🎨 Palette: Add tactile feedback to interactive elements

[keough99]

💡 What: Added CSS :active states to .btn and .social-card elements to provide continuous tactile feedback during click interactions.
🎯 Why: Elements that use CSS transforms for :hover states (like scale or translateY) feel floaty and unresponsive when clicked if they lack a corresponding :active state.
📸 Before/After: Added screenshots of the new active states.
♿ Accessibility: Improved tactile feedback for mouse users and enhanced overall interactivity cues.

---

PR created automatically by Jules for task 16565064500272664253 started by @keough99

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.