Update app.py

app.py

@@ -1,30 +1,35 @@
 import gradio as gr
 
 with gr.Blocks(css="""
-body { background-color: #111; color: white; }
+body { background-color: #111; color: white; margin: 0; padding: 0; }
+
+.full-center {
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+    height: 100vh;
+    text-align: center;
+}
+
 a.button-link {
     display: inline-block;
-    padding: 10px 20px;
-    background-color: #0056b3;
+    padding: 12px 24px;
+    background-color: #007bff;
     color: white;
-    border-radius: 5px;
+    border-radius: 6px;
     text-decoration: none;
     font-size: 16px;
-    margin-top: 10px;
-}
-a.button-link:hover {
-    background-color: #007bff;
-}
-.center-box {
-    display: flex;
-    flex-direction: column;
-    justify-content: center;
-    align-items: center;
-    height: 90vh;
+    margin-top: 12px;
 }
 """) as app:
-    with gr.Column(elem_classes=["center-box"]):
+    with gr.HTML("<div class='full-center'>"):
         gr.HTML("<h2>OptionStrat Flow</h2>")
-        gr.HTML('<a href="https://optionstrat.com/flow" class="button-link">Truy cập Option Flow</a>')
+        gr.HTML("""
+            <a class="button-link" href="https://optionstrat.com/flow" target="_blank">
+                Truy cập Option Flow
+            </a>
+        """)
+        gr.HTML("</div>")
 
 app.launch()