.card-img-top {
    height: 200px;
    object-fit: cover;
}

/* Mobile category sidebar */
@media (max-width: 991.98px) {
    #categorySidebar {
        position: relative;
        z-index: 1000;
        background: white;
    }
}

/* Smooth transitions for category sidebar */
#categorySidebar {
    transition: all 0.3s ease;
}

/* Book item hover effect */
.book-item .card {
    transition: transform 0.2s ease;
}

.book-item .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* Active category highlight */
.list-group-item.active {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

/* Admin panel styles */
.table-responsive {
    overflow-x: auto;
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}