diff --git a/www/data/css/styles.css b/www/data/css/styles.css
index 4a06e09..10726a5 100644
--- a/www/data/css/styles.css
+++ b/www/data/css/styles.css
@@ -25,6 +25,9 @@ body {
 @media (min-width: 1200px) {
   .content-responsive {
     width: 1170px; } }
+.content-fullheight {
+  flex-grow: 1; }
+
 .contentheader {
   width: 100%;
   color: #333;
@@ -134,6 +137,8 @@ html, body {
   height: 100%; }
 
 #mastercontainer {
+  display: flex;
+  flex-direction: column;
   min-height: 100%;
   position: relative; }
 
@@ -448,6 +453,27 @@ html, body {
 
   .bce_pag05 {
     flex-direction: row; } }
+.ev_master {
+  align-self: center; }
+  @media (min-width: 850px) {
+    .ev_master {
+      padding-bottom: 80px; } }
+  .ev_master .ev_code {
+    color: #000;
+    text-align: center;
+    font-size: 150pt;
+    font-weight: 500;
+    font-family: Consolas, Monaco, "Courier New", Menlo, monospace; }
+  .ev_master .ev_msg {
+    color: #888;
+    text-align: center;
+    font-size: 25pt; }
+  @media (max-width: 767px) {
+    .ev_master .ev_code {
+      font-size: 75pt; }
+    .ev_master .ev_msg {
+      font-size: 15pt; } }
+
 .euler_pnl_base {
   display: inline-flex;
   flex-direction: column;
diff --git a/www/data/css/styles.scss b/www/data/css/styles.scss
index d5c6b05..3ddb832 100644
--- a/www/data/css/styles.scss
+++ b/www/data/css/styles.scss
@@ -6,6 +6,7 @@
 @import 'styles_bloglist';
 @import 'styles_blogview';
 @import 'styles_blogview_befunge';
+@import 'styles_errorview';
 
 @import 'styles_eulerpanel';
 @import 'styles_bfjoustrunner';
diff --git a/www/data/css/styles_errorview.scss b/www/data/css/styles_errorview.scss
new file mode 100644
index 0000000..e5eb586
--- /dev/null
+++ b/www/data/css/styles_errorview.scss
@@ -0,0 +1,28 @@
+@import 'styles_config';
+
+.ev_master {
+
+  align-self: center;
+
+  @media(min-width:850px) {padding-bottom: 80px;}
+
+  .ev_code {
+    color: #000;
+    text-align: center;
+    font-size: 150pt;
+    font-weight: 500;
+    font-family: $FONT_CODE;
+  }
+
+  .ev_msg {
+    color: #888;
+    text-align: center;
+    font-size: 25pt;
+  }
+
+  @media(max-width:767px) {
+    .ev_code {  font-size: 75pt; }
+    .ev_msg { font-size: 15pt; }
+  }
+
+}
\ No newline at end of file
diff --git a/www/data/css/styles_footer.scss b/www/data/css/styles_footer.scss
index b76d6b6..a1e0b37 100644
--- a/www/data/css/styles_footer.scss
+++ b/www/data/css/styles_footer.scss
@@ -9,6 +9,8 @@ html, body {
 // https://stackoverflow.com/a/19723677/1761622
 
 #mastercontainer {
+  display:flex;
+  flex-direction: column;
   min-height:100%;
   position:relative;
 }
@@ -18,6 +20,7 @@ html, body {
 #content {
   padding-bottom:60px;   /* Height of the footer */
 }
+
 #footerdiv {
   position:absolute;
   bottom:0;
diff --git a/www/data/css/styles_global.scss b/www/data/css/styles_global.scss
index 989764c..ca3f7b8 100644
--- a/www/data/css/styles_global.scss
+++ b/www/data/css/styles_global.scss
@@ -24,6 +24,8 @@ body {
 @media(min-width:992px) { .content-responsive { width: 724px; } }
 @media(min-width:1200px){ .content-responsive { width: 1170px; } }
 
+.content-fullheight { flex-grow: 1;}
+
 .contentheader {
   width: 100%;
   color: $COL_TEXT_DARK;
diff --git a/www/fragments/blogview_euler_single.php b/www/fragments/blogview_euler_single.php
index 2cafa19..0b30eed 100644
--- a/www/fragments/blogview_euler_single.php
+++ b/www/fragments/blogview_euler_single.php
@@ -9,7 +9,7 @@ $subview = $OPTIONS['subview'];
 $euler   = Euler::listAll();
 $problem = Euler::getEulerProblemFromStrIdent($subview);
 
-if ($post === NULL) httpError(404, 'problem not found');
+if ($problem === NULL) httpError(404, 'Project Euler entry not found');
 
 $pd = new ParsedownCustom();
 
diff --git a/www/index.php b/www/index.php
index 54b40e5..2b8be96 100644
--- a/www/index.php
+++ b/www/index.php
@@ -70,73 +70,89 @@ $URL_RULES =
 
 //#############################################################################
 
-$path      = strtolower(parse_url($_SERVER['REQUEST_URI'])['path']);
-$pathparts = preg_split('@/@', $path, NULL, PREG_SPLIT_NO_EMPTY);
-$partcount = count($pathparts);
+try {
+	InitPHP();
 
