Index: public/500.html
===================================================================
--- public/500.html	(revision 1330)
+++ public/500.html	(revision 1331)
@@ -1,20 +1,9 @@
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
-   "http://www.w3.org/TR/html4/loose.dtd">
+<!DOCTYPE html>
 <html>
-<title>Redmine 500 error</title>
-<style>
-body{
-font-family: Trebuchet MS,Georgia,"Times New Roman",serif;
-color:#303030;
-margin:10px;
-}
-h1{
-font-size:1.5em;
-}
-p{
-font-size:0.8em;
-}
-</style>
+<head>
+  <link href="/stylesheets/error_pages.css" rel="stylesheet" type="text/css" />
+  <title>Redmine 500 error</title>
+</head>
 <body>
   <h1>Internal error</h1>
   <p>An error occurred on the page you were trying to access.<br />
Index: public/404.html
===================================================================
--- public/404.html	(revision 1330)
+++ public/404.html	(revision 1331)
@@ -1,20 +1,9 @@
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
-   "http://www.w3.org/TR/html4/loose.dtd">
+<!DOCTYPE html>
 <html>
-<title>Redmine 404 error</title>
-<style>
-body{
-font-family: Trebuchet MS,Georgia,"Times New Roman",serif;
-color:#303030;
-margin:10px;
-}
-h1{
-font-size:1.5em;
-}
-p{
-font-size:0.8em;
-}
-</style>
+<head>
+  <link href="/stylesheets/error_pages.css" rel="stylesheet" type="text/css" />
+  <title>Redmine 404 error</title>
+</head>
 <body>
   <h1>Page not found</h1>
   <p>The page you were trying to access doesn't exist or has been removed.</p>
Index: public/stylesheets/error_pages.css
===================================================================
--- public/stylesheets/error_pages.css	(revision 0)
+++ public/stylesheets/error_pages.css	(revision 1331)
@@ -0,0 +1,11 @@
+body{
+  font-family: Trebuchet MS, Georgia, "Times New Roman", serif;
+  color: #303030;
+  margin: 10px;
+}
+h1{
+  font-size:1.5em;
+}
+p{
+  font-size:0.8em;
+}
