Zakra 3.0 Footer styles in mobile view

Hi,
I have just recently updated to Zakra 3.0 after I have made the necessary adjustments of the child theme on a staging site. Everything went fine except for the mobile footer styling.

Here my CSS:

.zak-footer,
.zak-footer-bar {
background-color: #fff;
color: #3f3f46;
font-size: 1em;
}
.zak-footer-bar {
border-top: 1px solid #e4e4e7;
padding-top: 1em
}

In small viewport at least the text color and border-top color are not overridden by the child theme CSS.

Thanks in advance for your help,
Gabriele

The page I need help with: [log in to see the link]