Hey John!
Have you looked at the following tutorial:
https://docs.skuid.com/v10.0.4/en/skuid/javascript/create-custom-comp.html#styling-your-components-w…
You should be able to add css into your runtime.css and builder.css files and reference those with your custom component.
Otherwise, you can always add inline CSS to your theme within Theme Builder, and that will be referenced on every page that uses that theme.
Good luck,
Thanks!
Christine
