Responsive html

Hey, guys.

I need a little help with my codes… hope you can help me.

I created my header cta, with custom html. But the html is is not responsive and it looks terrible on mobile.

Does someone know a way to quickly adjust the code into a responsive one?

These are the links to the CTA’s code (A/B version)

https://www.nosnagringa.com.br/cta/cta-intercambio-do-zero/?wp-cta-variation-id=0

https://www.nosnagringa.com.br/cta/cta-intercambio-do-zero/?wp-cta-variation-id=1

Thank you in advance!