One install replaces a store's whole navigation layer. The desktop mega menu is built straight from your category tree with multi-column panels, category thumbnails and an optional promo tile per panel (image + link + caption, edited as rows in admin). On phones it becomes an off-canvas drawer with accordion subcategories, swipe-to-close and proper body scroll lock. A setting-toggled sticky header hides on scroll down and reveals on scroll up, and an optional breadcrumb enhancer injects schema.org BreadcrumbList JSON-LD on category and product pages. Every feature is an independent toggle, the CSS is fully namespaced .nk-nav-*, and the JavaScript is dependency-free vanilla. Progressive enhancement means it coexists with any theme: drop a [data-nk-nav-mount] element where you want the menu, or let the pack inject itself after your existing

. Note: this pack bundles its own configurable mega-menu variant and is aimed at stores that are not running the standalone NovaKur Mega Menu module — it uses a separate settings namespace so the two never clash.