How do you keep your styles from turning into a mess six months in?
Your choice of styling approach shapes how fast the team moves and how much CSS you end up fighting.
Styles that scale
Every project starts clean. What matters is how it reads after ten components and three people have touched it. Tailwind keeps styles next to the markup. CSS Modules give you scoped plain CSS with nothing to install. vanilla-extract lets you write CSS in TypeScript and catches typos at compile time.
If you are new to CSS, start with CSS Modules. Tailwind hides a lot of what CSS actually does: the cascade, specificity, the box model, pseudo-classes. CSS Modules keeps you writing real CSS while scoping it per component, so the fundamentals stay visible.
Will a new teammate understand my styles on day one, or will they need to learn a tool first? Does anyone on my team already know Tailwind CSS, CSS Modules, or vanilla-extract from a previous project?
What it costs to leave
The tool you pick is the tool you are stuck with later. Weigh the runtime cost (CSS computed in the browser as the page runs, which Tailwind and CSS Modules avoid by doing the work at build time) against how hard it would be to walk away.
Compare the runtime cost and bundle size of Tailwind CSS, CSS Modules, and vanilla-extract for a Next.js App Router project, and tell me how much code I would rewrite if I had to remove my chosen tool tomorrow.
Pick the styling approach your team can read on day one, not the one that looks clever in an empty repo. If you are still learning CSS, CSS Modules is the right first choice: real CSS, real cascade, real specificity, just scoped.
Additional Resources
Explore these carefully curated resources to deepen your understanding and practice the concepts covered in this lesson.
CSS Modules (Next.js)
DocumentationOfficial Next.js guide to using CSS Modules in the App Router, including colocated stylesheets and server components.
https://nextjs.org/docs/app/getting-started/css
CSS Modules (MDN)
DocumentationMDN reference for scoped CSS patterns, the cascade, and specificity rules that CSS Modules builds on.
https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_nesting
Tailwind CSS
DocumentationUtility-first CSS you compose directly in your markup, no separate stylesheet to maintain.
https://tailwindcss.com