```html <title>Styled Headings</title> /* Include the CSS code here */ h1 { font-family: 'Arial', sans-serif; font-size: 36px; color: #333333; text-align: center; margin-bottom: 20px; } h2 { font-family: 'Georgia', serif; font-size: 28px; color: #555555; text-align: left; margin-bottom: 15px; } h3 { font-family: 'Verdana', sans-serif; font-size: 22px; color: #777777; text-align: left; margin-bottom: 10px; } <h1>Main Heading</h1> <h2>Subheading Level 2</h2> <h3>Subheading Level 3</h3> ```