In this chapter, you learned how to use inline styles inside React components. You can use them occasionally in places where it's easier to add some dynamic functionality this way. For the core styles of our app, we have chosen the CSS modules approach powered by Webpack and PostCSS. It allows writing modular CSS more easily than a naming convention-based approach (BEM, SMACSS, and so on). Keep in mind that the CSS module doesn't solve all the pitfalls when it comes to writing maintainable CSS code, you may want to stick to some other ideas from BEM, such as using class selectors in favor of element selectors, avoid nested selectors, and so on. You also learned about PostCSS, and how you can instantly benefit from using it. We covered some notable plugins for PostCSS that can make your job as a frontend engineer easier. You learned how to use Webpack loaders and how to configure everything in order to be able to write modular and maintainable CSS.