diff --git a/json_to_md.py b/json_to_md.py
index 68515cf0..36005c10 100644
--- a/json_to_md.py
+++ b/json_to_md.py
@@ -61,18 +61,18 @@ def normalize_nodeid(nodeid):
     return None
 
 def get_details_block(summary, body, level=0, params_str=None):
-    margin = 10 * level  # Réduction de l’indentation visuelle
-    border = f"border-left: 2px solid #ccc;" if level > 0 else ""
-    
+    prefix = "▶️ " * level  # simulate visual depth
+    indent = "  " * level   # optional: indent inside details
+
     if params_str:
-        summary += f" <span style='color: #999; font-size: 0.85em;'>params: [{params_str}]</span>"
-    
-    return (f'<div style="margin-left: {margin}px; {border}; padding-left: 8px;">\n'
-            f'<details>\n'
-            f'<summary style="background-color: #f9f9f9; padding: 4px; border-radius: 4px;">{summary}</summary>\n\n'
-            f'{body}\n'
-            f'</details>\n'
-            f'</div>\n\n')
+        summary += f" _(params: {params_str})_"
+
+    return (
+        f"{indent}<details>\n"
+        f"{indent}<summary>{prefix}{summary}</summary>\n\n"
+        f"{indent}{body}\n"
+        f"{indent}</details>\n\n"
+    )
 
 
 def make_test_block(test, status, emoji, level, runtime_params):