Fix: Move CSS to launch method for HF Spaces compatibility

app.py

@@ -214,21 +214,23 @@ def submit_viva_answer_logic(ans, qs, idx, name):
         return "### 🎉 VIVA Complete!", "", "", fb, gr.update(interactive=False, value="Done"), next_idx, None
 
 # --- GRADIO UI ---
-with gr.Blocks(title="AnatomyBot", css="""
-    /* HIDE DEFAULT TABS HEADER to use Custom Nav */
-    .tabs > .tab-nav { display: none !important; }
-    
-    #registration_modal {
-        position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%);
-        z-index: 1000; background: white; padding: 2rem; border-radius: 20px;
-        box-shadow: 0 10px 40px rgba(0,0,0,0.3); border: 2px solid #ff6b35; width: 80%; max-width: 600px;
-    }
-    body:has(#registration_modal:not([style*="display: none"]))::after {
-        content: ''; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 999;
-    }
-    #nav_bar { display: flex; gap: 10px; overflow-x: auto; padding-bottom: 5px; }
-    #nav_bar button { flex: 1; white-space: nowrap; }
-""") as demo:
+CSS = """
+/* HIDE DEFAULT TABS HEADER to use Custom Nav */
+.tabs > .tab-nav { display: none !important; }
+
+#registration_modal {
+    position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%);
+    z-index: 1000; background: white; padding: 2rem; border-radius: 20px;
+    box-shadow: 0 10px 40px rgba(0,0,0,0.3); border: 2px solid #ff6b35; width: 80%; max-width: 600px;
+}
+body:has(#registration_modal:not([style*="display: none"]))::after {
+    content: ''; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 999;
+}
+#nav_bar { display: flex; gap: 10px; overflow-x: auto; padding-bottom: 5px; }
+#nav_bar button { flex: 1; white-space: nowrap; }
+"""
+
+with gr.Blocks(title="AnatomyBot") as demo:
     
     # State
     student_name = gr.State("")
@@ -392,4 +394,4 @@ with gr.Blocks(title="AnatomyBot", css="""
     b_refresh.click(lambda: (f"Count: {len(get_all_students())}", get_all_students()), outputs=[adm_stat, tbl])
 
 if __name__ == "__main__":
-    demo.launch(server_name="0.0.0.0", server_port=7860)
+    demo.launch(server_name="0.0.0.0", server_port=7860, css=CSS)