may also get .pen_navigation_hide per content (never the .pen_navigation_show).
'pen_navigation_' . ( $navigation_html ? 'show' : 'hide' ),
pen_class_animation( 'header', false, $content_id ),
);
$cart_html = '';
if ( PEN_THEME_HAS_WOOCOMMERCE ) {
$cart_html = pen_html_woocommerce_header_cart( 'header', $content_id );
$classes_header[] = 'pen_cart_' . sanitize_html_class( $cart_html ? 'show' : 'hide' );
}
$classes_header = implode( ' ', array_filter( $classes_header ) );
?>