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                                        <!DOCTYPE>


                                        <html>


                                        <head>


                                        <body>


                                        <title>

The DOCTYPE declaration tells the browser which version of HTML you’re using. For modern HTML5, always use:

<!DOCTYPE html>

This should be the very first line of your HTML document, before the <html> tag.

Why it matters: Without it, browsers might render your page in “quirks mode” which can cause unexpected layout issues.