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Three CSS Rules That Close the Gap Between Design Mockups and Production Code

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A software engineering guide highlights three commonly overlooked practices that help developers translate design files into cleaner, more maintainable code. The first rule recommends standardizing typography using rem units and CSS clamp() functions to create fluid, proportional text without excessive media queries. The second advises mapping all component states—such as hover, focus, disabled, and loading—before writing any markup, ensuring UI components behave predictably across interactions. The third rule discourages using arbitrary margins on individual components, instead shifting layout control to parent containers via Flexbox or Grid gap properties. Together, these practices encourage treating UI design as a structured architectural system rather than a purely visual exercise.

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