Enable scrollable model on mobile

Hey forum! For the life of me I cannot figure out how to make my pop-up modal (when you click SIGN UP FOR A LIFE GROUP TODAY!). The modal looks great on desktop on tablet, but severely lacking in UI when it’s in mobile. I have added html code to stop the background from scrolling (body, .no-scroll) when the modal is active, but I am not able to scroll down to the submit button on the modal. Any help would be appreciated in figuring this out. Thank you!

Here is my site Read-Only: https://life-groups-real-life-church.webflow.io