diff --git a/index.html b/index.html
index a04e0d1..66ea2c4 100644
--- a/index.html
+++ b/index.html
@@ -8,7 +8,7 @@
 <link rel="alternate" type="application/atom+xml" href="http://hg.diveintopython3.org/atom-log">
 <style type="text/css">
 body{counter-reset:h1 -1}
-h1{background:papayawhip;display:block}
+h1:before{counter-increment:h1}
 h2{margin-left:1.75em}
 h3{margin-left:3.5em}
 .appendix h1:before{content:""}