Phoenix 1.6.0 LiveView + esbuild + Tailwind JIT + AlpineJS - A brief tutorial

Are there any tricks/methods for the additional css files you could use as an addition to tailwindcss. Like for example adding @import "./custom-base-styles.css"; to the assets/css/app.css file. Would this still work and where do I need to drop these additional files. When trying via the assets/css/ location doesn’t work.