The Tailwind CSS Collision Problem Tailwind CSS is the undeniable standard for styling modern React applications. However, when building an enterprise-grade Design System or UI library for a B2B SaaS at Smart Tech Devs, developers frequently run into a massive architectural flaw: Class Collisions . Imagine you build a reusable <Button> component with a default padding of p-4 and a background of bg-blue-500 . Later, a developer tries to use that button but needs it to be red and have smaller padding for a specific danger modal: <Button className="bg-red-500 p-2">Delete</Button> . Because of how CSS specificity works, appending these classes often results in an HTML element that looks like this: class="bg-blue-500 p-4 bg-red-500 p-2" . The browser doesn't know which one to pick based on the order in the HTML; it picks based on the order the classes were defined in the underlying CSS file. The result is unpredictable styling, broken layouts, and frustrated developers writing !important hacks.β¦