fixed css on share button

app.py

@@ -42,6 +42,12 @@ a {text-decoration-line: underline; font-weight: 600;}
   max-width: 13rem;
 }
 
+div#share-btn-container > div {
+    flex-direction: row;
+    background: black;
+    align-items: center;
+}
+
 #share-btn-container:hover {
   background-color: #060606;
 }