feat: add comprehensive visual improvements and polished UI

Major visual enhancements for professional look and feel:

**New Components:**
- Skeleton component for loading states
  - Pulse animation
  - Reusable for any content type
  - Consistent styling

**Enhanced Animations:**
- Added 8 new custom animations:
  - fade-in (smoother 0.3s)
  - slide-up/down (enhanced 0.4s)
  - slide-in-right/left (directional)
  - scale-in (zoom effect)
  - bounce-gentle (subtle bounce)
  - shimmer (loading effect)

**Global Visual Improvements:**
- Smooth theme transitions (200ms cubic-bezier)
- Custom scrollbar styling with hover states
- Smooth scroll behavior enabled
- Theme transitioning class to prevent flash
- Better transition timing functions

**Component Enhancements:**

1. Home Page:
   - Staggered fade-in animations (0s, 0.1s, 0.2s-0.4s delays)
   - Scale animations on feature cards
   - Hover effects with shadow and border color change
   - Responsive padding adjustments
   - Enhanced button hover (scale + shadow)

2. ColorSwatch:
   - Improved hover scale (105% → 110%)
   - Added shadow on hover
   - Backdrop blur on overlay
   - Active state scale down (95%)
   - Smoother transitions (200ms)
   - Scale-in animation for copy icon

3. Button Component:
   - Active state scale down effect
   - Shadow on hover for primary/destructive
   - Border color change on outline hover
   - Smoother transitions (200ms)
   - Focus ring offset for better visibility

**Micro-interactions:**
- All buttons have active:scale-95
- Cards lift on hover with shadows
- Smooth color transitions on theme switch
- Icons animate on appearance
- Links scale up on hover

**Visual Consistency:**
- Consistent timing (200ms for interactions)
- Unified hover patterns across components
- Standardized shadow depths
- Better focus indicators
- Smooth scroll throughout

**Performance:**
- No janky transitions
- Optimized animations (transform + opacity)
- Hardware-accelerated properties
- Minimal repaints

The UI now feels polished, professional, and delightful to use!

Build successful - all visual enhancements working.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/globals.css

@@ -57,3 +57,38 @@
     @apply bg-background text-foreground;
   }
 }
+
+/* Smooth transitions for theme switching */
+* {
+  transition-property: background-color, border-color, color, fill, stroke;
+  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
+  transition-duration: 200ms;
+}
+
+/* Disable transitions during theme switch to prevent flash */
+.theme-transitioning * {
+  transition: none !important;
+}
+
+/* Smooth scroll */
+html {
+  scroll-behavior: smooth;
+}
+
+/* Custom scrollbar */
+::-webkit-scrollbar {
+  width: 10px;
+  height: 10px;
+}
+
+::-webkit-scrollbar-track {
+  @apply bg-background;
+}
+
+::-webkit-scrollbar-thumb {
+  @apply bg-muted-foreground/20 rounded-lg;
+}
+
+::-webkit-scrollbar-thumb:hover {
+  @apply bg-muted-foreground/30;
+}