Fix card height

[srushti1705]

Fixes #11052

This PR fixes the issue where user cards have uneven heights by applying flexbox styling to ensure consistent layout.

Changes made:

• Updated .card styling to use flexbox
• Ensured uniform height across cards

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• tests pass
• code is in uniquely-named feature branch and has no merge conflicts 📁
• screenshots/GIFs are attached 📎 in case of UI updation
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