Fixed the alignment of the card style

[vanshikakhator]

the card was not aligned properly so using css ,i aligned all the boxes and made it responsive whenever when open it in any device
After changes:

[greptile-apps]

Greptile Summary

This PR addresses card alignment issues in the CodeClip application's challenge display interface. The changes implement a two-pronged approach to fix card height inconsistencies:

HTML Changes (index.html): The developer added Bootstrap flexbox utilities to the challenge card container and individual cards. Key additions include g-3 align-items-stretch to the container for consistent spacing and equal height alignment, and d-flex flex-fill flex-column classes to each card structure. The mt-auto class was added to CTA buttons to push them to the bottom of each card.

CSS Changes (styles.css): The original card styling approach was completely replaced. The old system used fixed heights (250px) which caused alignment issues with varying content lengths. The new implementation uses flexbox with flex: 1 and min-height: 350px to ensure cards stretch to equal heights, along with justify-content: space-between for proper content distribution.

These changes integrate with CodeClip's existing challenge browsing functionality, specifically targeting the visual presentation layer that users interact with when exploring coding challenges. The solution addresses a common UI problem in card-based layouts where content of different lengths creates visual inconsistency.

Confidence score: 1/5

• This PR has critical implementation conflicts that will likely cause CSS issues and layout problems in production.
• The CSS changes conflict with the Bootstrap approach used in HTML, create duplicate styles with main.css, and include syntax errors with unmatched closing braces.
• Files needing attention: styles.css (syntax errors and conflicting implementation), index.html (verify Bootstrap integration works correctly).

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[vanshikakhator]

@adityai0 plsss merge the file