Add underline for body links in Henson

Hello, I haven't had success with any of the CSS I've found to create underlines for body text only on the Henson template. Any ideas? Thank you!

@asjeffer Can you share your site url (or a page with links to check css)?

Yes! It is www.totumwomen.com. I've started underlining links manually for compliance reasons, but would like to find an automatic solution. Thank you.

@asjeffer Add to Home > Design > Custom CSS

div#mainContent a {
   text-decoration: underline;
}

but i like this code

div#mainContent a {
   border-bottom: 1px solid green;
}

Thank you @tuanphan! That worked well.

@asjeffer Accept Answer & Upvote if it worked. Thanks