fix: use default building icon for Megabanner instead of broken image

- Replaced broken megabanner.png with iconify building icon
- Updated CSS to support both img and iconify-icon in responsibilities grid
- Added styling for default-company-icon in responsibilities
- Maintains consistent 60px icon size and grid layout

static/css/main.css

@@ -778,7 +778,8 @@ iconify-icon {
 }
 
 /* Responsibilities with company logos (similar to main experience layout) */
-.responsibilities li:has(img) {
+.responsibilities li:has(img),
+.responsibilities li:has(iconify-icon) {
     display: grid;
     grid-template-columns: 60px 1fr;
     gap: 1rem;
@@ -787,7 +788,8 @@ iconify-icon {
     align-items: start;
 }
 
-.responsibilities li:has(img):before {
+.responsibilities li:has(img):before,
+.responsibilities li:has(iconify-icon):before {
     display: none;
 }
 
@@ -801,6 +803,19 @@ iconify-icon {
     padding: 4px;
 }
 
+.responsibilities li iconify-icon.default-company-icon {
+    width: 60px;
+    height: 60px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    border-radius: 4px;
+    border: 1px solid #ddd;
+    background: #f5f5f5;
+    color: #999;
+    padding: 8px;
+}
+
 /* Education */
 .education-item {
     margin-bottom: 1rem;