🧹 [chore] Remove unused CSS class 'share-heading'

[Geovannisz]

🎯 What: Removed unused CSS class .footer .share-heading from styles.css.
💡 Why: Dead code clutters the stylesheet, increasing cognitive load for developers and unnecessarily inflating file size. Removing unused code improves codebase maintainability and readability.
✅ Verification: Verified that the class .share-heading does not exist in the HTML structure (index.html). Ran Python's html.parser script to ensure HTML was completely valid. Checked with Git diff that only the target rule was removed and no adjacent rules were accidentally modified.
✨ Result: A cleaner styles.css file without dead code blocks, ready for production use.

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PR created automatically by Jules for task 3673341551362783788 started by @Geovannisz

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[Copilot]

Pull request overview

Removes a dead CSS rule (.footer .share-heading) to keep the stylesheet smaller and easier to maintain.

Changes:

• Deleted the unused .footer .share-heading rule from styles.css.

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