Separate Image and text of Poster Block on Mobile Only

Site URL: https://www.dawnduskfilm.com/campaign

Hello, I am wondering if anyone can help with the CSS to fix a problem with my site on mobile. The URL is here: Dawnduskfilm.com/campaign

I have a series of Image Blocks set as Posters, they eventually will all be clickable links., the first one is clickable right now. The text over the images looks nice on desktop view but the text extends over the images on mobile view, if the text resizes any smaller it will be too small on mobile. Is there a way to put the text above or below the image or remove the images entirely and keep the text (but still have them be clickable links)? Also, the text would need to be black, instead of white since it will be over a white background.

I have scoured the forums and tried a lot of CSS to get this to work but haven't figured it out. Thanks in advance.

Desktop view 

Mobile View

Add to Design > Custom CSS

@media screen and (max-width:640px) {
div#page-632f621d4a7501528350cdd1 .content-fill {
    padding-bottom: 100% !important;
}
}

Wow, incredible. Thank you so much @tuanphan