remix-syntax/app/routes/demos/about.tsx

import { Outlet } from "remix";
import type { MetaFunction, LinksFunction } from "remix";

import stylesUrl from "~/styles/demos/about.css";

export let meta: MetaFunction = () => {
  return {
    title: "About Remix"
  };
};

export let links: LinksFunction = () => {
  return [{ rel: "stylesheet", href: stylesUrl }];
};

export default function Index() {
  return (
    <div className="about">
      <div className="about__intro">
        <h2>About Us</h2>
        <p>
          Ok, so this page isn't really <em>about us</em>, but we did want to
          show you a few more things Remix can do.
        </p>
        <p>
          Did you notice that things look a little different on this page? The
          CSS that we import in the route file and include in its{" "}
          <code>links</code> export is only included on this route and its
          children.
        </p>
        <p>
          Wait a sec...<em>its children</em>? To understand what we mean by
          this,{" "}
          <a href="https://remix.run/tutorial/4-nested-routes-params">
            read all about nested routes in the docs
          </a>
          .
        </p>
        <hr />
        <Outlet />
      </div>
    </div>
  );
}