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> **Possible Duplicate:**  
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> [Two css files defining same class](https://stackoverflow.com/questions/2417287/two-css-files-defining-same-class) 
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The answers to [this question](https://stackoverflow.com/questions/2417287/two-css-files-defining-same-class) and [this question](https://stackoverflow.com/questions/372655/using-two-css-files-in-the-same-html-file) state that when the same selector/property combination is specified in two different CSS files, the one in the file that is included last wins. My question is, is this behavior part of a standard (HTML or CSS), or is it simply the current behavior in the major browsers? I need to know if I can depend on this behavior across all browsers. If this is part of a standard, would you please reference the relevant section?