How does Tailwind connect to SvelteKit?

[gushogg-blake]

After following the guide at https://tailwindcss.com/docs/guides/sveltekit, tailwind classes seem to work, but I'm puzzled as to how SvelteKit knows to invoke Tailwind here.

Here is my svelte.config.js:

import path from "path";
import adapter from "@sveltejs/adapter-static";

export default {
	kit: {
		adapter: adapter(),
		
		browser: {
			router: true,
		},
		
		trailingSlash: "always",
		
		vite: {
			resolve: {
				alias: {
					$src: path.resolve("./src"),
					$utils: path.resolve("./src/utils"),
					$actions: path.resolve("./src/actions"),
					$components: path.resolve("./src/components"),
					$css: path.resolve("./src/css"),
				},
			},
		},
	},
};

My understanding is that npm run dev starts SvelteKit, which uses this config file to do all preprocessing etc, so unless Tailwind is referenced here (either directly or via PostCSS) it won't run as part of the Svelte build. What am I missing? How does Tailwind actually get invoked here?

[gushogg-blake]

Update - it looks like SvelteKit looks for postcss.config.js by default.