Update app.py

app.py

@@ -299,7 +299,7 @@ with gr.Blocks(theme=simple_theme, title=APP_TITLE) as interface:
         run_btn = gr.Button("🚀 Run Validation", variant="primary", scale=1)
 
     with gr.Row():
-        with gr.Column(scale=1):
+        with gr.Column(scale=2):
             pdf_preview = gr.HTML(label="📑 PDF Preview", value="<p>Upload a PDF to preview</p>")
         with gr.Column(scale=2):
             output_md = gr.Markdown(