CSS has evolved significantly from its early days when web development was plagued with unattractive and inaccessible sites, as developers had to manage separate CSS files and link them manually in HTML documents. The rise of JavaScript as a dominant web programming language and the emergence of modern frameworks like React have introduced new concepts and libraries for styling web applications. Among these, CSS Modules and CSS-in-JS are notable for their ability to scope styles and integrate them with React's component-based architecture, reducing the risk of name collisions and promoting reusability. Inline styling in React, while easy to understand and implement for beginners, poses limitations in scalability, performance, and support for advanced CSS features like media queries and pseudo-classes. Consequently, developers seeking to build scalable and performant applications are advised to move away from inline styling in favor of more robust solutions like CSS-in-JS.