Updated.

app.py

@@ -353,9 +353,7 @@ with blocks:
             with gr.Row():
                 gr.Markdown("# ✉️✨ Submit your solutions", elem_classes="markdown-text")
 
-            with gr.Row():
-
-            login_box = gr.Group(visible=True)
+            login_box = gr.Group(visible=True, elem_id="f1-login-box")
             with login_box:
                 gr.Markdown("Please sign in with Hugging Face to submit")
                 gr.LoginButton(elem_id="hf-login-btn")

src/display/css_html_js.py

@@ -75,6 +75,8 @@ custom_css = """
 .f1-grid-cell:nth-child(3n+1) { border-left: none; }
 .f1-grid-head .f1-grid-cell { font-weight: 600; text-align: center; border-top: none; }
 
+#f1-login-box { width: 800px; }
+
 /* Leaderboard: cap width at 800px and center; keep your chain rule */
 #formulaone-leaderboard-tab-table { max-width: 800px; margin-left: auto; margin-right: auto; }
 #formulaone-leaderboard-tab-table .column .row .column { min-width: 80% !important; }