Styling a Google Map with CSS since no HTML is present

On this page, Instituto Einstein, I have a Google Map at the end of the page (on the footer).

The zone that says "Directions", below the map, has white text on an almost white background.

I tried to see the HTML code to style the map and change background color or hide that section, but I only see JavaScript for the map.

My question is, how can I hide that box or change its background? What are the selector that I can use?