This feels like a thoughtful exploration of health tracking—the soft palette keeps the data approachable, while the repeated card language makes the flow easy to scan. The progress view is a nice touch for making longer-term use feel tangible.
Brand guidelines fail when someone tries to use them. The PDF is complete. But when a developer needs something the system didn't anticipate, there's no logic to extend from. A style guide documents what exists. A system tells you what to do next.