WIP Add basic photo gallery

app/styles/app.css

@@ -909,6 +909,7 @@ abbr[title] {
 }
 
 .carousel-slide {
+  cursor: pointer;
   position: relative;
   flex: 0 0 100%;
   scroll-snap-align: start;
@@ -1866,3 +1867,80 @@ button.create-place {
 .btn-link:hover {
   text-decoration: underline;
 }
+
+/* Photo Gallery */
+.photo-gallery-overlay {
+  position: fixed;
+  inset: 0;
+  background: rgb(0 0 0 / 80%);
+  z-index: 9999;
+  display: flex;
+  flex-direction: column;
+}
+
+.photo-gallery-overlay .photo-gallery-content {
+  width: 100%;
+  height: 100%;
+  display: flex;
+  flex-direction: column;
+  position: relative;
+}
+
+.photo-gallery-overlay .close-btn {
+  position: absolute;
+  top: 0.5rem;
+  right: 1rem;
+  width: 48px;
+  height: 48px;
+  z-index: 10;
+  color: white;
+  background: transparent;
+  border-radius: 50%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  transition: background-color 0.2s ease;
+}
+
+@media (width <= 768px) {
+  .photo-gallery-overlay .close-btn {
+    right: 0.5rem;
+  }
+}
+
+.photo-gallery-overlay .main-photo-container {
+  flex: 1;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 2rem;
+  overflow: hidden;
+}
+
+.photo-gallery-overlay .main-photo-container img {
+  max-width: 100%;
+  max-height: 100%;
+  object-fit: contain;
+}
+
+.photo-gallery-overlay .thumbnail-strip {
+  height: 100px;
+  display: flex;
+  gap: 0.5rem;
+  padding: 1rem;
+  overflow-x: auto;
+  background: rgb(0 0 0 / 50%);
+}
+
+.photo-gallery-overlay .thumbnail-strip .thumbnail {
+  height: 100%;
+  flex-shrink: 0;
+  cursor: pointer;
+}
+
+.photo-gallery-overlay .thumbnail-strip img {
+  height: 100%;
+  width: auto;
+  object-fit: cover;
+  border-radius: 4px;
+}