I hope you're well on this fine day.
I followed the instructions here to replace the new user activation page presented by Gravity Forms:
The page is supposed to load the default CSS styles for the site, but it does not. The overriding files are in this folder on this site:
I added CSS files to the same folder as activate.php in case it looked there for them. I tried a few shortcodes related to the header in the main theme files but they made no difference. I also contacted cloud-press.net about it last weekend and have yet to get a response.
I'm hoping this is not a difficult question for anyone familiar with Wordpress theme structure and custom templates.