Selectors are one of the first things you have to get to grips with when you start using CSS – and when you’re taking those initial baby steps, you could be forgiven for thinking there’s not all that much to them. It’s all IDs and classes – or simply selecting elements by their type (such as div or form) – and you can get by reasonably comfortably with this basic toolkit for a while, but it can only take you so far.

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