feat: change section icons to #7d7d7d and add top separators to key sections

**Icon Color:**
- Changed section-icon color from var(--text-gray) to #7d7d7d
- More consistent medium gray tone for all section icons

**Top Separators:**
- Added border-top separator to Experience section title
- Added border-top separator to Awards section title
- Added border-top separator to Courses section title
- Separators use same style as bottom separators: 1px solid rgba(0, 0, 0, 0.1)
- Added 20px padding-top for proper spacing above the separator

**Result:**
- Better visual organization with clear section boundaries
- Consistent separator style throughout the CV

static/css/main.css

@@ -1610,7 +1610,15 @@ a:focus {
 .section-icon {
     vertical-align: middle;
     margin-right: 0.5rem;
-    color: var(--text-gray);
+    color: #7d7d7d;
+}
+
+/* Add top border separator to specific sections */
+#experience .section-title,
+#awards .section-title,
+#courses .section-title {
+    border-top: 1px solid rgba(0, 0, 0, 0.1);
+    padding-top: 20px;
 }
 
 /* Smooth scrolling */