Kilotest: Diagnoses of invalid CSS at-rule violation by HTML element 0 on Buy Nothing Project contact page

Basics

About the page

• URL: https://buynothingproject.org/contact
• Tested 3 days ago on 2026-10-07 at 19:48 by job 261007T1941-dyc
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 12
    • Reported any rule violations: 11
  • Violations: 738
  • Violators: 258
  • Issues: 47
• Download the full technical report (JSON)

About the issue

• Why it matters: Page cannot be properly displayed in particular contexts
• Priority: high
• Related WCAG standard: 4.1
• Reported by 1 rule engine (Html Checker API)
• Violations: 2
• Violators: 1

About the violator

• Tag name: HTML
• Text: [not applicable]
• Start tag: <html lang="en" data-redirect-timezone="1" dir="ltr">
• XPath: /html
• Bounding box: x = 0, y = 0, width = 1920, height = 1307
• Reported by Html Checker API

Diagnoses

Here is how rule engines diagnose the invalid CSS at-rule issue for HTML element 0 of the Buy Nothing Project contact page.

1. Style rule :root body not allowed outside an @scope rule in a style element in body. Extract: style[1]">:root body { bac

   Rule engine: Html Checker API (World Wide Web Consortium)

   Rule: Style rule :root body not allowed outside an @scope rule in a style element in body.

2. Style rule html body not allowed outside an @scope rule in a style element in body. Extract: style[1]">html body { bac

   Rule engine: Html Checker API (World Wide Web Consortium)

   Rule: Style rule html body not allowed outside an @scope rule in a style element in body.