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Introduction to CSS
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Introduction to CSS
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17 units · Easy
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Overview
1
What is CSS?
2
How to Add CSS to HTML
3
CSS Selectors
4
Colors & Backgrounds
5
Typography
6
The Box Model
7
Width, Height & Overflow
8
Display & Visibility
9
Positioning
10
Flexbox
11
CSS Grid
12
Pseudo-classes & Pseudo-elements
13
CSS Variables
14
CSS Specificity & the Cascade
15
Your First Styled Webpage
16
Transitions & Animations
17
Responsive Design & Media Queries
Unit 12 of 17
Pseudo-classes & Pseudo-elements
Updated Jun 2026
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