Explanation of Changes:
1. CSS Styling:
- Added CSS rules to make the `mrzOutput` element selectable and show a pointer cursor, indicating that it can be clicked.
2. MRZ String Combination:
- The `mrzString` is created by combining `mrzLine1` and `mrzLine2` and then using `.replace(/ /g, '')` to remove any spaces that might have been introduced during padding or formatting.
3. Copy Functionality:
- An event listener is added to the `mrzOutput` element so that when it is clicked:
- `navigator.clipboard.writeText(this.innerText)` copies the text content of the element (the MRZ string) to the clipboard.