Make “Out of Stock” label more prominent on single product page

Message:
Hello,

I would like to make the “Out of Stock” label more noticeable on the single product page.
Currently, on the shop page (category view), the label is very clear and visible (red background, bold font), but on the individual product page, it appears small and not visually prominent.

I have read several related posts on the forum and wanted to ask if there is a specific CSS snippet that could be used to achieve a similar visual style on the product page.

If this topic has already been covered elsewhere, please accept my apologies in advance.

You can see the comparison between the two pages in the attached screenshots.

Thank you very much for your time and assistance!

Best regards,
Fani