The Box Model: Content, Padding, Border and Margin

Every element on a page is a box with four layers, content, padding, border and margin, and knowing them is how you control every bit of space on a page.

Updated

Cheat sheet: The Box Model: Content, Padding, Border and Margin
Category
CSS
Level
Novice
Tags
Block, Border, Box model, CSS, Inline, Margin, Padding, web-development