diff --git a/archivist/static/css/main.css b/archivist/static/css/main.css
index 6977b6d..31f4bea 100644
--- a/archivist/static/css/main.css
+++ b/archivist/static/css/main.css
@@ -406,6 +406,29 @@ body{
     opacity: 1; /* Show the overlay on hover */
 }
 
+.seen-overlay {
+    position: absolute;
+    z-index: 2;
+    left: 0;
+    bottom: 0;
+    font-size: 13px;
+    font-weight: 700;
+    line-height: 14px;
+    letter-spacing: .5px;
+    color: #232326;
+    background-color: #414141;
+    border: 1.25px solid #232326;
+    border-radius: 0 1vmin 0 1vmin;
+    white-space: nowrap;
+    padding: 4px 6px 4px;
+    margin: 0 1px 0 0;
+    cursor: pointer;
+    opacity: .8;
+}
+
+.seen-overlay[data-seen="false"] {
+    display: none;
+}
 
 /*=================================================================
     Site icon overlay on gallery