Implements a slide-down fade-in animation when the InfoBox expands, improving the user experience with smooth visual transitions.
Changes:
- Add animateDown keyframe animation to Tailwind config
- Apply animation to InfoBox content div when opened
- Animation includes opacity fade, vertical slide, and max-height transition
- Update InfoBox width to use responsive sizing (17rem on mobile, 28rem on larger screens)
- Change icon color to green for better visual consistency
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Co-Authored-By: Claude <noreply@anthropic.com>
