&lt;!DOCTYPE html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
    &lt;meta charset="UTF-8"&gt;
    &lt;meta name="viewport" content="width=device-width, initial-scale=1.0"&gt;
    &lt;title&gt;Hello World&lt;/title&gt;
    &lt;style&gt;
        body {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
            background-color: #f0f2f5;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }
        h1 {
            font-size: 4rem;
            color: #333;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
        }
    &lt;/style&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;h1&gt;Hello, World!&lt;/h1&gt;
&lt;/body&gt;
&lt;/html&gt;