Styling reCAPTCHA

Implementing reCAPTCHA in the form does not look great on a mobile platform, it stretches beoynd the viewport width. It shouldn’t because I’ve set my overall margin to 1.4em.

I’ve tried to target .wpcf7-form-control iframe and set the max-width, but nothing happens.

Anyone know how to fix this?

https://wordpress.org/plugins/contact-form-7/