How can you write CSS that is maintainable and scalable?

I would say that leveraging a component-based approach and using the right amount of variables are going to work best in the long run.

Naming convention helps to scale, reduce css rules collisions and debug & maintain code. On top of the mentioned conventions, I would like to add 3 alternatives: * CSS modules * Shadow DOM * Atomic CSS (would be my choice for the most of the projects).

Avoid using non descriptive classes. It's easier to understand the styles if it's labelled as something like full-width or top-banner compared to class a, b and c

Consistent naming conventions are pivotal for maintainable CSS. While various approaches like BEM, OOCSS, or SMACSS exist, the selection often hinges on the company's protocols. Personally, I lean towards BEM due to its clear structure. For instance, with BEM, a navigation bar could be structured as follows: css Copy code /* Block */ .nav-bar { /* Styles for the block */ } /* Element */ .nav-item { /* Styles for the element */ } /* Modifier */ .nav-item--active { /* Modified styles for the active state */ } BEM's hierarchical format enhances code clarity, simplifying comprehension and upkeep. However, the choice should align with the team consensus and project requisites, ensuring an effective coding standard.

When I notice code déjà vu, I'm all about avoiding the copy-paste madness. Instead, I create classes that bundle up those repeating styles. It's like giving my code a wardrobe of styles to choose from. And here's the cool part – I can mix and match these styles by slapping on multiple classes to a single element. It's like styling freedom! So, I keep it snappy, use variables for consistency, and keep my codebase feeling fresh and tidy.

Please don't use a preprocessor. Modern CSS is very powerful and the only problem I have is selectors collision(no encapsulation). Which are the most css tools aimed to solve.

Leverage CSS frameworks like Tailwind to simplify responsive design, especially beneficial for beginners struggling with manual media queries. Tailwind streamlines the optimization process for diverse screen sizes, making it an excellent tool for efficient design.

Leveraging component-based architecture and passing CSS as props enhances maintainability and adheres to the DRY principle. Reusable components accepting dynamic styles as props allow efficient style management, reducing redundancy. For example, a button component could receive style-related props like color or size, minimizing code duplication. This approach, prevalent in frameworks like React, Vue, or Angular, facilitates global style updates by modifying the component. I fell in love with this when I first learned of it from attending a local seminar on css.