CSS Introduction

• CSS stands for Cascading Style Sheets
• CSS describes how HTML elements are displayed on screen
• CSS saves a lot of work — it can control the layout of multiple web pages all at once
• External stylesheets are stored in .css files

Try It — CSS Demo

Click the CSS tab in the editor below to modify the styles and see live changes:

Why Use CSS?

CSS separates your content (HTML) from your presentation (how it looks). This means:

• You can change the look of an entire website by editing just one CSS file
• Pages load faster (styles are cached by the browser)
• Your HTML code stays clean and readable

Tip: Open the CSS tab in the editor and try changing background-color: #1a1a2e to background-color: lightblue and click Run to see the difference!