feat: Enhance gallery functionality with lightbox feature and improve icon sprite accessibility

- Added a lightbox feature for gallery images, allowing users to view photos in a modal with navigation controls.
- Updated the SVG sprite to include inline styles for better accessibility.
- Increased CSS specificity by doubling the `.vc-app` class to ensure styles override Astra theme defaults.
- Introduced new shortcodes for bus tours, about section, and articles in the VC_Sections class.
- Improved the handling of featured images in the single tour template for sharper display.
- Updated version number to 1.8.15.

astra-child-hoponhopoff/assets/chrome.css

@@ -421,6 +421,7 @@
 }
 
 .hoho .ring-badge--top .ring-badge__text {
+  fill: #808080;
   font-size: 0.625rem;
   letter-spacing: 0.02em;
 }
@@ -546,15 +547,26 @@
   box-shadow: 0 1.25rem 2.5rem rgba(0, 0, 0, 0.18);
   opacity: 0;
   visibility: hidden;
-  transform: translateY(-0.375rem);
-  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), visibility 0.2s;
+  transform: translateY(-0.4rem) scale(0.97);
+  transform-origin: top center;
+  /* Exit: fade/slide out, then flip visibility only once the fade is done, so
+     the close animates instead of snapping. */
+  transition:
+    opacity 0.16s var(--ease),
+    transform 0.16s var(--ease),
+    visibility 0s linear 0.16s;
 }
 
 .hoho .nav__item--has-menu:hover .nav__submenu,
 .hoho .nav__toggle[aria-expanded="true"]+.nav__submenu {
   opacity: 1;
   visibility: visible;
-  transform: translateY(0);
+  transform: translateY(0) scale(1);
+  /* Enter: a slightly longer, soft ease-out so it settles in gently. */
+  transition:
+    opacity 0.24s var(--ease),
+    transform 0.28s cubic-bezier(0.16, 1, 0.3, 1),
+    visibility 0s;
 }
 
 .hoho .nav__submenu a {
@@ -1868,14 +1880,24 @@
     box-shadow: 0 1.5rem 3rem rgba(0, 0, 0, 0.22);
     opacity: 0;
     visibility: hidden;
-    transform: translateY(-0.5rem);
-    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), visibility 0.25s;
+    transform: translateY(-0.6rem) scale(0.98);
+    transform-origin: top right;
+    /* Exit: fade/slide up, then hide once the fade completes. */
+    transition:
+      opacity 0.18s var(--ease),
+      transform 0.18s var(--ease),
+      visibility 0s linear 0.18s;
   }
 
 .hoho .nav.is-open {
     opacity: 1;
     visibility: visible;
-    transform: translateY(0);
+    transform: translateY(0) scale(1);
+    /* Enter: soft ease-out settle. */
+    transition:
+      opacity 0.26s var(--ease),
+      transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
+      visibility 0s;
   }
 
 .hoho .nav__list {