Some notes from restudy of HTML and CSS

Over the last three days, I have dedicated myself to revisiting my knowledge of HTML and CSS, which I originally learned six years ago. As a developer, I focused primarily on backend development, and I realized that I had forgotten some essential concepts and techniques within the frontend domain. Through this process of restudying, I have discovered numerous new or forgotten elements of HTML and CSS and noted down everything.

If anyone is interested, please check the Google drive link. And invite any feedback or suggestions for improvement.