diff --git a/tools/av-add-submenus.php b/tools/av-add-submenus.php
new file mode 100644
index 0000000..cb26886
--- /dev/null
+++ b/tools/av-add-submenus.php
@@ -0,0 +1,146 @@
+<?php
+/**
+ * Plugin Name: Asterion — Add submenus to Header — Main + style nav-menu dropdown
+ * /?av_add_submenus=1
+ *   1. For each of Solutions, Industries, Technology (top-level items in
+ *      Header — Main, term_id=9), adds child menu items pointing to the
+ *      respective detail pages.
+ *   2. Updates the Bricks nav-menu element settings (hdrnav in template 25)
+ *      with dropdown styling : navy background, gold hover, padding.
+ *
+ * Idempotent : skips children that already exist (matched by URL).
+ */
+defined('ABSPATH') || exit;
+
+add_action('template_redirect', function () {
+    if (! in_array($_SERVER['SERVER_NAME'] ?? '', ['localhost', '127.0.0.1'], true)) return;
+    if (empty($_GET['av_add_submenus'])) return;
+
+    header('Content-Type: text/plain; charset=utf-8');
+
+    /* -----------------------------------------------------------------
+       1. Map slug → list of children for each top-level URL
+       ----------------------------------------------------------------- */
+    $sub_menus = [
+        '/solutions/' => [
+            ['title' => 'MY PROSERVE',      'url' => '/solutions/my-proserve/'],
+            ['title' => 'PROSERVE FLEX',    'url' => '/solutions/proserve-flex/'],
+            ['title' => 'PROSERVE ACADEMY', 'url' => '/solutions/proserve-academy/'],
+            ['title' => 'PROSERVE+',        'url' => '/solutions/customization/'],
+        ],
+        '/industries/' => [
+            ['title' => 'Police',         'url' => '/industries/police/'],
+            ['title' => 'Special Forces', 'url' => '/industries/special-forces/'],
+            ['title' => 'Military',       'url' => '/industries/military/'],
+            ['title' => 'Firefighters',   'url' => '/industries/firefighters/'],
+        ],
+        '/technology/' => [
+            ['title' => 'VR Hardware',         'url' => '/technology/vr-hardware/'],
+            ['title' => 'Software & AI',       'url' => '/technology/software-ai/'],
+            ['title' => 'Weapons & Tracking',  'url' => '/technology/weapons-tracking/'],
+            ['title' => 'Scenarios',           'url' => '/technology/scenarios/'],
+            ['title' => 'Instructor Cockpit',  'url' => '/technology/instructor-cockpit/'],
+            ['title' => 'After-Action Review', 'url' => '/technology/after-action-review/'],
+        ],
+    ];
+
+    $term_id = 9;  // Header — Main
+    $existing = wp_get_nav_menu_items($term_id) ?: [];
+    $by_url = [];
+    foreach ($existing as $item) {
+        $by_url[$item->url] = $item;
+    }
+
+    $total_added = 0;
+    foreach ($sub_menus as $parent_url => $children) {
+        if (! isset($by_url[$parent_url])) {
+            echo "  Parent $parent_url not found in menu — skipping\n";
+            continue;
+        }
+        $parent_id = $by_url[$parent_url]->ID;
+        echo "── Parent '{$by_url[$parent_url]->title}' (#$parent_id, url=$parent_url) ──\n";
+
+        foreach ($children as $child) {
+            if (isset($by_url[$child['url']])) {
+                echo "  '{$child['title']}' ({$child['url']}) already exists (#{$by_url[$child['url']]->ID}) — skip\n";
+                continue;
+            }
+            $new_id = wp_update_nav_menu_item($term_id, 0, [
+                'menu-item-title'     => $child['title'],
+                'menu-item-url'       => $child['url'],
+                'menu-item-type'      => 'custom',
+                'menu-item-status'    => 'publish',
+                'menu-item-parent-id' => $parent_id,
+            ]);
+            if (is_wp_error($new_id) || ! $new_id) {
+                echo "  '{$child['title']}' : FAILED\n";
+            } else {
+                echo "  '{$child['title']}' → #$new_id (parent=$parent_id)\n";
+                $total_added++;
+            }
+        }
+        echo "\n";
+    }
+
+    echo "Added $total_added new menu item(s).\n\n";
+
+    /* -----------------------------------------------------------------
+       2. Patch nav-menu element 'hdrnav' settings : dropdown styling
+       ----------------------------------------------------------------- */
+    global $wpdb;
+    foreach (['_bricks_page_content_2', '_bricks_page_header_2'] as $key) {
+        $val = $wpdb->get_var($wpdb->prepare(
+            "SELECT meta_value FROM {$wpdb->postmeta} WHERE post_id=%d AND meta_key=%s LIMIT 1",
+            25, $key
+        ));
+        if (! is_string($val) || $val === '') continue;
+        $is_json = ($val[0] === '[');
+        $elements = $is_json ? json_decode($val, true) : @unserialize($val);
+        if (! is_array($elements)) continue;
+
+        $modified = false;
+        foreach ($elements as $i => $el) {
+            if (($el['id'] ?? '') !== 'hdrnav') continue;
+
+            // Dropdown background + padding + typography
+            $elements[$i]['settings']['subMenuBackgroundColor']    = ['hex' => '#0B1F3A', 'raw' => 'var(--color-brand-navy)'];
+            $elements[$i]['settings']['subMenuBorder']             = [
+                'width' => ['top' => '1px', 'right' => '1px', 'bottom' => '1px', 'left' => '1px'],
+                'color' => ['raw' => 'rgba(201, 164, 90, 0.2)'],
+                'style' => 'solid',
+            ];
+            $elements[$i]['settings']['subMenuPadding']            = [
+                'top' => '0.5rem', 'right' => '0', 'bottom' => '0.5rem', 'left' => '0',
+            ];
+            $elements[$i]['settings']['subMenuItemPadding']        = [
+                'top' => '0.6rem', 'right' => '1.25rem', 'bottom' => '0.6rem', 'left' => '1.25rem',
+            ];
+            $elements[$i]['settings']['subMenuTypography']         = [
+                'color'           => ['raw' => 'var(--color-text-on-dark)'],
+                'font-size'       => '0.875rem',
+                'font-weight'     => '500',
+                'text-decoration' => 'none',
+                'white-space'     => 'nowrap',
+            ];
+            $elements[$i]['settings']['subMenuItemHoverTypography'] = [
+                'color' => ['raw' => 'var(--color-brand-gold)'],
+            ];
+            $elements[$i]['settings']['subMenuMinWidth']           = '14rem';
+            // Show arrow indicator next to parents with submenu
+            $elements[$i]['settings']['subMenuIndicator']          = true;
+
+            $modified = true;
+            break;
+        }
+        if ($modified) {
+            $new = $is_json ? wp_json_encode($elements) : maybe_serialize($elements);
+            $wpdb->update($wpdb->postmeta, ['meta_value' => $new],
+                ['post_id' => 25, 'meta_key' => $key], ['%s'], ['%d', '%s']);
+            wp_cache_delete(25, 'post_meta');
+            echo "  $key : hdrnav settings updated (dropdown styling)\n";
+        }
+    }
+
+    echo "\nDONE. Reload the site → hover Solutions/Industries/Technology in header → submenu drops down.\n";
+    exit;
+});