Hi Fernando,
So I added it through style.css in my Generate press child theme. All the other CSS is in that file.
But this CSS did not make the footer bar sticky. So when I follow your recommendation and add it through Appearance > Customize > Additional CSS, it makes the footer bar sticky.
Now it looks fine.
Just a side note, curious why this CSS or any CSS would not work in the child theme file but works in the additional CSS section?
Current CSS:
/* Sticky footer bar */
.footer {
position: fixed;
left: 0;
bottom: 0;
width: 100%;
}
Thanks.