diff --git a/main.typ b/main.typ
index f6b97d3..226465c 100644
--- a/main.typ
+++ b/main.typ
@@ -1,12 +1,77 @@
+#set page(margin: (
+  top: 1cm,
+  bottom: 1cm,
+  right: 1cm,
+  left: 1cm,
+))
 
-= Algorithm costs
+#set text(7pt)
+#show heading: it => {
+  if it.level == 1 {
+    // pagebreak(weak: true)
+    text(10pt, upper(it))
+  } else if it.level == 2 {
+    text(9pt, smallcaps(it)) 
+  } else {
+    text(8pt, smallcaps(it)) 
+  }
+}
 
-= Algorithm overview
 
-= Concurrency protocols
+= Indices
 
-= Log example
+== Bitmap
 
-= B+ tree
+== B+ tree
 
-= Bitmap
+== Hash-index
+
+= Algorithms 
+
+== Costs
+
+=== Nested-loop join
+
+=== Block-nested join
+
+=== Merge join
+
+=== Hash-join
+
+== Overview
+
+= Relational-algebra
+
+== Equivalence rules
+
+== Operations
+
+= Concurrency 
+
+== Conflict-serializability
+
+=== Conflict (types)
+
+=== Serializability graph
+
+== Standard consistency levels
+
+== Protocols
+
+=== Lock-based
+
+=== Timestamp
+
+=== Validation
+
+=== Version isolation
+
+= Logs 
+
+== WAL principle
+
+== Recovery algorithm
+
+== Log type examples
+
+== Recovery example