What do I need to add to the functions.php file so that I can add custom styles to the files in the /CSS/ directory in my child theme?
Hey dnj14!
Your trying to embed CSS directly into some files? Instead of doing that just place all of your CSS in the child theme stylesheet. If you need to target a specific page then you can use the page ID like so.
.page-id-12 h3 { font-size: 20px !important; }
Regards,
Elliott