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HTML/CSSAdvanced#css#performance
HTML/CSSBeginner#css#cross-browser
What is a CSS reset or normalize.css and why use one?
Browsers apply different default styles (margins on <p>, list bullets, etc.). A CSS reset strips these defaults entirely to build up from zero; normalize.css instead makes defaults consistent across browsers while preserving useful ones. Both create a predictable starting point.
Example
/* Minimal reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
img, picture { max-width: 100%; display: block; }