Kilotest: Diagnoses of invalid at-rule violation by HTML element 0 on Cátedra UNESCO Legislación, Sociedad y Patrimonio page

Basics

About the Cátedra UNESCO Legislación, Sociedad y Patrimonio page

URL: https://catedrapatrimonio.wixsite.com/ugto
Tested 13 days ago by job auj on 2026-07-07 at 18:07

About HTML element 0

Tag name: HTML
Text: [not applicable]
Start tag: <html lang="es" style="scroll-padding-top: 0px;">
XPath: /html
Bounding box: x = 0, y = 0, width = 1920, height = 1080

About the invalid at-rule issue

Why it matters: Document cannot be properly displayed in particular contexts
Priority: high
Related WCAG standard: 4.1

Diagnoses

Here is how rule engines diagnose the invalid at-rule issue for HTML element 0 of the Cátedra UNESCO Legislación, Sociedad y Patrimonio page.

CSS: Unrecognized at-rule @view-transition
Tool: Html Checker API (World Wide Web Consortium)