Center align the image horizontally in the footer

Hi,

I use “Soap Shop” starter template.

I’d like to horizontally line up the payment method image in the bottom row of the footer.

See the screenshot: https://app.screencast.com/gHZkdDhcJHuD1

I’ve applied the code :

text-align: center;

to all the CSS classes available in the browser inspection, but none of them work.

In the customizer, I don’t see a place to do it. How can I do it correctly?

I’d like to change only this part without touching the other footer widgets.

Thank you,