:root {
    --primary: #5146e5;
    --primary-dark: #4338ca;

    --dark: #101829;

    --text: #172033;
    --text-secondary: #64748b;

    --border: #dce3ed;

    --background: #f8f9fc;
    --white: #ffffff;
}

.catalog-page {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 30px 20px 50px;

    color: #26352d;
    font-family: Arial, Helvetica, sans-serif;
}


.catalog-page .catalog-layout {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
}


.catalog-page .catalog-sidebar {
    width: 100%;
}

.catalog-page .filter-box {
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
}

.catalog-page .filter-box:first-child {
    padding-top: 0;
}

.catalog-page .filter-title {
    margin: 0 0 15px;

    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.3px;

    color: #26352d;
}


/* =========================================================
   CATEGORY FILTER
   ========================================================= */

.catalog-page .category-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.catalog-page .category-item {
    display: flex;
    align-items: center;
    gap: 7px;

    cursor: pointer;

    font-size: 12px;
    color: #555f59;
}

.catalog-page .category-item input {
    width: 14px;
    height: 14px;

    accent-color: #101829;

    cursor: pointer;
}

.catalog-page .category-item span:first-of-type {
    flex: 1;
}

.catalog-page .category-count {
    min-width: 22px;
    padding: 2px 6px;

    border-radius: 10px;

    background: var(--primary);
    color: var(--white);

    font-size: 10px;
    text-align: center;
}


/* =========================================================
   AUTHOR SEARCH
   ========================================================= */

.catalog-page .author-search {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.catalog-page .author-search input {
    width: 100%;
    height: 34px;

    padding: 0 10px;

    border: 1px solid #dfe7e1;
    border-radius: 5px;

    outline: none;

    font-size: 12px;
}

.catalog-page .author-search input:focus {
    border-color: #101829;
}

.catalog-page .author-buttons {
    display: flex;
    gap: 6px;
}

.catalog-page .author-buttons button,
.catalog-page .author-buttons a {
    height: 32px;

    display: flex;
    align-items: center;
    justify-content: center;

    padding: 0 10px;

    border-radius: 5px;

    font-size: 11px;
    text-decoration: none;
}

.catalog-page .author-buttons button {
    border: none;

    background: var(--primary-dark);
    color: white;

    cursor: pointer;
}

.catalog-page .author-buttons a {
    border: 1px solid #dfe7e1;

    color: #59635d;
    background: white;
}


/* =========================================================
   PRICE FILTER
   ========================================================= */

.catalog-page .price-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.catalog-page .price-item {
    display: flex;
    align-items: center;
    gap: 8px;

    font-size: 12px;
    color: #59635d;

    cursor: pointer;
}

.catalog-page .price-item input {
    accent-color: var(--primary-dark);
}


/* =========================================================
   CLEAR FILTER
   ========================================================= */

.catalog-page .clear-filter {
    margin-top: 20px;
}

.catalog-page .clear-filter a {
    display: inline-block;

    font-size: 11px;
    color: #c34b4b;

    text-decoration: none;
}

.catalog-page .clear-filter a:hover {
    text-decoration: underline;
}


/* =========================================================
   CATALOG CONTENT
   ========================================================= */

.catalog-page .catalog-content {
    min-width: 0;
}


/* =========================================================
   CATALOG HEADER
   ========================================================= */

.catalog-page .catalog-header {
    min-height: 58px;

    display: flex;
    align-items: center;
    justify-content: space-between;

    margin-bottom: 18px;
    padding: 0 4px;
}

.catalog-page .catalog-heading h1 {
    margin: 0;

    font-size: 22px;
    font-weight: 700;

    color: #26352d;
}

.catalog-page .catalog-heading p {
    margin: 5px 0 0;

    font-size: 11px;
    color: #89918c;
}

.catalog-page .catalog-sort {
    display: flex;
    align-items: center;
    gap: 8px;

    font-size: 11px;
    color: #747c77;
}

.catalog-page .catalog-sort select {
    height: 32px;

    padding: 0 10px;

    border: 1px solid #e1e7e3;
    border-radius: 5px;

    background: white;

    color: #39443d;
    font-size: 11px;

    outline: none;
}


/* =========================================================
   BOOK GRID
   ========================================================= */

.catalog-page .book-grid {
    display: grid;

    grid-template-columns: repeat(3, minmax(0, 1fr));

    gap: 14px;
}


/* =========================================================
   BOOK CARD
   ========================================================= */

.catalog-page .book-card {
    overflow: hidden;

    border: 1px solid #e5ebe7;
    border-radius: 7px;

    background: #ffffff;

    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.catalog-page .book-card:hover {
    transform: translateY(-3px);

    box-shadow: 0 8px 20px rgba(31, 61, 43, 0.08);
}


/* =========================================================
   BOOK IMAGE
   ========================================================= */

