Why CSS Specificity Alone Cannot Keep Large Codebases Clean

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A recurring problem in large CSS codebases is the gradual accumulation of overrides and !important declarations, even among disciplined engineering teams. The root cause is not poor coding habits but a structural limitation in how CSS specificity works — it resolves conflicts by counting selectors, not by encoding the author's intent. Specificity determines which rule wins numerically, but has no mechanism to distinguish a foundational base style from a one-off utility override. As codebases grow and more contributors join, selector weight and intended rule priority quietly diverge, causing pages to render incorrectly with no built-in warning. The article argues this is fundamentally a tooling gap in the web platform, not a people or discipline problem.

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