🎨 Palette: Add active states to interactive elements

[keough99]

💡 What: Added :active CSS states for .btn and .social-card elements to complement their existing :hover states. Buttons scale down slightly (scale(0.98)) and social cards reduce their upward translation (translateY(-2px)).
🎯 Why: To improve micro-UX by providing continuous, satisfying tactile feedback during mouse interactions (mousedown/mouseup events).
📸 Before/After: Screenshots taken during verification show the active states during interaction.
♿ Accessibility: The changes do not interfere with keyboard focus styles, ensuring a consistent experience for all users while adding polish for pointer interactions.

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PR created automatically by Jules for task 9595523954556197637 started by @keough99

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