How to make a Cover Image display consistently across all screens

Site URL: http://www.studiojci.com/gc1

Hello,

I made a Full-Bleed Cover Page using a Gallery block and resized the images to full width in order to cover the entire page (My webpage is Square-space 7.0). However, one thing I noticed is that white space will appear depending on the screen size. This means that while my laptop screen will display a full image, bigger monitors create a white bottom border that I need to get rid of. 

Is there any code/work around that will allow me keep the image sizes consistent across all screens so that all screens will show the same sizing and remove the white border? 

Thanks so much in advance, 

Website: http://www.studiojci.com/gc1 (Password: jci123) 

Laptop Display:

Monitor Display:

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