.pb-books-list .pb-book {
    border: 1px solid #ddd;
    padding: 15px;
    margin-bottom: 20px;
}
.pb-filter-form {
    margin-bottom: 20px;
}
.pb-filter-form input[type="text"] {
    width: 200px;
    padding: 8px;
}
.pb-filter-table {
    width: 100%;
    border-collapse: collapse;
}
.pb-filter-table td {
    width: 25%;
    padding: 10px;
    vertical-align: top;
}
.pb-books-table {
    width: 100%;
    border-collapse: collapse;
}
.pb-books-table th, .pb-books-table td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: left;
}
.pb-books-table th {
    background-color: #f2f2f2;
}
.pb-pagination {
    margin-top: 20px;
    text-align: center;
}
.pb-pagination a {
    margin: 0 5px;
}
.pb-book-details, .pb-request-form {
    margin: 20px 0;
}
.pb-request-form input[type="text"],
.pb-request-form input[type="email"],
.pb-request-form input[type="tel"],
.pb-request-form textarea {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
}
.pb-request-form input[type="submit"] {
    background: #0073aa;
    color: #fff;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
}
.pb-request-form input[type="submit"]:hover {
    background: #005177;
}
.pb-notice.success {
    background: #dff0d8;
    color: #3c763d;
    padding: 10px;
    margin: 10px 0;
}
.pb-notice.error {
    background: #f2dede;
    color: #a94442;
    padding: 10px;
    margin: 10px 0;
}
.pb-like-button {
    background: #f0f0f0;
    border: 1px solid #ccc;
    padding: 5px 10px;
    cursor: pointer;
}
.pb-like-button:hover {
    background: #e0e0e0;
}
.pb-borrow-button {
    background: #007bff;
    color: #fff;
    padding: 5px 10px;
    text-decoration: none;
    border-radius: 3px;
    display: inline-block;
}
.pb-borrow-button:hover {
    background: #0056b3;
}
.pb-import-form {
    margin: 20px 0;
}
.pb-import-form input[type="file"] {
    margin: 10px 0;
}