CSS
Definition.
CSS: Cascading Style Sheets, a style sheet language used for describing the presentation of a document written in HTML.
In More Detail
CSS controls presentation, but the part that causes trouble in real projects is the cascade: which rule wins when several apply. Specificity conflicts are the usual reason a style 'doesn't work' when the selector is in fact matching correctly.
Tailwind's approach avoids most of that by keeping styles as utility classes on the element itself, so what you read in the markup is what renders. The cost is noisier markup; the benefit is that deleting a component deletes its styles too, instead of leaving orphaned rules in a stylesheet nobody dares touch.
In Practice
This entire site, and every Next.js/React project I build, uses Tailwind CSS on top of standard CSS — utility classes instead of hand-written stylesheets, which keeps styling co-located with the markup instead of drifting out of sync in a separate file.
Related Terms
Browse the full software development glossary, or see the frequently asked questions.
If you are working out whether this applies to your own project, the case studies show where it turned up in real builds, services lists what I take on, and pricing gives the starting figures.
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