The markup has been optimized to use more semantic <p> and <code> elements. In addition, the error page for HTTP status code 502 has been added.

20 files changed, 27 insertions, 20 deletions

diff --git a/customization/errorpage/400.shtml b/customization/errorpage/400.shtml
index 90e2e15..9fd5525 100644
--- a/customization/errorpage/400.shtml
+++ b/customization/errorpage/400.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Bad Request" -->
 
 <!--#include file="header.shtml" -->
-	<div>Your browser (or proxy) sent a request that this server could not understand.</div>
+	<p>Your browser (or proxy) sent a request that this server could not understand.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/401.shtml b/customization/errorpage/401.shtml
index d6cfe68..491cacd 100644
--- a/customization/errorpage/401.shtml
+++ b/customization/errorpage/401.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Unauthorized" -->
 
 <!--#include file="header.shtml" -->
-	<div>This server could not verify that you are authorized to access this resource.</div>
+	<p>This server could not verify that you are authorized to access this resource.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/403.shtml b/customization/errorpage/403.shtml
index fb59017..4f9e0c7 100644
--- a/customization/errorpage/403.shtml
+++ b/customization/errorpage/403.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Forbidden" -->
 
 <!--#include file="header.shtml" -->
-	<div>You don't have permission to access the requested resource.</div>
+	<p>You don't have permission to access the requested resource.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/404.shtml b/customization/errorpage/404.shtml
index 714e4e0..a82707e 100644
--- a/customization/errorpage/404.shtml
+++ b/customization/errorpage/404.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Not Found" -->
 
 <!--#include file="header.shtml" -->
-	<div>The requested resource was not found on this server.</div>
+	<p>The requested resource was not found on this server.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/405.shtml b/customization/errorpage/405.shtml
index 2e699cc..32ca2a2 100644
--- a/customization/errorpage/405.shtml
+++ b/customization/errorpage/405.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Method Not Allowed" -->
 
 <!--#include file="header.shtml" -->
-	<div>The request method, with which the server has been requested is not allowed.</div>
+	<p>The request method, with which the server has been requested is not allowed.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/408.shtml b/customization/errorpage/408.shtml
index 09ed971..4398985 100644
--- a/customization/errorpage/408.shtml
+++ b/customization/errorpage/408.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Request Timeout" -->
 
 <!--#include file="header.shtml" -->
-	<div>The server closed the network connection because the client didn't finish the request within the specified time.</div>
+	<p>The server closed the network connection because the client didn't finish the request within the specified time.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/409.shtml b/customization/errorpage/409.shtml
index c59360c..ef4424e 100644
--- a/customization/errorpage/409.shtml
+++ b/customization/errorpage/409.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Conflict" -->
 
 <!--#include file="header.shtml" -->
-	<div>The request could not be completed due to a conflict with the current state of the resource.</div>
+	<p>The request could not be completed due to a conflict with the current state of the resource.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/410.shtml b/customization/errorpage/410.shtml
index ac56756..7340b9b 100644
--- a/customization/errorpage/410.shtml
+++ b/customization/errorpage/410.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Gone" -->
 
 <!--#include file="header.shtml" -->
-	<div>The requested resource is no longer available on this server and there is no forwarding address.</div>
+	<p>The requested resource is no longer available on this server and there is no forwarding address.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/411.shtml b/customization/errorpage/411.shtml
index 253c59e..eb9bb63 100644
--- a/customization/errorpage/411.shtml
+++ b/customization/errorpage/411.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Length Required" -->
 
 <!--#include file="header.shtml" -->
-	<div>The request method, with which the server has been requested requires a valid <code>Content-Length</code> header.</div>
+	<p>The request method, with which the server has been requested requires a valid <code>Content-Length</code> header.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/412.shtml b/customization/errorpage/412.shtml
index ac3cf35..7d27c06 100644
--- a/customization/errorpage/412.shtml
+++ b/customization/errorpage/412.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Precondition Failed" -->
 
 <!--#include file="header.shtml" -->
-	<div>The precondition on the request for the URL failed positive evaluation.</div>
+	<p>The precondition on the request for the URL failed positive evaluation.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/413.shtml b/customization/errorpage/413.shtml
index 4814ee4..66ffb98 100644
--- a/customization/errorpage/413.shtml
+++ b/customization/errorpage/413.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Payload Too Large" -->
 
 <!--#include file="header.shtml" -->
-	<div>The request method, with which the server has been requested does not allow the data transmitted, or the data volume exceeds the capacity limit.</div>
+	<p>The request method, with which the server has been requested does not allow the data transmitted, or the data volume exceeds the capacity limit.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/414.shtml b/customization/errorpage/414.shtml
index f3ad112..40f0535 100644
--- a/customization/errorpage/414.shtml
+++ b/customization/errorpage/414.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Request-URI Too Large" -->
 
