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Output
<!DOCTYPE html> <html> <head> <style> #main-heading { color: darkblue; text-align: center; font-size: 36px; } </style> </head> <body> <h1 id="main-heading">CSS ID Selector Example</h1> <p>This paragraph is styled using the element selector.</p> <p>All paragraphs share the same style.</p> </body> </html>