To understand CSS, we first need to look at how a web browser reads a page. A browser parses your HTML and builds the Document Object Model (DOM), a structural representation of the document. CSS then dictates how the nodes in that DOM tree should be painted onto the screen. The name says it all:
*, *::before, *::after box-sizing: border-box;
You don’t need to memorize every property. You need to know:
CSS is used to style HTML elements. HTML (Hypertext Markup Language) provides the structure of a web page, while CSS controls the layout, appearance, and behavior. CSS Demystified Start writing CSS with confidence
Hardcoding layouts with absolute pixel ( px ) values results in rigid websites that break on mobile screens. True confidence in CSS comes from leveraging relative units that scale naturally. Relative Typography ( rem and em )
With Flexbox, you control the children. With Grid, you control the container's skeleton.
p::first-line font-variant: small-caps; h2::before content: "✨ "; To understand CSS, we first need to look
Browsers have default margins and paddings that vary. A reset (or normalizer) gives you a consistent baseline:
/* Total width = 200px – padding & border shrink content area */
If two rules have the exact same weight, the in the stylesheet wins. CSS reads from top to bottom. The name says it all: *, *::before, *::after
You can’t master CSS without internalizing the box model. Every single element on a web page is a rectangular box. That box has four layers:
You cannot be confident in CSS until you dream in rectangles. Every single HTML element is a rectangular box. The confusion comes from how big that rectangle is.
Start Writing CSS with Confidence (Module 1-3) - Kevin Powell
Flexbox is designed for laying out items in a —either a single row or a single column. It excels at distributing space dynamically inside UI components like navbars, card components, and toolbars. The Container: Set display: flex; on the parent.
The specific setting for that property (e.g., blue , 16px , red ).