Enha: attempt to do modal popup of clue; must be a better way

assets/style.css

@@ -45,3 +45,25 @@ tr{
     border: 1px solid black;
     background-color: darkorange;
 }
+
+@keyframes fadeInDown {
+  from {
+    opacity: 0;
+    transform: translateY(-1rem);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+@keyframes fadeOutUp {
+  from {
+    opacity: 1;
+    transform: translateY(0);
+  }
+  to {
+    opacity: 0;
+    transform: translateY(-1rem);
+  }
+}