I get a lot of people asking me to recommend to them tutorials on various parts of CSS, or asking how to learn CSS. I also see a lot of people who are confused about bits of CSS, in part because of outdated ideas about the language. Given that CSS has changed quite substantially in the last few years, this is a really good time to refresh your knowledge. Even if CSS is a small part of what you do (because you work elsewhere in the stack), CSS is how things end up looking as you want them on screen, so it is worth being reasonably up to date.
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