Description

The Accordion Panel should not have any visual presence unless the panel is expanded. However, the block has padding or border applied, the border or part of the content is visible.

I think we should add some CSS to solve this problem.

Step-by-step reproduction instructions

• Insert an Accordion block
• Apply padding and border styles to the Accordion Header block.
• Open the front end.
• Confirm that the border is displayed and the contents are displayed although the panel is not expanded.

Screenshots, screen recording, code snippet

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