=== zen_get_brand_checkbox_html ===
function zen_get_brand_checkbox_html( $cat_slugs, $selected_brands = array() ) {
    $brands = zen_get_cascaded_brands( $cat_slugs );

    $html  = '<label class="filter-checkbox-item filter-all-item">';
    $html .= '<input type="checkbox" class="filter-all-checkbox" data-group="product_brand" ' . ( empty( $selected_brands ) ? 'checked' : '' ) . '>';
    $html .= '<span class="custom-check"></span>';
    $html .= '<span class="filter-label"><strong>All Brands</strong></span>';
    $html .= '</label>';

    if ( empty( $brands ) || is_wp_error( $brands ) ) {
        return $html;
    }

    foreach ( $brands as $brand ) {
        $checked_parent = in_array( $brand->slug, $selected_brands ) ? 'checked' : '';

        $html .= '<label class="filter-checkbox-item parent-brand">';
        $html .= '<input type="checkbox" name="product_brand" value="' . esc_attr( $brand->slug ) . '" ' . $checked_parent . '>';
        $html .= '<span class="custom-check"></span>';
        $html .= '<span class="filter-label"><strong>' . esc_html( $brand->name ) . '</strong></span>';
        $html .= '<span class="filter-count">' . esc_html( $brand->count ) . '</span>';
        $html .= '</label>';

        $sub_brands = isset( $brand->zen_children ) ? $brand->zen_children : array();
        if ( !empty( $sub_brands ) && !is_wp_error( $sub_brands ) ) {
            $html .= '<div class="sub-brand-list" style="padding-left:15px;">';
            foreach ( $sub_brands as $sub ) {
                $checked_child = in_array( $sub->slug, $selected_brands ) ? 'checked' : '';
                $html .= '<label class="filter-checkbox-item child-brand">';
                $html .= '<input type="checkbox" name="product_brand" value="' . esc_attr( $sub->slug ) . '" ' . $checked_child . '>';
                $html .= '<span class="custom-check"></span>';
                $html .= '<span class="filter-label">' . esc_html( $sub->name ) . '</span>';
                $html .= '<span class="filter-count">' . esc_html( $sub->count ) . '</span>';
                $html .= '</label>';
            }
            $html .= '</div>';
        }
    }
    return $html;
}

/**
 * SHOP PAGE — Map of brand slug => associated Solution (category) slugs.
 * Powers the sidebar behaviour where checking a Brand first auto-selects
 * the Solution(s) that brand's products actually belong to.
 */
function zen_get_brand_category_map() {
    $map = array();

    $product_ids = get_posts( array( 'post_type' => 'product', 'posts_per_page' => -1, 'fields' => 'ids' ) );
    if ( empty( $product_ids ) ) {
        return $map;
    }

    $brand_pairs = wp_get_object_terms( $product_ids, 'product_brand', array( 'fields' => 'all_with_object_id' ) );
    $cat_pairs   = wp_get_object_terms( $product_ids, 'product_cat', array( 'fields' => 'all_with_object_id' ) );

    if ( is_wp_error( $brand_pairs ) || is_wp_error( $cat_pairs ) ) {
        return $map;
    }

    $cats_by_product = array();
    foreach ( $cat_pairs as $cp ) {
        if ( is_wp_error( $cp ) || $cp->slug === 'uncategorized' ) { continue; }
        if ( !isset( $cats_by_product[ $cp->object_id ] ) ) { $cats_by_product[ $cp->object_id ] = array(); }
        $cats_by_product[ $cp->object_id ][] = $cp->slug;
    }

    foreach ( $brand_pairs as $bp ) {
        if ( is_wp_error( $bp ) ) { continue; }
        $cat_slugs = isset( $cats_by_product[ $bp->object_id ] ) ? $cats_by_product[ $bp->object_id ] : array();
        if ( empty( $cat_slugs ) ) { continue; 


=== zen_ajax_filter_products ===
function zen_ajax_filter_products() {
    $tax_query = array();

    if ( !empty($_POST['product_cat']) ) {
        $tax_query[] = array(
            'taxonomy' => 'product_cat',
            'field'    => 'slug',
            'terms'    => explode(',', sanitize_text_field(wp_unslash($_POST['product_cat']))),
            'operator' => 'IN',
        );
    }

    if ( !empty($_POST['product_brand']) ) {
        $tax_query[] = array(
            'taxonomy' => 'product_brand',
            'field'    => 'slug',
            'terms'    => explode(',', sanitize_text_field(wp_unslash($_POST['product_brand']))),
            'operator' => 'IN',
        );
    }

        if ( !empty($_POST['product_technology']) ) {
        $tax_query[] = array(
            'taxonomy'  => 'pa_technology',
            'field'     => 'slug',
            'terms'     => explode(',', sanitize_text_field(wp_unslash($_POST['product_technology']))),
            'operator'  => 'IN',
        );
    }

    if ( !empty($_POST['product_connectivity']) ) {
        $tax_query[] = array(
            'taxonomy'  => 'pa_connectivity',
            'field'     => 'slug',
            'terms'     => explode(',', sanitize_text_field(wp_unslash($_POST['product_connectivity']))),
            'operator'  => 'IN',
        );
    }

    $paged   = !empty($_POST['paged']) ? absint($_POST['paged']) : 1;
    $sort_by = !empty($_POST['sort_by']) ? sanitize_text_field(wp_unslash($_POST['sort_by'])) : '';

    $result = zen_shop_render_products( $tax_query, $paged, $sort_by );

