HTML and CSS Relationship

HTML is the structure of a webiste. CSS is the styling or appearance. You use HTML to lay out your content. Then CSS to posittion, set the colors, typography, etc.

index.html

The reason why the homepage of every website is typically the file "index.html", is because every browser will look for that file first. You index.html file mus be all lowercase, with no spaces, numbers, etc.

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