To put it simply, my static site (made using HTML, CSS and JS) looks completely different when viewed from my custom domain. The text sizes become small and the background becomes all misaligned.
My vercel domain however shows the site correctly.
For reference, my custom domain: Home - Enoshiro My vercel domain: Home - Enoshiro
It works if I redirect my custom domain to my vercel domain.
EDIT: NVM, it was viewing error. My browser was set to 75% zoom.