:body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f5f5f5;
    color: #333;
}

header {
    background: #2c3e50;
    color: #fff;
    padding: 1rem;
    text-align: center;
}

main {
    padding: 2rem;
}

.section {
    display: none;
    flex-direction: column;
    gap: 1rem;
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

button {
    padding: 0.5rem 1rem;
    font-size: 1rem;
    margin: 0.5rem;
    cursor: pointer;
    background: #2980b9;
    color: white;
    border: none;
    border-radius: 5px;
    transition: 0.2s;
}

button:hover {
    background: #3498db;
}

.book-details {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.book-details img {
    width: 200px;
    height: 300px;
    object-fit: cover;
    border: 1px solid #ccc;
}

.book-info {
    max-width: 600px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

th, td {
    border: 1px solid #ccc;
    padding: 0.5rem;
    text-align: left;
}

th {
    background: #ecf0f1;
}

.shop-link {
    color: #2980b9;
    text-decoration: none;
}

.shop-link:hover {
    text-decoration: underline;
}

#recommendations-list p {
    background: #ecf0f1;
    padding: 0.5rem;
    border-radius: 5px;
}