SEO, Performance, Clean coding & use of style TAG within head and body, usage of long js codes!

[Reaper520]

Hello... I hope to bring to a conclusion a topic I have been trying to clarify for a long time with your contribution as well... In terms of SEO, clean coding, and page speed, what do you think is more suitable and which ones are risky? a) Writing CSS codes only in style.css files and pulling the style.css files as external files b) Writing CSS codes inside the <style> tag c) Writing CSS codes inside the elements as <style> tags d) Putting CSS codes inside the <style> tag! I realize that this last option seems very unnecessary and contrary to clean coding principles. I also have never used this method but I have encountered it even on professional websites... What is the logic and rationale behind this!? I wonder every time I see it... Example: Responsive Advertisement .sora-ads-here { display: block; background-color: #eee; text-align: center; font-size: 13px; color: #aaaaaa; font-weight: 400; } The same situation applies to long JS codes written inside a page... Are there any CLEAR criteria, rules, or agreed-upon systems regarding how the structure and content of a page should be? What do you believe is ideal? I would appreciate it if you could share your opinions...