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coss ui

by coss

Open-source UI components built with Base UI and Tailwind for refined product interfaces.

coss ui component and design system showcase

Design notes

coss ui is a modern component system from the team behind Cal.com. Built on Base UI primitives, it combines accessible interaction foundations with a distinctive component treatment and a practical code-first workflow.

The library is a strong reference for teams looking to develop their own visual identity on top of accessible, composable primitives.

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