SIZING ELEMENTS - Percentages: Padding & Margin - CSS - Codecademy

Understanding CSS Box-sizing: border-box;, by Nico

CSS Cheat Sheet v2

javascript - How to get the dimensions of a DOM element, minus border and padding? - Stack Overflow

CSS Box Sizing - javatpoint

CSS Visual Formatting: Margin, Padding, Borders - The Helpful Tipper

CodeActually: CSS

CodeActually: CSS

Practical Use of CSS3: Transforms and Transitions

CSS, Box Model

Why set margin and padding to zero when starting CSS? Whenever I see someone start doing CSS, the first thing I almost always see them do is set everything with an asterisk