Sass is an incredibly powerful CSS pre-processor that heavily upgrades native CSS, natively allowing you to use complex variables, deeply nested styling rules, automated mixins, and significantly more. React supports incorporating Sass directly out of the box if you choose to install the sass NPM package locally.
First, locally install the Sass processor: npm install sass. Then, you can simply create a styling file with a .scss extension and globally import it into your React component.
/* styles.scss */ $primary-color: #3b82f6; body { background-color: $primary-color; }
import './styles.scss';