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I agree with you that CSS support is a bit lacking. I think they did this on purpose though, because many people prefer CSS preprocessors like SCSS/Sass or Less. However, with Create React App, you get nice CSS support via webpack and PostCSS. I recommend you check out styled-components; getting used to the back tick syntax takes some time, but after you do get used to it, working with them is really nice. Also, Babel syntax highlighting (in Atom at least) properly highlights the CSS used in styled-component.