Condense footer from 5 columns to 3

Merged Company + Support into a single Help column, removed Sub
Categories section. Tightened grid gap, padding, and list spacing.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

assets/css/style.css

@@ -647,14 +647,14 @@ img {
 .footer {
     background: var(--color-text);
     color: white;
-    padding: 4rem 0 2rem;
+    padding: 2.5rem 0 1.5rem;
 }
 
 .footer-grid {
     display: grid;
-    grid-template-columns: 2fr 1fr 1fr 1fr;
-    gap: 3rem;
-    margin-bottom: 3rem;
+    grid-template-columns: 2fr 1fr 1fr;
+    gap: 2rem;
+    margin-bottom: 2rem;
 }
 
 .footer-brand p {
@@ -675,7 +675,7 @@ img {
 }
 
 .footer-links li {
-    margin-bottom: 0.75rem;
+    margin-bottom: 0.5rem;
 }
 
 .footer-links a {