Center a shortcode in a GeneratePress Element

Here's my shortcode (which I have placed in the functions.php and works great).

This function simply shows the generic WordPress Search Form:

function shapeSpace_display_search_form() {
	return get_search_form(false);
}
add_shortcode('display_search_form', 'shapeSpace_display_search_form');

In a Hook Element, I'd like to center the search form - that's it.

I thought something simple like this would work:

<div class="center">
[display_search_form]
</div>

However, it just aligns to the left.

Any ideas?

Thanks