How to style a custom widget?

I’ve created a custom widget and now I want to style it.
I know it’s possible to add styles to the css of dashboard/app but is there an option to have a css file specifically for the widget? Meaning, I want the file system structure to look like:

• Project/
  • custom_widgets/
    • multiselect/
      • multiselect.py
      • multiselect.ts
      • styles.css
  • main.py

cc @mateusz what is the current best practice here?

Hi @mateusz , any idea regarding this?