🛠 Description

Upgrade Tailwind CSS to version 4.

✅ Acceptance Criteria

• Update tailwind.config.js to v4 specifications.
• Ensure all existing Tailwind classes are compatible with v4.
• Test responsiveness and styling changes after upgrade.
• Update any deprecated classes or configurations.
• Ensure build process reflects changes without errors.

📋 Implementation Notes

Use the Tailwind CSS migration guide for step-by-step instructions. Pay attention to any breaking changes and adjust custom styles as needed.