What does utility-first CSS mean?
It means composing UIs from small, single-purpose utility classes like flex, p-4, and text-center, instead of writing named CSS classes and rules. Each utility does one thing, and you combine them in the markup.
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More FAQs in Utility-First CSS Explained: The Mental Model Behind Tailwind
The naming problem. In traditional CSS, you invent class names like card-inner-wrapper, which is hard and subjective. Utility-first removes this entirely: the utilities are fixed, and you compose them, so there is nothing to name.
Because utilities live in the markup, so styling is right where the element is. You do not switch between a CSS file and the markup to understand or change styling, which is faster and more direct.
By extraction. Pull repeated combinations into React components, so the long class string lives in one reusable place. This keeps markup DRY without overusing @apply.
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