The deployed site was run through the official W3C validators.

URL checked: https://storage.googleapis.com/uttamsai-digital-art-supplies/index.html

Result: Document checking completed. No errors or warnings to show.

The only messages returned were 4 informational notices about trailing slashes on self-closing void elements (<meta ... />, <link ... />) — these are not errors; the validator explicitly says the trailing slash "has no effect." This is just how Vite/React's build output formats void tags.

Result: 2 errors, 242 warnings — all of them originate from Bootstrap 5's own bundled stylesheet, not from this project's custom CSS.

• The 2 "Parse Error"s are both on a :-webkit-autofill vendor-prefixed pseudo-class inside Bootstrap's form-floating styles — the CSS validator doesn't recognize non-standard WebKit pseudo-classes.
• The 242 warnings are almost entirely "is a vendor extension" notices (-webkit-text-size-adjust, -webkit-tap-highlight-color, etc.) and "CSS variables are currently not statically checked" notices — expected side effects of validating a modern CSS framework that relies on CSS custom properties and vendor prefixes for cross-browser support.