diff --git a/Doc/html/style.css b/Doc/html/style.css
index 0ae3cb7..afb1855 100644
--- a/Doc/html/style.css
+++ b/Doc/html/style.css
@@ -29,8 +29,9 @@
 
 h1, h2, h3, h4, h5, h6	{ font-family: avantgarde, sans-serif;
 			  font-weight: bold }
-h1, h2			{ font-size: x-large }
-h3, h4			{ font-size: large }
+h1			{ font-size: 180% }
+h2			{ font-size: 150% }
+h3, h4			{ font-size: 120% }
 code, tt		{ font-family: courier }
 var			{ font: italic normal serif }