }
        .book-stats {
            display: flex;
            flex-wrap: wrap;
            margin: 1rem 0;
        }
        .book-action {
            display: inline-flex;
            align-items: center;
            background: linear-gradient(135deg, #0ea5e9 0%, #0369a1 100%);
            color: white;
            padding: 0.75rem 1.5rem;
            border-radius: 0.5rem;
            font-weight: 600;
            margin-top: 1.5rem;
            transition: all 0.3s ease;
        }
        .book-action:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(14, 165, 233, 0.4);
        }
        
        /* CSS to remove the "Get this book" buttons */
        .book-action {
            display: none !important;
        }