What is the difference between phoenix.css and app.css?

Exactly. To me it doesn’t make sense at all. All phx-something alert-something classes should be in phoenix.css and app.css should be almost empty or perhaps have some basic styling.

The current setup is bad design and utterly confusing.

I have decided to ditch the phoenix.css file altogether and use only app.css but then I came to this error: From my 5 css files only app.css is being compiled to the static folder