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function ces_enqueue_styles_and_font() {
  wp_enqueue_style( 'integro-custom', get_stylesheet_directory_uri() . '/custom-css/main.css');
  wp_enqueue_style( 'custom-font', get_stylesheet_directory_uri() . '/custom-font/stylesheet.css');
}

add_action( 'wp_enqueue_scripts', 'ces_enqueue_styles_and_font', 1000 );