| pages
| - About
| - - index.js
| - - styles.css
| - Home
| - - index.js
| - - styles.css
| index.js
| index.css

<div className="my-component">
   <span className="my-class">Hello</span>
</div>

const styles= {
  myComponent: {
    fontSize: 200,
  },
};
const myComponent = () => (
  <span style={styles.myComponent}>Hello</span>
);