A design system is a collection of reusable components, guided by clear standards, that can be assembled to build any number of applications consistently. It typically includes a component library, design tokens (like color, spacing, and typography), and documentation on usage patterns and principles.
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Rather than reinventing buttons, forms, or navigation for every project, teams pull from a shared, well-tested source of truth. This keeps the product experience coherent while speeding up design and development work.

Why does a design system matter?

A design system helps designers and developers work faster because they don't need to design or code the same UI patterns from scratch every time. It also makes products feel more consistent to users, since elements like buttons, colors, and interactions behave the same way everywhere.

Companies like Google (Material Design) and Atlassian (Atlassian Design System) maintain large, well-known design systems that scale across many products and teams.

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