[CSS] How to change text-align property for subcategory titles only?

[MaxStrax]

Hello,

The following code allows the title of categories to be alligned in the center of the page (horizontally):
/.../themes/niara/css/product_list.css

h1.product-listing {
  text-align: center;
}

But, how to apply this custom CSS for the subcategories (subsequent levels) ONLY? Not for categories (first level).

Example:

• HOUSE (default, not centered)
  • Furnitures (centered)
    • Chairs (centered)
    • Tables (centered)

Edited August 10, 2023 by MaxStrax