Web Vitals: Google's core metrics for real-world speed
2 Jun 2020 — An introduction to Core Web Vitals — LCP, INP, CLS — how Google uses them, and where to measure them on your site.
CSS Units (em, rem, %, px, vh, vw): Which One to Use Where?
3 Dec 2018 — A practical guide to CSS units for web design — em, rem, %, px, vh, and vw — and which one fits each situation.
BEM: A naming convention for CSS classes
5 Jun 2017 — Block, Element, Modifier — a simple, widely adopted way to name CSS classes so component styles stay readable and easy to maintain.
The CSS display property: outer and inner display explained
A practical tour of the CSS display property, including the modern two-keyword syntax and values like flow-root, contents, and list-item.
CSS selectors: a complete guide to selectors and combinators
A practical reference to CSS selectors and combinators — elements, classes, IDs, attribute selectors, and how to combine them.