function uxde_specific_theme_style()  {

    wp_register_style( 'extras-style', get_template_directory_uri() . '/extras.css', array(), '1', 'all' );
    wp_register_style( 'fontawesome-style', get_template_directory_uri() . '/css/font-awesome.css', array(), '2.0', 'all' );
    wp_register_style( 'responsive-style', get_template_directory_uri() . '/media-queries.css', array(), '1', 'all' );

    wp_enqueue_style( 'extras-style' );
    wp_enqueue_style( 'fontawesome-style' );
    wp_enqueue_style( 'responsive-style' );

}

add_action( 'wp_enqueue_scripts', 'uxde_specific_theme_style' );