Sure! Here’s a complete HTML document structure starting from the `<!DOCTYPE html>` declaration down to the opening `<html>` tag:
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Your Document Title</title>
<link rel="stylesheet" href="styles.css"> <!-- Optional CSS -->
</head>
<body>
<!-- Your content goes here -->


