🐞 fix: Update main nav styling

Co-authored-by: Copilot <copilot@github.com>

styles/navigation/nav-main-default.css

@@ -26,9 +26,14 @@
                 /* spacing & display */
                 @apply flex items-center px-4 -my-4 no-underline;
                 height: calc(100% + 2rem);
+            }
 
-                /* interaction */
-                &:hover {
+            /* Hover state: triggered by li so it persists when moving into the submenu.
+               Also triggered when a submenu is open (e.g. via keyboard/click). */
+            &:hover,
+            &:has(.menu-vdi__toggle[aria-expanded="true"]) {
+                >a,
+                >.menu-vdi__toggle {
                     @apply bg-cwc-blue-02 text-light;
                     box-shadow: inset 0 -4px 0 #F26B53;
                 }
@@ -37,17 +42,18 @@
             &.menu-vdi__item--contact {
                 @apply h-auto;
 
+                /* Override the li:hover rule above — contact keeps its own button style */
+                &:hover > a {
+                    @apply bg-transparent;
+                    box-shadow: none;
+                }
+
                 >a {
                     @apply ml-2 mr-0 my-0;
                     height: auto;
                     background: linear-gradient(93.03deg, #F26B53 0%, #D24D32 100%);
                     border-radius: 1.25rem 0.25rem;
                     padding: .5rem 2rem;
-
-                    &:hover {
-                        box-shadow: none;
-                        background: linear-gradient(93.03deg, #F26B53 0%, #D24D32 100%);
-                    }
                 }
             }
         }
@@ -63,11 +69,12 @@
         .menu-vdi__submenu {
             top: calc(100% + 1rem);
 
-            @apply bg-cwc-blue-02 shadow-lg left-4 w-64 flex-col;
+            @apply bg-cwc-blue-02 shadow-lg left-0 w-64 flex-col rounded-b-lg ml-0;
 
             >li {
                 @apply w-full border-b border-[#D24D32];
-                &:last-child { @apply border-b-0; }
+
+                &:last-child { @apply border-b-0 rounded-b-lg; }
             }
 
             .menu-vdi__item {