>Are there any other good references that give a good underlying understanding of HTML/CSS without just giving examples of the various elements? Yeah. The W3C

>Are there any other good references that give a good underlying understanding of HTML/CSS without just giving examples of the various elements? Yeah. The W3C spec. A few years ago (before css flexbox and grid were really a thing), I was in your shoes. Anytime I needed to do something non trivial, I'd have to find some snippet from some tutorial site that would kind of fit with what I was looking for. At some point I got tired of that and just read the W3C specification. That's when I finally got the CSS layout manager. The specification was very accessible and explained exactly the layout rules. For example, here's the spec on the CSS box model: https://www.w3.org/TR/css-box-3/ https://www.w3.org/TR/css-box-3/ Now that flexbox and grid are universally supported in modern browsers, css is actually quite easy.