Description

The styles section has an unexpected shadow appearing behind the preview card.

Step-by-step reproduction instructions

Go to Design > Styles or got to the Editor > open on the Styles panel.

Screenshots, screen recording, code snippet

No response

Environment info

No response

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes

Please confirm which theme type you used for testing.

• Block
• Classic
• Hybrid (e.g. classic with theme.json)
• Not sure