private function build_summary_style_html( $order ) {
		$font_colour      = apply_filters( 'automator_woocommerce_order_summary_text_color', '#000', $order );
		$font_family      = apply_filters( 'automator_woocommerce_order_summary_font_family', "'Helvetica Neue', Helvetica, Roboto, Arial, sans-serif", $order );
		$table_styles     = apply_filters( 'automator_woocommerce_order_summary_table_style', '', $order );
		$border_colour    = apply_filters( 'automator_woocommerce_order_summary_border_color', '#eee', $order );
		$tr_border_colour = apply_filters( 'automator_woocommerce_order_summary_tr_border_color', '#e5e5e5', $order );
		$tr_text_colour   = apply_filters( 'automator_woocommerce_order_summary_tr_text_color', '#636363', $order );
		$td_border_colour = apply_filters( 'automator_woocommerce_order_summary_td_border_color', '#e5e5e5', $order );
		$td_text_colour   = apply_filters( 'automator_woocommerce_order_summary_td_text_color', '#636363', $order );

		$html   = array();
		$html[] = sprintf(
			'<table class="td" cellspacing="0" cellpadding="6" border="1" style="color:%s; border: 1px solid %s; vertical-align: middle; width: 100%%; font-family: %s;%s">',
			$font_colour,
			$border_colour,
			$font_family,
			$table_styles
		);
		$items  = $order->get_items();
		$html[] = '<thead>';
		$html[] = '<tr class="row">';
		$th     = sprintf(
			'<th class="td" scope="col" style="color: %s; border: 1px solid %s; vertical-align: middle; padding: 12px; text-align: left;">',
			$tr_text_colour,
			$tr_border_colour
		);
		$html[] = $th . '<strong>' . apply_filters( 'automator_woocommerce_order_summary_product_title', esc_attr__( 'Product', 'uncanny-automator' ) ) . '</strong></th>';
		$html[] = $th . '<strong>' . apply_filters( 'automator_woocommerce_order_summary_quantity_title', esc_attr__( 'Quantity', 'uncanny-automator' ) ) . '</strong></th>';
		$html[] = $th . '<strong>' . apply_filters( 'automator_woocommerce_order_summary_price_title', esc_attr__( 'Price', 'uncanny-automator' ) ) . '</strong></th>';
		$html[] = '</thead>';
		if ( $items ) {
			/** @var WC_Order_Item_Product $item */
			$td = sprintf(
				'<td class="td" style="color: %s; border: 1px solid %s; padding: 12px; text-align: left; vertical-align: middle; font-family: %s">',
				$td_text_colour,
				$td_border_colour,
				$font_family
			);
			foreach ( $items as $item ) {
				$product = $item->get_product();
				if ( true === apply_filters( 'automator_woocommerce_order_summary_show_product_in_invoice', true, $product, $item, $order ) ) {
					$html[] = '<tr class="order_item">';
					$title  = $product->get_title();
					if ( $item->get_variation_id() ) {
						$variation      = new \WC_Product_Variation( $item->get_variation_id() );
						$variation_name = implode( ' / ', $variation->get_variation_attributes() );
						$title          = apply_filters( 'automator_woocommerce_order_summary_line_item_title', "$title - $variation_name", $product, $item, $order );
					}
					if ( true === apply_filters( 'automator_woocommerce_order_summary_link_to_line_item', true, $product, $item, $order ) ) {
						$title = sprintf( '<a style="color: %s; vertical-align: middle; padding: 12px 0; text-align: left;" href="%s">%s</a>', $td_text_colour, $product->get_permalink(), $title );
					}
					$html[] = sprintf( '%s %s</td>', $td, $title );
					$html[] = $td . $item->get_quantity() . '</td>';
					$html[] = $td . wc_price( $item->get_total() ) . '</td>';
					$html[] = '</tr>';
				}
			}
		}

		$td       = sprintf(
			'<td colspan="2" class="td" style="color: %s; border: 1px solid %s; vertical-align: middle; padding: 12px; text-align: left; border-top-width: 4px;">',
			$td_text_colour,
			$td_border_colour
		);
		$td_right = sprintf(
			'<td class="td" style="color: %s; border: 1px solid %s; vertical-align: middle; padding: 12px; text-align: left; border-top-width: 4px;">',
			$td_text_colour,
			$td_border_colour
		);
		// Subtotal
		if ( true === apply_filters( 'automator_woocommerce_order_summary_show_subtotal', true, $order ) ) {
			$html[] = '<tr>';
			$html[] = $td;
			$html[] = apply_filters( 'automator_woocommerce_order_summary_subtotal_title', esc_attr__( 'Subtotal:', 'uncanny-automator' ) );
			$html[] = '</td>';
			$html[] = $td_right;
			$html[] = $order->get_subtotal_to_display();
			$html[] = '</td>';
			$html[] = '</tr>';
		}
		// Tax
		if ( true === apply_filters( 'automator_woocommerce_order_summary_show_taxes', true, $order ) ) {
			if ( ! empty( $order->get_taxes() ) ) {
				$html[] = '<tr>';
				$html[] = $td;
				$html[] = apply_filters( 'automator_woocommerce_order_summary_tax_title', esc_attr__( 'Tax:', 'uncanny-automator' ) );
				$html[] = '</td>';
				$html[] = $td_right;
				$html[] = wc_price( $order->get_total_tax() );
				$html[] = '</td>';
				$html[] = '</tr>';
			}
		}
		// Payment method
		if ( true === apply_filters( 'automator_woocommerce_order_summary_show_payment_method', true, $order ) ) {
			$html[] = '<tr>';
			$html[] = $td;
			$html[] = apply_filters( 'automator_woocommerce_order_summary_payment_method_title', esc_attr__( 'Payment method:', 'uncanny-automator' ) );
			$html[] = '</td>';
			$html[] = $td_right;
			$html[] = $order->get_payment_method_title();
			$html[] = '</td>';
			$html[] = '</tr>';
		}
		// Total
		if ( true === apply_filters( 'automator_woocommerce_order_summary_show_total', true, $order ) ) {
			$html[] = '<tr>';
			$html[] = $td;
			$html[] = apply_filters( 'automator_woocommerce_order_summary_total_title', esc_attr__( 'Total:', 'uncanny-automator' ) );
			$html[] = '</td>';
			$html[] = $td_right;
			$html[] = $order->get_formatted_order_total();
			$html[] = '</td>';
			$html[] = '</tr>';
		}
		$html[] = '</table>';
		$html   = apply_filters( 'automator_order_summary_html_raw', $html, $order );

		return implode( PHP_EOL, $html );
	}