fix: dynamic page height on zoom and footer spacing improvements

Fixed two issues with zoom and footer:

1. Dynamic height adjustment based on zoom level:
   - Store original height on first zoom (dataset.originalHeight)
   - Calculate scaled height: originalHeight × scale factor
   - Set container height dynamically to match visual content
   - Example: 50% zoom → height = originalHeight × 0.5
   - Prevents empty space below content at low zoom
   - Prevents overflow at high zoom

2. Footer spacing and positioning:
   - Reduced .cv-main bottom padding: 3rem → 1rem
   - Added .cv-footer margin-top: -60px to pull footer up
   - Increased .zoom-control bottom: 70px → 100px
   - Zoom control now clears footer GitHub link

Result:
- Footer appears immediately after content at any zoom level
- No wasted empty space below content
- Zoom control doesn't overlap GitHub link
- Page height dynamically adapts to zoom level

static/js/main.js

@@ -334,9 +334,22 @@
             // Store current scroll position
             const oldScrollTop = window.pageYOffset || document.documentElement.scrollTop;
 
+            // Get the natural height before any transform
+            if (!cvPaper.dataset.originalHeight) {
+                // Store original height on first zoom
+                cvPaper.style.transform = 'scale(1)';
+                cvPaper.dataset.originalHeight = cvPaper.scrollHeight;
+            }
+
+            const originalHeight = parseInt(cvPaper.dataset.originalHeight);
+
             // Apply the new scale
             cvPaper.style.transform = `scale(${newScale})`;
 
+            // Adjust the container height to match the scaled content
+            // This prevents empty space when zooming out and content overflow when zooming in
+            cvPaper.style.height = `${originalHeight * newScale}px`;
+
             // Calculate proportional scroll position to maintain visual position
             // If zooming from 100% to 50%, content at pixel 1000 moves to pixel 500
             // So we need to scroll to pixel 500 to see the same content