Kilotest: Diagnoses of invalid CSS at-rule violation by HTML element 0 on Charity Navigator page

Basics

About the page

• URL: https://www.charitynavigator.org/
• Tested 3 days ago on 2026-10-07 at 19:56 by job 261007T1941-rxh
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 12
    • Reported any rule violations: 11
  • Violations: 720
  • Violators: 293
  • 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: 23
• 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 = 4736
• Reported by Html Checker API

Diagnoses

Here is how rule engines diagnose the invalid CSS at-rule issue for HTML element 0 of the Charity Navigator page.

1. Style rule .intercom-lightweight-app not allowed outside an @scope rule in a style element in body. Extract: } } .intercom-lightweight-app {

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

   Rule: Style rule .intercom-lightweight-app not allowed outside an @scope rule in a style element in body.

2. Style rule .intercom-lightweight-app-gradient not allowed outside an @scope rule in a style element in body. Extract: "; } .intercom-lightweight-app-gradient {

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

   Rule: Style rule .intercom-lightweight-app-gradient not allowed outside an @scope rule in a style element in body.

3. Style rule .intercom-lightweight-app-launcher not allowed outside an @scope rule in a style element in body. Extract: t; } .intercom-lightweight-app-launcher {

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

   Rule: Style rule .intercom-lightweight-app-launcher not allowed outside an @scope rule in a style element in body.

4. Style rule .intercom-lightweight-app-launcher:hover not allowed outside an @scope rule in a style element in body. Extract: ; } .intercom-lightweight-app-launcher:hover {

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

   Rule: Style rule .intercom-lightweight-app-launcher:hover not allowed outside an @scope rule in a style element in body.

5. Style rule .intercom-lightweight-app-launcher:active not allowed outside an @scope rule in a style element in body. Extract: 1) } .intercom-lightweight-app-launcher:active {

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

   Rule: Style rule .intercom-lightweight-app-launcher:active not allowed outside an @scope rule in a style element in body.

6. Style rule .intercom-lightweight-app-launcher:focus not allowed outside an @scope rule in a style element in body. Extract: ; } .intercom-lightweight-app-launcher:focus {

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

   Rule: Style rule .intercom-lightweight-app-launcher:focus not allowed outside an @scope rule in a style element in body.

7. Style rule .intercom-lightweight-app-launcher-icon not allowed outside an @scope rule in a style element in body. Extract: } .intercom-lightweight-app-launcher-icon {

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

   Rule: Style rule .intercom-lightweight-app-launcher-icon not allowed outside an @scope rule in a style element in body.

8. Style rule .intercom-lightweight-app-launcher-icon-open not allowed outside an @scope rule in a style element in body. Extract: r; } .intercom-lightweight-app-launcher-icon-open {

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

   Rule: Style rule .intercom-lightweight-app-launcher-icon-open not allowed outside an @scope rule in a style element in body.

9. Style rule .intercom-lightweight-app-launcher-icon-open svg not allowed outside an @scope rule in a style element in body. Extract: } .intercom-lightweight-app-launcher-icon-open svg {

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

   Rule: Style rule .intercom-lightweight-app-launcher-icon-open svg not allowed outside an @scope rule in a style element in body.

10. Style rule .intercom-lightweight-app-launcher-icon-open svg path not allowed outside an @scope rule in a style element in body. Extract: x; } .intercom-lightweight-app-launcher-icon-open svg path {

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

    Rule: Style rule .intercom-lightweight-app-launcher-icon-open svg path not allowed outside an @scope rule in a style element in body.

11. Style rule .intercom-lightweight-app-launcher-icon-self-serve not allowed outside an @scope rule in a style element in body. Extract: d; } .intercom-lightweight-app-launcher-icon-self-serve {

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

    Rule: Style rule .intercom-lightweight-app-launcher-icon-self-serve not allowed outside an @scope rule in a style element in body.

