Can't style Contact Form 7 checkboxes

I’m trying to make my checkboxes display as a block and one underneath another sort of like a list. Instead they look all squished together like so:

zoestudios.ca/questionnaire

(scroll down to the Content/Special Features section to find the checkboxes)

I’ve looked through the contact form 7 plugin styles.css and the js_composer_front.css from the theme itself and whenever I go to refresh the page and use Inspect Element to check out if the codes been changed, it says none of my code has been added and no changes have been made.

How would I style the checkboxes to more of a list format? And where’s the correct stylesheet located to do so?