refactor: wrap content in zoom-wrapper to fix footer gap issue

- Created zoom-wrapper div around cv-container
- Zoom now applies to wrapper only, footer adjusts naturally below
- Footer no longer scaled, stays at normal size
- Fixes gap between content and footer at low zoom levels
- Reduced back-to-top button size (35px default, grows to 50px on hover)
- Cleaner separation of concerns for zoom functionality

static/css/main.css

@@ -491,6 +491,13 @@ iconify-icon {
     100% { transform: rotate(360deg); }
 }
 
+/* Zoom Wrapper - wraps cv-container for zoom functionality */
+.zoom-wrapper {
+    transform-origin: top center; /* Scale from top center */
+    transition: transform 0.08s linear; /* Smooth zoom response */
+    will-change: transform; /* Optimize for transforms */
+}
+
 /* Main CV Container */
 .cv-container {
     width: 100%;
@@ -498,9 +505,6 @@ iconify-icon {
     margin: 0 auto;
     padding: 20px 0 0 0; /* Top padding to prevent sticky action bar overlap */
     display: block; /* Changed from flex */
-    transform-origin: top center; /* Scale from top center - container stays anchored at top */
-    transition: transform 0.08s linear; /* Smooth, immediate zoom response */
-    will-change: transform; /* Hint browser to optimize for transforms */
 }
 
 /* Clean theme - no sidebars, centered content */
@@ -1700,9 +1704,6 @@ a:focus {
     padding: 20px 0;
     margin: 0;
     grid-column: 1 / -1; /* Span all columns */
-    transform-origin: top center; /* Scale from top center - footer stays anchored at top */
-    transition: transform 0.08s linear; /* Smooth, immediate zoom response */
-    will-change: transform; /* Hint browser to optimize for transforms */
 }
 
 .footer-content {
@@ -2578,8 +2579,8 @@ html {
     position: fixed;
     bottom: 2rem;
     right: 2rem;
-    width: 50px;
-    height: 50px;
+    width: 35px; /* Smaller default size */
+    height: 35px;
     background: var(--black-bar);
     color: white;
     border: none;
@@ -2596,7 +2597,7 @@ html {
 
 .back-to-top:hover {
     opacity: 1;
-    transform: translateY(-3px);
+    transform: translateY(-3px) scale(1.43); /* Grow to ~50px on hover */
     box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
     background: #3a3a3a;
 }