Component-based design is an increasingly popular process for developing web interfaces. It was once common for organizations to rely on libraries such as Bootstrap or Material UI. But with the advent of improved tooling, many teams today are building their own themes, component libraries, and design systems. This influx of design and development collaboration is generating many new, exciting systems. That said, rolling your own systems comes with its own challenges and pitfalls. A recent library, styled-system, is an effective tool for navigating some of these issues.