feat: add separators after last experience, award, and course items

**Changes:**
- Added border-bottom separator to all experience items (including last)
- Removed :last-child rule for course items (keep border on last item)
- Removed :last-child rule for award items (keep border on last item)

**Result:**
- Visual separator now appears after ALL items in each section
- Consistent spacing between sections
- Better visual organization

static/css/main.css

@@ -807,6 +807,15 @@ iconify-icon {
     font-style: italic;
 }
 
+/* Experience Items */
+.experience-item {
+    margin-bottom: 2.5rem;
+    padding-bottom: 2rem;
+    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
+}
+
+/* Keep border on all experience items including last one */
+
 /* Courses */
 .course-item {
     display: flex;
@@ -817,11 +826,7 @@ iconify-icon {
     border-bottom: 1px solid rgba(0, 0, 0, 0.1);
 }
 
-.course-item:last-child {
-    border-bottom: none;
-    padding-bottom: 0;
-    margin-bottom: 0;
-}
+/* Keep border on all course items including last one */
 
 .course-icon {
     flex-shrink: 0;
@@ -1334,10 +1339,7 @@ a:focus {
     transition: gap 0.3s ease-in-out;
 }
 
-.award-item:last-child {
-    border-bottom: none;
-    padding-bottom: 0;
-}
+/* Keep border on all award items including last one */
 
 /* Adjust gap when logos are hidden */
 .cv-paper:not(.show-logos) .award-item {