Add: new resposive image gallery css

archivist/static/css/main.css

@@ -242,6 +242,95 @@
 	text-decoration: underline;
 }
 
+
+/*=================================================================
+    Responsive image gallery
+=================================================================*/
+    
+.gallery-container {
+    display: flex;
+    flex-wrap: wrap;
+    justify-content: center;
+    gap: 20px; /* Adjust the gap between items */
+}
+
+.gallery-item {
+    height: 20vh;
+    position: relative; /* Positioning context for the overlay */
+    overflow: hidden; /* Ensure that the content does not overflow the set height */
+    display: flex; /* Use Flexbox for vertical centering */
+    justify-content: center; /* Center horizontally */
+    align-items: center; /* Center vertically */
+    border-radius: 1vmin;
+    border: 2px solid black;
+}
+
+.gallery-item img {
+    max-height: 100%;
+    /* min-width: 50%; */
+    object-fit: contain;
+    vertical-align: bottom;
+    border-radius: 1vmin;
+}
+
+/* ADVANCED */
+
+/* Portrait */
+
+@media (max-aspect-ratio: 1/1) {
+    .gallery-item {
+        height: 30vh;
+    }
+}
+
+/* Short screens */
+
+@media (max-height: 480px) {
+    .gallery-item {
+        height: 80vh;
+    }
+}
+
+/* Smaller screens in portrait */
+
+@media (max-aspect-ratio: 1/1) and (max-width: 480px) {
+    .gallery-container {
+        flex-direction: row;
+    }
+    
+    .gallery-item {
+        height: auto;
+        width: 100%;
+    }
+    
+    .gallery-item img {
+        width: 100%;
+        max-height: 75vh;
+        min-width: 0;
+    }
+}
+
+.overlay {
+    position: absolute;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background: rgba(0, 0, 0, 0.8); /* Semi-transparent black background */
+    color: white;
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+    opacity: 0; /* Hide the overlay by default */
+    transition: opacity 0.3s ease; /* Smooth transition for the overlay */
+}
+
+.gallery-item:hover .overlay {
+    opacity: 1; /* Show the overlay on hover */
+}
+
+
 /*=================================================================
     Site icon overlay on gallery
 =================================================================*/