Visual Styles with CSS

Unlike HTML, CSS is a language that allows us to apply visual styles to our document.

HTML is for marking up content; CSS is for styling.

CSS stands for cascading style sheets. CSS code is a list of style rules. Rules can be provided within an HTML <style> element, or they can live in a dedicated .css file.

For this course, all of our CSS rules will live in their own file, apart from the HTML content that they will be applied to. We can apply a CSS file to any given HTML file by including an HTML line like this:

<link rel="stylesheet" href="styles.css">

where styles.css can actually be any filename you want.

The remainder of this section will demonstrate how to write CSS rules. We will assume that you will put them in a file named styles.css in the same directory as your HTML file.

Copy and paste this code into you HTML file and open it in your browser so that you can code along.

<!DOCTYPE html>
    <meta charset="utf-8">
    <title>My Page</title>
    <link rel="stylesheet" href="styles.css">

    <p>This is my amazing website.  Look around and
       find <span class="highlighter">amazing things!</span> This is the main paragraph
       of this page.  Isn't it amazing?

     <p>My favorite things are:</p>
       <li class="highlighter">Cookies</li>
       <li>Computer Progamming</li>
       <li>The audio archives of the Supreme Court</li>