Wordpress add custom styles to menu nav (with carbon fields)

wp custom menu intems style

// Adding a custom color and weight to the links
add_filter('nav_menu_link_attributes', 'crb_nav_menu_link_attributes', 10, 4);
function crb_nav_menu_link_attributes($atts, $item, $args, $depth) {
    $crb_color = carbon_get_nav_menu_item_meta($item->ID, 'nav_color');
    $crb_weight = carbon_get_nav_menu_item_meta($item->ID, 'nev_weight');
    $crb_color =  ! empty( $crb_color ) ? ' color: ' . $crb_color . '; ' : '';
    $crb_weight = ! empty( $crb_weight ) ? ' font-weight: ' . $crb_weight . '; ' : '';
    $atts['style'] = $crb_color.$crb_weight;
  
 
    return $atts;
}