Background Overlay Promo Popup Mobile

Hello. I'd like to apply the same background overlay to mobile that appears on desktop when the promotional popup is active.

On desktop I see the following CSS which is missing from mobile. How can I add this to the mobile CSS?

.sqs-slide-wrapper[data-slide-type="popup-overlay"] .sqs-slide-container[data-slide-type="popup-overlay"] .sqs-slide {
    position: fixed;
}

.sqs-slide-wrapper[data-slide-type="popup-overlay"] .sqs-slide {
    background: #0000008c;
}

Thanks in advance!

@AmandaLaF Try add !important to after, eg: position: fixed !important;

if it doesn't work, can you share site url?

@tuanphan adding !important; isn't working. Any ideas? 

Here's a link to my site:

https://www.jenevoymakeupstudio.com/

1 minute ago, deandra.olivieri said:

@tuanphan adding !important; isn't working. Any ideas? 

Here's a link to my site:

https://www.jenevoymakeupstudio.com/

Seems fine here. Have you tried clearing your browser cache yet? or try other browsers

Trying to get a background overlay over the site the way it appears on desktop. Is this possible? 

I'm also trying to add an image the way it appears on desktop. Do you know if that's possible @tuanphan?