add_action( 'widgets_init', function () {
    register_sidebar( array(
        'name'          => __( 'Product Sidebar', 'vara-saas' ),
        'id'            => 'product-sidebar',
        'description'   => __( 'Shown beside product pages.', 'vara-saas' ),
        'before_widget' => '<section id="%1$s" class="widget %2$s">',
        'after_widget'  => '</section>',
        'before_title'  => '<h2 class="widget-title">',
        'after_title'   => '</h2>',
    ) );
} );