.catalog-page .book-image {
    height: 190px;

    display: flex;
    align-items: center;
    justify-content: center;

    padding: 10px;

    background: var(--text-secondary);
}

.catalog-page .book-image img {
    width: 105px;
    height: 145px;

    object-fit: cover;

    border-radius: 3px;

    box-shadow: 0 5px 12px rgba(0, 0, 0, 0.15);

    transition: transform 0.2s ease;
}

.catalog-page .book-card:hover .book-image img {
    transform: scale(1.03);
}


/* =========================================================
   BOOK INFORMATION
   ========================================================= */

.catalog-page .book-info {
    padding: 12px 11px 13px;
}

.catalog-page .book-badge {
    display: inline-block;

    margin-bottom: 7px;
    padding: 3px 6px;

    border-radius: 3px;

    background: #eaf5ed;
    color: #101829;

    font-size: 9px;
    font-weight: 600;
}

.catalog-page .book-title {
    margin: 0;

    overflow: hidden;

    font-size: 13px;
    font-weight: 700;

    color: #2e3932;

    white-space: nowrap;
    text-overflow: ellipsis;
}

.catalog-page .book-author {
    margin: 5px 0 8px;

    overflow: hidden;

    font-size: 10px;
    color: #858d88;

    white-space: nowrap;
    text-overflow: ellipsis;
}


/* =========================================================
   RATING
   ========================================================= */

.catalog-page .book-rating {
    display: flex;
    align-items: center;
    gap: 5px;

    margin-bottom: 11px;
}

.catalog-page .stars {
    color: #f0a000;

    font-size: 11px;
    letter-spacing: -1px;
}

.catalog-page .rating-number {
    font-size: 9px;
    color: #969d99;
}


/* =========================================================
   PRICE + ADD BUTTON
   ========================================================= */

.catalog-page .book-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.catalog-page .book-price {
    margin: 0;

    font-size: 11px;
    font-weight: 700;

    color: var(--primary-dark);
}

.catalog-page .add-cart {
    width: 28px;
    height: 28px;

    display: flex;
    align-items: center;
    justify-content: center;

    border: none;
    border-radius: 50%;

    background: var(--primary-dark);
    color: var(--white);

    font-size: 18px;
    line-height: 1;

    cursor: pointer;

    transition:
        transform 0.2s ease,
        background 0.2s ease;
}

.catalog-page .add-cart:hover {
    transform: scale(1.08);

    background: #267344;
}


/* =========================================================
   EMPTY STATE
   ========================================================= */

.catalog-page .empty-books {
    padding: 50px 20px;

    border: 1px dashed #dce5df;
    border-radius: 7px;

    text-align: center;

    color: #89918c;
    font-size: 13px;
}


/* =========================================================
   PAGINATION
   ========================================================= */

.catalog-page .catalog-pagination {
    display: flex;
    justify-content: center;

    margin-top: 30px;
}

.catalog-page .catalog-pagination nav {
    display: flex;
    justify-content: center;
}

.catalog-page .catalog-pagination ul {
    display: flex;

    gap: 6px;

    margin: 0;
    padding: 0;

    list-style: none;
}

.catalog-page .catalog-pagination li {
    list-style: none;
}

.catalog-page .catalog-pagination a,
.catalog-page .catalog-pagination span {
    min-width: 30px;
    height: 30px;

    display: flex;
    align-items: center;
    justify-content: center;

    padding: 0 8px;

    border: 1px solid #e1e7e3;
    border-radius: 50%;

    background: white;

    color: #4c5750;

    font-size: 10px;
    text-decoration: none;
}

.catalog-page .catalog-pagination .active span {
    border-color: #267344;

    background: #267344;
    color: white;
}

.catalog-page .catalog-pagination a:hover {
    border-color: #267344;
    color: #267344;
}


/* =========================================================
   RESPONSIVE
   ========================================================= */

@media (max-width: 900px) {
    .catalog-page .catalog-layout {
        grid-template-columns: 180px minmax(0, 1fr);
        gap: 20px;
    }

    .catalog-page .book-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}


@media (max-width: 650px) {
    .catalog-page {
        padding: 20px 15px 40px;
    }

    .catalog-page .catalog-layout {
        grid-template-columns: 1fr;
    }

    .catalog-page .catalog-sidebar {
        order: 2;
    }

    .catalog-page .catalog-content {
        order: 1;
    }

    .catalog-page .catalog-header {
        align-items: flex-start;
        flex-direction: column;
        gap: 12px;
    }

    .catalog-page .book-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}


@media (max-width: 420px) {
    .catalog-page .book-grid {
        grid-template-columns: 1fr;
    }

    .catalog-page .book-image {
        height: 220px;
    }

    .catalog-page .book-image img {
        width: 120px;
        height: 165px;
    }
}