diff --git a/json_to_md.py b/json_to_md.py
index 666bdf84..c294a2e7 100644
--- a/json_to_md.py
+++ b/json_to_md.py
@@ -35,20 +35,17 @@ def extract_param_str_from_nodeid(nodeid):
         return nodeid[first+1:last]
     return None
 
-def get_details_block(summary, body, level=10, params_str=None):
-    padding = 1.5 * level  # en em, plus flexible qu’en px
-    style = f"padding-left: {padding}em;"
-    
+def get_details_block(summary, body, level=4, params_str=None):
+    indent = " " * 4 * level 
+
     if params_str:
         summary += f' <span style="color: #888; font-size: 0.9em;">parameters: [{params_str}]</span>'
 
     return (
-        f'<div style="{style}">\n'
-        f'<details>\n'
-        f'<summary>{summary}</summary>\n\n'
-        f'{body}\n'
-        f'</details>\n'
-        f'</div>\n\n'
+        f"{indent}<details>\n"
+        f"{indent}<summary>{summary}</summary>\n\n"
+        f"{indent}{body}\n"
+        f"{indent}</details>\n\n"
     )