Using signup 7 with widescreen monitors

A community member is experiencing an issue with the Signup 7 form on their website, where the page becomes scrollable and the form goes to the bottom of the page on widescreen monitors (1920px and up). They have not changed anything apart from images and text, so they suspect it might be a bug. Other community members have requested a read-only link to the website to take a look, and the original poster has provided a link. The original poster has mentioned that they have got the issue sorted, but no explicit solution has been provided in the comments.