Update app.py

app.py

@@ -37,12 +37,15 @@ def generate_html(ids):
     html_content += '''
         figure {
             display: inline-block;
-            margin: 1px;
             text-align: center;
             font-family: Arial, sans-serif;
         }
         figcaption {
             margin-top: 5px;
+            color: black;
+            background-color: white;
+            padding: 5px;
+            border-radius: 5px;
         }
         img {
             background-color: white;