Center the product page

-- HikaShop version -- : 2.3.5
-- Joomla version -- : 2.3.1

How do I center the product page? I found something that indicated I needed to add this to the css but it didn't change my layout?
#hikashop_product_top_part {
text-align: center;
}

Hello,
To do that you'll have to use some CSS code, checking that documentation will probably help you : www.hikashop.com/support/documentation/1...the-display.html#css