Issue #3574766: Fix stylelint errors in CSS

Gábor Hojtsyrequested to merge
issue/upgrade_status-3574766:3574766-fix-stylelint-issues into 4.x
  • Fix animation-direction: forwards -> animation-fill-mode: forwards (forwards is not a valid value for animation-direction)
  • Collapse two multi-line selectors to single lines per prettier formatting

Co-Authored-By: Claude Sonnet 4.6 noreply@anthropic.com

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