Kilotest: Diagnoses of CSS invalid violation by HTML element 0 on Freedom Forum page

Basics

About the page

• URL: https://www.freedomforum.org/
• Tested 3 days ago on 2026-10-07 at 21:29 by job 261007T2113-p0e
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 12
    • Reported any rule violations: 12
  • Violations: 729
  • Violators: 291
  • Issues: 64
• Download the full technical report (JSON)

About the issue

• Why it matters: Page cannot be properly displayed
• Priority: high
• Related WCAG standard: 4.1
• Reported by 1 rule engine (Html Checker API)
• Violations: 8
• Violators: 1

About the violator

• Tag name: HTML
• Text: [not applicable]
• Start tag: <html lang="en-US">
• XPath: /html
• Bounding box: x = 0, y = 0, width = 1920, height = 3691
• Reported by Html Checker API

Diagnoses

Here is how rule engines diagnose the CSS invalid issue for HTML element 0 of the Freedom Forum page.

1. CSS: filter: Parse Error. Extract: pha(opacity = 0);padding: 10px

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

   Rule: CSS: filter: Parse Error.

2. CSS: filter: Parse Error. Extract: a(opacity = 100);}.fl-builder-

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

   Rule: CSS: filter: Parse Error.

3. CSS: gap: px is not a gap value. Extract: ker {gap: px;}.fl-

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

   Rule: CSS: gap: px is not a gap value.

4. CSS: border-color: Parse Error. Extract: 1;border-color: ;}.fl-node-5rd

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

   Rule: CSS: border-color: Parse Error.

5. CSS: Parse Error. Extract: charset "UTF-8";.fl-node-2ienj

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

   Rule: CSS: Parse Error.

6. CSS: Parse Error. Extract: charset "UTF-8";.fl-node-fzyg3

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

   Rule: CSS: Parse Error.

7. CSS: border-color: 'transparent' is not a border-color value. Extract: der-color:'transparent';backg

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

   Rule: CSS: border-color: 'transparent' is not a border-color value.

8. CSS: In CSS1, a class name could start with a digit (".55ft"), unless it was a dimension (".55in"). In CSS2, such classes are parsed as unknown dimensions (to allow for future additions of new units) To make 1AC-form-school a valid class, CSS2 requires the first digit to be escaped: .\31 AC-form-school. Extract: .sf-form .1AC-form-school { wid

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

   Rule: CSS: In CSS1, a class name could start with a digit (".55ft"), unless it was a dimension (".55in"). In CSS2, such classes are parsed as unknown dimensions (to allow for future additions of new units) To make 1AC-form-school a valid class, CSS2 requires the first digit to be escaped: .\31 AC-form-school.