WP Show Posts wrapping title on mobile

Hi,
I have generatepress theme and using WP Show Posts in the Sidebar. My problem is that on the mobile, the title of the posts sit underneath the image instead of to the right of the image like they do on desktop.

WOuld it be the font size? I have added the following css already to adjust the font size, but is there a way to make it responsive?

.wp-show-posts {
font-size: 16px;
}

Thanks,
Rachel