The evolution of CSS has seen a shift from older practices of maintaining large and unorganized stylesheets towards modern methodologies that enhance maintainability and scalability. Developers often undervalue CSS, leading to problematic practices like using !important indiscriminately or relying on ultra-specific selectors. However, the front-end community's drive for improvement has introduced advanced CSS features like Grid Layout and Flexbox, and the emergence of preprocessors such as Sass, Stylus, and Less, which offer functionalities like variables, nesting, and mixins to streamline styling processes. Post-processors like PostCSS further transform CSS for optimized performance, while CSS-in-JS libraries, popularized in the React ecosystem, integrate styling directly into JavaScript, addressing issues like global namespace conflicts and dead code elimination. Despite their advantages, CSS-in-JS solutions are sometimes met with skepticism due to the unconventional merging of styling and scripting. Ultimately, the choice of using preprocessors, post-processors, or CSS-in-JS depends on the specific needs of a project, emphasizing the importance of moving beyond basic CSS for complex applications.