Update app.py

app.py

@@ -177,8 +177,17 @@ def create_pdf_from_markdown_strings(markdown_strings):
     return combined_html
 
 def generate_pdf(html_string):
+    css = """
+    @page {
+        size: A4 landscape;
+        margin: 20cm;
+    }
+    body {
+        font-family: sans-serif;
+    }
+    """
     pdf = BytesIO()
-    HTML(string=html_string).write_pdf(pdf)
+    HTML(string=html_string).write_pdf(pdf, stylesheets=[CSS(string=css)])
     pdf.seek(0)
     return pdf