ahuseyn

Hello @brauliofarnese

Thank you for your helpful proposal. Adding submenu support is in my to-do list. This feature will be available in next update.
But if you want to add this functionality to your site right now you can follow these steps:

Create a child theme
Add this code to your child theme’s function.php file

function winterblues_menu_settings() {
  wp_nav_menu( array(
    'theme_location'  => 'nl-header',
    'depth' => 0,
  ));
}

Then create your own style for submenu elements and add them to your child theme’s CSS file.

Thank you!

Hello @ntdung2014

All Sass files of theme are located in winter-blues\assets\scss\ folder.

Thank you!