2.html

<!DOCTYPE html>
<html>
<head>
    <title>WEB1 - CSS</title>
    <meta charset="utf-8">
    <link rel="stylesheet" href="style.css" />
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
    <script src="colors.js"></script>
</head>
<body>
    <h1><a href="index.html">WEB</a></h1>
    <input type="button" value="night" onclick="
        nightDayHandler(this);    
    ">
    <div id="grid">
        <ol>
            <li><a href="1.html" class="saw">HTML</a></li>
            <li><a href="2.html" class="saw" id="active">CSS</a></li>
            <li><a href="3.html">JavaScript</a></li>
        </ol>
    
        <div id="article">
            <h2>CSS란 무엇인가?</h2>
            <p>Cascading Style Sheets (CSS) is a style sheet language used for describing the presentation of a document written in a markup language such as HTML or 
XML (including XML dialects such as SVG, MathML or XHTML).[1] CSS is a cornerstone technology of the World Wide Web, alongside HTML and JavaScript.[2]
            </p>
        </div>
    </div>
</body>
</html>