diff --git a/doc/architecture/overall_pipeline.md b/doc/architecture/overall_pipeline.md
index d081745..28539f8 100644
--- a/doc/architecture/overall_pipeline.md
+++ b/doc/architecture/overall_pipeline.md
@@ -129,7 +129,7 @@ This allows units to be chained in arbitrary order as long as their precondition
 ### Local, topology-aware access
 The half-edge structure encodes vertices, halfedges, faces, and their adjacency relations, which is essential for typical geometry operations (e.g. local neighborhood queries, traversal, edge flips).
 
-### Algorithms do not need to know where the mesh came from (file vs. analytic vs. procedural); they only rely on this uniform interface.
+Algorithms do not need to know where the mesh came from (file vs. analytic vs. procedural); they only rely on this uniform interface.
 
 ### Extensibility via attributes
 The universal mesh may carry extensible per-vertex, per-edge, and per-face attributes (e.g. UVs, curvature, experimental scalar fields).