E-commerce Product Page Using TailwindCSS

So the website is finished on most of the desired screen size (responsive design). But there is one problem, it seems that when the website is being open at fullscreen browser, the content (including navbar and main content) will get stretched out to the side. On the other side, when its windowed, even on the max size of the screen it's not stretched out like before (this is what i want). A feedback or solution would be awesome about this issue, thank you in advance.