Bug: `no-invalid-at-rules` rejects page margin at-rules

[Pixel998]

Environment

ESLint version: v10.8.0
@eslint/css version: v1.4.0
Node version: v24.18.0
npm version: v11.16.0
Operating System: windows

Which language are you using?

stylesheet

What did you do?

Configuration

import css from "@eslint/css";

export default [
  {
    files: ["**/*.css"],
    plugins: { css },
    language: "css/css",
    rules: {
      "css/no-invalid-at-rules": "error",
    },
  },
];

@page {
  @top-left {
    /* page-margin-properties */
  }
}

What did you expect to happen?

@top-left should be accepted as a page margin at-rule when nested inside @page, so no-invalid-at-rules should report no error.

What actually happened?

Unknown at-rule '@top-left' found.

Link to Minimal Reproducible Example

https://stackblitz.com/edit/stackblitz-starters-gnlz6acj

Participation

• I am willing to submit a pull request for this issue.

AI acknowledgment

• I did not use AI to generate this issue report.
• (If the above is not checked) I have reviewed the AI-generated content before submitting.

Additional comments

https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules/@page#margin_at-rules

[DMartens]

Makes sense to me update the definition to stay up to date, so marking as accepted.

[eslint-github-bot]

👋 Hi! This issue is being addressed in pull request #543. Thanks, @Pixel998!