if ( ! function_exists( 'hu_styles' ) ) {
  function hu_styles() {
    $_main_style = hu_is_checked('responsive') ? 'main' : 'main-not-responsive';

    //registered only, will be loaded as a dependency of the wp style.css
    wp_register_style(
        'hueman-main-style',
        sprintf('%1$s/assets/front/css/%2$s%3$s.css',
            get_template_directory_uri(),
            $_main_style,
            hu_is_checked('minified-css') ? '.min' : ''
        ),
        array(),
        ( defined('WP_DEBUG') && true === WP_DEBUG ) ? time() : HUEMAN_VER,
        'all'
    );

    //This function loads the main theme stylesheet or the child theme one
    //1) Not mandatory if only the main theme is activated. But mandatory if a child theme is used (otherwise the child theme style won't be loaded)
    //2) must be loaded as a dependency of 'hueman-main', to make it easier to override the main stylesheet rules without having to increase the specificicty of each child theme css rules
    wp_enqueue_style(
        'theme-stylesheet',
        get_stylesheet_uri(),
        array('hueman-main-style'),
        ( defined('WP_DEBUG') && true === WP_DEBUG ) ? time() : HUEMAN_VER,
        'all'
    );

    //can be dequeued() if already loaded by a plugin.
    //=> wp_dequeue_style( 'hueman-font-awesome' )
    wp_enqueue_style(
        'hueman-font-awesome',
        sprintf('%1$s/assets/front/css/%2$s',
            get_template_directory_uri(),
            hu_is_checked('minified-css') ? 'font-awesome.min.css' : 'dev-font-awesome.css'
        ),
        array( 'theme-stylesheet' ),
        ( defined('WP_DEBUG') && true === WP_DEBUG ) ? time() : HUEMAN_VER,
        'all'
    );
  }
}
add_action( 'wp_enqueue_scripts', 'hu_styles' );