    $posted_cats = !empty($_POST['product_cat']) ? explode(',', sanitize_text_field(wp_unslash($_POST['product_cat']))) : array();
    $cat_single = ( count($posted_cats) === 1 ) ? trim($posted_cats[0]) : '';
    $posted_brands = !empty($_POST['product_brand']) ? explode(',', sanitize_text_field(wp_unslash($_POST['product_brand']))) : array();
    $brand_single = ( count($posted_brands) === 1 ) ? trim($posted_brands[0]) : '';
    $result['brand_options_html'] = zen_get_brand_options_html( $posted_cats, $brand_single );
    $result['brand_checkboxes_html'] = zen_get_brand_checkbox_html( $posted_cats, $posted_brands );
    $result['hero_title_line1'] = zen_get_hero_title_line1( $posted_cats, $posted_brands );
    $result['active_filter_summary'] = zen_get_active_filter_summary( $posted_cats, $posted_brands );

    wp_send_json_success( $result );
}


/* ============================================================
   SHOP PAGE — Brand dropdown options (cascading with Solutions)
   Shared by the initial page render and the AJAX filter handler
   so both stay in sync automatically.
   ============================================================ */
function zen_get_cascaded_brands( $cat_slugs ) {
    $cat_slugs = array_values( array_filter( array_map( 'trim', (array) $cat_slugs ) ) );

    if ( !empty( $cat_slugs ) ) {
        $product_ids = get_posts( array(
            'post_type'        => 'product',
            'posts_per_page'   => -1,
            'fields'           => 'ids',
            'tax_query'        => array( array(
                'taxonomy'   => 'product_cat',
                'field'      => 'slug',
                'terms'      => $cat_slugs,
                'operator'   => 'IN',
            ) ),
        ) );

        $brands_raw = !empty( $product_ids )
            ? wp_get_object_terms( $product_ids, 'product_brand', array( 'fields' => 'all_with_object_id' ) )
            : array();

        // Tally how many of the


=== zen_shop_render_products ===
function zen_shop_render_products( $tax_query, $paged = 1, $sort_by = '' ) {
    $args = array(
        'post_type'      => 'product',
        'posts_per_page' => 36,
        'paged'          => $paged,
        'tax_query'      => $tax_query,
    );

    if ( $sort_by === 'date' ) {
        $args['orderby'] = 'date';
        $args['order'] = 'DESC';
    } elseif ( $sort_by === 'title' ) {
        $args['orderby'] = 'title';
        $args['order'] = 'ASC';
    } elseif ( $sort_by === 'popularity' ) {
        $args['meta_key'] = 'total_sales';
        $args['orderby'] = 'meta_value_num';
    }

    $query = new WP_Query( $args );

    ob_start();
    $zen_cat_brand_cache = array();
    ?>
<div class="products-grid" id="productsGrid">
              
            <!-- ══════════ ENTERPRISE SSD ══════════ -->
            <?php if ($query->have_posts()): ?>
                
            <?php while ($query->have_posts()): $query->the_post(); global $product; ?>
			  
			<?php
			 $is_active_link = get_field('is_active_link',get_the_ID());

			$newness_days = 30;

			$created = strtotime($product->get_date_created());
			$is_new = ( time() - $created ) < ( $newness_days * DAY_IN_SECONDS );
			
			$total_sales = $product->get_total_sales();
			$is_popular = $total_sales > 50; // adjust threshold
			?>
			  
            <!-- Product 1 -->
            <?php
			$card_cat_terms = get_the_terms( get_the_ID(), 'product_cat' );
			$card_cat_terms = ( $card_cat_terms && !is_wp_error( $card_cat_terms ) ) ? array_values( array_filter( $card_cat_terms, function( $t ) { return $t->slug !== 'uncategorized'; } ) ) : array();

			$card_brand_terms = get_the_terms( get_the_ID(), 'product_brand' );
			$card_brand_terms = ( $card_brand_terms && !is_wp_error( $card_brand_terms ) ) ? $card_brand_terms : array();
			$card_brand_top = null;
			if ( count( $card_brand_terms ) >= 1 ) {
				$first_brand_term = $card_brand_terms[0];
				$card_brand_top = $first_brand_term->parent ? get_term( $first_brand_term->parent, 'product_brand' ) : $first_brand_term;
			}

			$card_solution_label = 'Generic';
			$card_brand_label    = ( $card_brand_top && !is_wp_error( $card_brand_top ) ) ? $card_brand_top->name : '';

			if ( count( $card_cat_terms ) === 1 ) {
				$cat_slug = $card_cat_terms[0]->slug;
				$brand_matches_cat = true;

				if ( $card_brand_top && !is_wp_error( $card_brand_top ) ) {
					if ( !isset( $zen_cat_brand_cache[ $cat_slug ] ) ) {
						$cat_brand_terms = zen_get_cascaded_brands( $cat_slug );
						$zen_cat_brand_cache[ $cat_slug ] = is_array( $cat_brand_terms ) ? wp_list_pluck( $cat_brand_terms, 'term_id' ) : array();
					}
					$brand_matches_cat = in_array( $card_brand_top->term_id, $zen_cat_brand_cache[ $cat_slug ] );
				}

				if ( $brand_matches_cat ) {
					$card_solution_label = $card_cat_terms[0]->name;
				}
			}
			?>
            <!-- Product 1 -->
            <div class="prod-card" data-brand="<?php echo esc_attr( $card_brand_label ); ?>" data-category="<?php echo esc_attr( $card_solution_label ); ?>" data-pricing="" data-new="<?php echo $is_new ? 'true' : 'false'; ?>" data-name="<?php echo esc_attr( get_the_title() ); ?>">
              <div class="prod-badges">

					<?php if ($is_popular): ?>
						<span class="badge-popular">Popular</span>
					<?php endif; ?>

					<?php if ($is_new): ?>
						<span class="badge-new">New</span>
					<?php endif; ?>

				</div>
               <a href="<?php echo ($is_active_link=='Yes')?get_the_permalink():'j