postcss‑scope is a lightweight PostCSS plugin that automatically prefixes all of your CSS rules with a custom selector (e.g., `.foo`), letting you conveniently namespace or “scope” styles for a specific component or section. It supports multiple scopes, per‑file overrides, and comment‑based directives to ignore individual rules or whole files, making it handy for front‑end developers who want simple, configurable CSS encapsulation—especially when working with tools like Tailwind.