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In the previous chapter, we discussed many of the foundational concepts on which the Web as we know it today is built. Although some of that material is not directly involved with the minutia of day-to-day web development, all of it contributes to your awareness and skill when you are writing code. Similarly, it's important to have a strong understanding of certain foundations of CSS before you can build much on them.

We will therefore spend this chapter thoroughly exploring critically important aspects of how CSS works, such as the influence of user and user agent style sheets, and some of ...

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