Full screen content display on password page for desktop/mobile

I am wanting my image banner to be full screen for desktop and mobile–my store is currently using the “Spotlight” theme. Currently for my desktop theres a white “password footer” at the bottom that cannot be remove when using shopify customization theme settings. When viewing on mobile the “email signup banner” and “password footer” areusing a lot of white space and I would like my visual/gif to occupy the entire screen when viewing. I’ve provided a screen shot of both desktop and mobile views. I was told I would need a specific CSS code to create a full screen experience on both mobile and my desktop.

providing references below (please copy and paste mobile reference in URL to view)

desktop reference:

https://www.aimeleondore.com/

mobile reference:

file:///Users/agray/Downloads/RPReplay_Final1693920474.MP4

Thank you in advance for taking the time to help!!

@AROUNDdeWAY Hello Can You please Provide your store URL i will check and provide a proper solution