HTML and CSS Introduction🌱 Beginner

HTML (HyperText Markup Language) and CSS (Cascading Style Sheets) are the two fundamental building blocks of the entire visual web. They dictate exactly what content appears on a page, and exactly how beautiful it looks.

What are HTML and CSS?

If you think of a web page as a human body, HTML is the skeleton. It defines the rigid structure: "This is a heading, this is a paragraph, this is an image." CSS is the skin and clothing. It defines the aesthetics: "Make that heading bold blue, make that image circular, and put a drop-shadow on the paragraph."

Why Do We Separate Them?

In the 1990s, developers used to write styling directly inside the HTML structure. This was a nightmare to maintain. By separating HTML (structure) into one file and CSS (design) into another, you can completely redesign a massive website just by swapping out a single CSS file without ever touching the core data.

How Do They Work Together?

You write HTML tags to create elements, and you give them a class name. Then, in your CSS file, you target that exact class name to apply styling.

<!-- The Structure -->
<h1 class="title">Welcome to the Web!</h1>

/* The Styling */
.title {
  color: #3b82f6;
  font-size: 3rem;
  text-align: center;
}