 <!--#include file="header.shtml" -->
-	<div>The length of the requested URL exceeds the capacity limit for this server. The request cannot be processed.</div>
+	<p>The length of the requested URL exceeds the capacity limit for this server. The request cannot be processed.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/415.shtml b/customization/errorpage/415.shtml
index 939ff24..bd5c507 100644
--- a/customization/errorpage/415.shtml
+++ b/customization/errorpage/415.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Unsupported Media Type" -->
 
 <!--#include file="header.shtml" -->
-	<div>The server does not support the media type transmitted in the request.</div>
+	<p>The server does not support the media type transmitted in the request.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/429.shtml b/customization/errorpage/429.shtml
index cc2b31f..c1f39fb 100644
--- a/customization/errorpage/429.shtml
+++ b/customization/errorpage/429.shtml
@@ -2,6 +2,6 @@
 <!--#set var="ERRORPAGE_TEXT" value="Too Many Requests" -->
 
 <!--#include file="header.shtml" -->
-	<div>The server has detected an unusually high number of requests from your network address <strong><span><!--#echo var="REMOTE_ADDR" --></span></strong>
-	 and will not process further requests until the flooding has subsided.</div>
+	<p>The server has detected an unusually high number of requests coming from your network (<code><!--#echo var="REMOTE_ADDR" --></code>)
+	 and will not process further requests until the flooding has subsided.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/500.shtml b/customization/errorpage/500.shtml
index 6214974..be108ce 100644
--- a/customization/errorpage/500.shtml
+++ b/customization/errorpage/500.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Internal Server Error" -->
 
 <!--#include file="header.shtml" -->
-	<div>The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there was an error in a CGI script.</div>
+	<p>The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there was an error in a CGI script.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/501.shtml b/customization/errorpage/501.shtml
index 3760c9f..e2987b1 100644
--- a/customization/errorpage/501.shtml
+++ b/customization/errorpage/501.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Not Implemented" -->
 
 <!--#include file="header.shtml" -->
-	<div>The server does not support the action requested by the client.</div>
+	<p>The server does not support the action requested by the client.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/502.shtml b/customization/errorpage/502.shtml
new file mode 100644
index 0000000..6629e18
--- /dev/null
+++ b/customization/errorpage/502.shtml
@@ -0,0 +1,7 @@
+<!--#set var="ERRORPAGE_CODE" value="502" -->
+<!--#set var="ERRORPAGE_TEXT" value="Bad Gateway" -->
+
+<!--#include file="header.shtml" -->
+		<p>The server was acting as a gateway or proxy and received an invalid response from the upstream server (or
+		the upstream server is currently unavailable due to maintenance downtime or capacity problems).</p>
+<!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/503.shtml b/customization/errorpage/503.shtml
index 67e6861..4d3c807 100644
--- a/customization/errorpage/503.shtml
+++ b/customization/errorpage/503.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Service Unavailable" -->
 
 <!--#include file="header.shtml" -->
-	<div>The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.</div>
+	<p>The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/504.shtml b/customization/errorpage/504.shtml
index 1764e5d..03cf20f 100644
--- a/customization/errorpage/504.shtml
+++ b/customization/errorpage/504.shtml
@@ -2,5 +2,5 @@
 <!--#set var="ERRORPAGE_TEXT" value="Gateway Timeout" -->
 
 <!--#include file="header.shtml" -->
-	<div>The gateway did not receive a timely response from the upstream server or application.</div>
+	<p>The gateway did not receive a timely response from the upstream server or application.</p>
 <!--#include file="footer.shtml" -->
\ No newline at end of file
diff --git a/customization/errorpage/header.shtml b/customization/errorpage/header.shtml
index 0c0a526..ac22303 100644
--- a/customization/errorpage/header.shtml
+++ b/customization/errorpage/header.shtml
@@ -14,7 +14,7 @@
 		/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
 		html{margin:0;padding:0;height:100%;box-sizing:border-box;font-size:1.25rem;font-family:'Share Tech Mono',sans-serif;color:#333;background:#EEE;}
 		body{margin:0;padding:0;height:100%;box-sizing:border-box;font-size:1.00rem;line-height:1.20rem;display:flex;text-align:center;}
-		main{margin:auto;max-width:40rem;}div{font-size:0.8rem;color:#0060A0;}span{color:#C45C66;}
+		main{margin:auto;max-width:30rem;}p{margin:0;font-size:0.8rem;color:#0060A0;}code{color:#C45C66;font-weight:bold;}
 
 		/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
 		/* Responsive