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Introduction to CSS

CSS stands for Cascading Style Sheets — basically the secret sauce that makes web pages look good instead of just being a wall of text.

If HTML is the skeleton of a website, then CSS is the skin, clothes, and overall vibe — colors, layouts, fonts, spacing, animations, you name it.

Here’s the breakdown:

Cascading → means styles flow down from parent to child elements, and if multiple rules conflict, there’s a specific order (or “cascade”) that decides which one wins.

Style → defines how the content looks (color, size, font, margins, etc.).

Sheets → these are external files (usually .css) that store all the style rules in one place.

A tiny example:

<!DOCTYPE html>
<html>
<head>
<style>
body {
background-color: #f0f0f0;
font-family: Arial;
}
h1 {
color: royalblue;
text-align: center;
}
</style>
</head>
<body>
<h1>Hello, World!</h1>
</body>
</html>


Output:

Hello, World!




💡 What CSS Really Does:

CSS is a style language used to describe how HTML elements should appear on a screen, paper, or any other media.
It controls things like:

Colors → text, backgrounds, borders

Fonts → type, size, weight, spacing

Layout → margins, padding, positioning, grids, flexbox

Animations → fades, slides, spins, and other visual effects

It’s basically how web designers make websites feel alive.