The Box — Chapter 1 — Magic of CSS — Adam Schwartz
CSS For Backend Developers
Box-sizing and CSS Box-Model Example
Grid Tracks - MDN Web Docs Glossary: Definitions of Web-related terms | MDN
The box model - Learn web development | MDN
4 Ways To Get the Width and Height of an Element with Vanilla JavaScript
GitHub - wbamberg/devtools-mdn-tooltips
MDN Web Docs Twitterren: "The CSS filter property lets you apply effects to an element before it is displayed. Using the Firefox DevTools filter editor, you can tweak effect settings and even