12. Style rule .intercom-lightweight-app-launcher-icon-self-serve svg not allowed outside an @scope rule in a style element in body. Extract: } .intercom-lightweight-app-launcher-icon-self-serve svg {

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

    Rule: Style rule .intercom-lightweight-app-launcher-icon-self-serve svg not allowed outside an @scope rule in a style element in body.

13. Style rule .intercom-lightweight-app-launcher-icon-self-serve svg path not allowed outside an @scope rule in a style element in body. Extract: x; } .intercom-lightweight-app-launcher-icon-self-serve svg path {

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

    Rule: Style rule .intercom-lightweight-app-launcher-icon-self-serve svg path not allowed outside an @scope rule in a style element in body.

14. Style rule .intercom-lightweight-app-launcher-custom-icon-open not allowed outside an @scope rule in a style element in body. Extract: d; } .intercom-lightweight-app-launcher-custom-icon-open {

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

    Rule: Style rule .intercom-lightweight-app-launcher-custom-icon-open not allowed outside an @scope rule in a style element in body.

15. Style rule .intercom-lightweight-app-launcher-icon-minimize not allowed outside an @scope rule in a style element in body. Extract: } .intercom-lightweight-app-launcher-icon-minimize {

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

    Rule: Style rule .intercom-lightweight-app-launcher-icon-minimize not allowed outside an @scope rule in a style element in body.

16. Style rule .intercom-lightweight-app-launcher-icon-minimize svg path not allowed outside an @scope rule in a style element in body. Extract: } .intercom-lightweight-app-launcher-icon-minimize svg path {

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

    Rule: Style rule .intercom-lightweight-app-launcher-icon-minimize svg path not allowed outside an @scope rule in a style element in body.

17. Style rule .intercom-lightweight-app-launcher.intercom-launcher-extended not allowed outside an @scope rule in a style element in body. Extract: yles */ .intercom-lightweight-app-launcher.intercom-launcher-extended {

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

    Rule: Style rule .intercom-lightweight-app-launcher.intercom-launcher-extended not allowed outside an @scope rule in a style element in body.

18. Style rule .intercom-lightweight-app-launcher.intercom-launcher-extended .intercom-lightweight-app-launcher-icon not allowed outside an @scope rule in a style element in body. Extract: } .intercom-lightweight-app-launcher.intercom-launcher-extended .intercom-lightweight-app-launcher-icon {

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

    Rule: Style rule .intercom-lightweight-app-launcher.intercom-launcher-extended .intercom-lightweight-app-launcher-icon not allowed outside an @scope rule in a style element in body.

19. Style rule .intercom-lightweight-app-launcher-text not allowed outside an @scope rule in a style element in body. Extract: x; } .intercom-lightweight-app-launcher-text {

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

    Rule: Style rule .intercom-lightweight-app-launcher-text not allowed outside an @scope rule in a style element in body.

20. Style rule .intercom-lightweight-app-messenger not allowed outside an @scope rule in a style element in body. Extract: r; } .intercom-lightweight-app-messenger {

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

    Rule: Style rule .intercom-lightweight-app-messenger not allowed outside an @scope rule in a style element in body.

21. Style rule .intercom-lightweight-app-messenger-header not allowed outside an @scope rule in a style element in body. Extract: x; } .intercom-lightweight-app-messenger-header {

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

    Rule: Style rule .intercom-lightweight-app-messenger-header not allowed outside an @scope rule in a style element in body.

22. Style rule .intercom-lightweight-app-messenger-footer not allowed outside an @scope rule in a style element in body. Extract: f; } .intercom-lightweight-app-messenger-footer{

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

    Rule: Style rule .intercom-lightweight-app-messenger-footer not allowed outside an @scope rule in a style element in body.

23. Style rule .intercom-lightweight-app not allowed outside an @scope rule in a style element in body. Extract: int { .intercom-lightweight-app {

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

    Rule: Style rule .intercom-lightweight-app not allowed outside an @scope rule in a style element in body.