.book-gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .book-gallery {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
}

@media (max-width: 480px) {
    .book-gallery {
        grid-template-columns: 1fr;
        gap: 10px;
    }
}

.book-item {
    text-align: center;
    transition: transform 0.3s ease;
}

.book-item:hover {
    transform: translateY(-5px);
}

.book-cover-container {
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    transition: box-shadow 0.3s ease;
}

.book-cover-container:hover {
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
}

.book-front-cover,
.book-back-cover {
    width: 100%;
    height: auto;
    display: block;
    transition: opacity 0.3s ease;
}

.book-back-cover {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
}

.book-cover-container.has-back-cover:hover .book-back-cover {
    opacity: 1;
}

.book-cover-container.has-back-cover:hover .book-front-cover {
    opacity: 0;
}

.book-order-list {
    list-style: none;
    padding: 0;
    margin: 20px 0;
}

.book-order-list li {
    background: #f9f9f9;
    border: 1px solid #ddd;
    margin: 5px 0;
    padding: 10px;
    cursor: move;
}

.book-order-list li:hover {
    background: #f0f0f0;
}

.book-order-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.book-order-item img {
    width: 50px;
    height: auto;
}

.book-order-list .ui-sortable-helper {
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}