Theme Thumbnail is misaligned in Preview

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.3.1 CE GA2
• Fix Version/s: Master
• Component/s: Liferay Themes
• Labels: None
• Fix Priority: 2
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/91577

The Theme's thumbnail is misaligned in the preview under the Page's Look and Feel section.

Steps to reproduce:

1. Open the Product Menu and go to Site Builder -> Pages under the Site Menu.
2. Click the Cog icon next to Public Pages to configure the Look and Feel.

The Theme thumbnail should fill the entire preview, but it has additional spacing in the top pushing it out of the frame. This is due to inherited styles from the `.card` class in the wrapping element. Removing the `top` styling (highlighted) in the screenshot resolves the issue.