-global $OPTIONS;
-global $HEADER_ACTIVE;
+	$path      = strtolower(parse_url($_SERVER['REQUEST_URI'])['path']);
+	$pathparts = preg_split('@/@', $path, NULL, PREG_SPLIT_NO_EMPTY);
+	$partcount = count($pathparts);
 
-$HEADER_ACTIVE = 'none';
+	global $OPTIONS;
+	global $HEADER_ACTIVE;
 
-foreach ($URL_RULES as $rule)
-{
-	if ($partcount !== count($rule['url'])) continue;
-	
-	$urlparams = [];
-	
-	$match = true;
-	for($i = 0; $i < $partcount; $i++)
+	$HEADER_ACTIVE = 'none';
+
+	foreach ($URL_RULES as $rule)
 	{
-		$comp = $rule['url'][$i];
-		if (startsWith($comp, '?{') && endsWith($comp, '}'))
-		{
-			$ident = substr($comp, 2, strlen($comp)-3);
-			$urlparams[$ident] = $pathparts[$i];
-		}
-		else
-		{
-			if (strtolower($comp) !== strtolower($pathparts[$i])) { $match = false; break; }
-		}
-	}
-	if (!$match) continue;
-	
-	$opt = [];
-	foreach($rule['options'] as $optname => $optvalue)
-	{
-		$value = $optvalue;
-		
-		if ($value === '%GET%')
-		{
-			if (!isset($_GET[$optname])) { $match = false; break; }
-			$value = $_GET[$optname];
-		}
-		else if ($value === '%POST%')
-		{
-			if (!isset($_POST[$optname])) { $match = false; break; }
-			$value = $_POST[$optname];
-		}
-		else if ($value === '%URL%')
-		{
-			if (!isset($urlparams[$optname])) { $match = false; break; }
-			$value = $urlparams[$optname];
-		}
-		
-		$opt[strtolower($optname)] = $value;
-	}
-	if (!$match) continue;
-	
-	$OPTIONS = $opt;
-	include $rule['target'];
-	return;
-	
-}
+		if ($partcount !== count($rule['url'])) continue;
+
+		$urlparams = [];
+
+		$match = true;
+		for($i = 0; $i < $partcount; $i++)
+		{
+			$comp = $rule['url'][$i];
+			if (startsWith($comp, '?{') && endsWith($comp, '}'))
+			{
+				$ident = substr($comp, 2, strlen($comp)-3);
+				$urlparams[$ident] = $pathparts[$i];
+			}
+			else
+			{
+				if (strtolower($comp) !== strtolower($pathparts[$i])) { $match = false; break; }
+			}
+		}
+		if (!$match) continue;
+
+		$opt = [];
+		foreach($rule['options'] as $optname => $optvalue)
+		{
+			$value = $optvalue;
+
+			if ($value === '%GET%')
+			{
+				if (!isset($_GET[$optname])) { $match = false; break; }
+				$value = $_GET[$optname];
+			}
+			else if ($value === '%POST%')
+			{
+				if (!isset($_POST[$optname])) { $match = false; break; }
+				$value = $_POST[$optname];
+			}
+			else if ($value === '%URL%')
+			{
+				if (!isset($urlparams[$optname])) { $match = false; break; }
+				$value = $urlparams[$optname];
+			}
+
+			$opt[strtolower($optname)] = $value;
+		}
+		if (!$match) continue;
+
+		$OPTIONS = $opt;
+		include $rule['target'];
+		return;
+
+	}
+
+	{
+		// [404] - Page Not Found
+		$OPTIONS = [];
+		httpError('404', 'Page not found');
+		return;
+	}
+
+} catch (Exception $e) {
+
+	if (isProd())
+	{
+		httpError('500 ', 'Internal server error');
+	}
+	else
+	{
+		echo '<table class="xdebug-error xe-uncaught-exception" dir="ltr" border="1" cellspacing="0" cellpadding="1">'.$e->xdebug_message.'</table>';
+	}
 
-{
-	// [404] - Page Not Found
-	$OPTIONS = [];
-	include 'pages/error_404.php';
-	return;
 }
 
 
diff --git a/www/internals/base.php b/www/internals/base.php
index 9199ad7..c68f6b3 100644
--- a/www/internals/base.php
+++ b/www/internals/base.php
@@ -3,11 +3,28 @@
 global $CONFIG;
 $CONFIG = require 'config.php';
 
-$CSS_BASE = ($CONFIG['prod']) ? ('styles.min.css') : ('styles.css');
+global $CSS_BASE;
+$CSS_BASE = ($CONFIG['prod']) ? ('/data/css/styles.min.css') : ('/data/css/styles.css');
 
 global $REGISTERED_SCRIPTS;
 $REGISTERED_SCRIPTS = [];
 
+function InitPHP() {
+
+	set_error_handler("exception_error_handler"); // errors as exceptions for global catch
+
+	ob_start(); // buffer outpt so it can be discarded in httpError
+
+}
+
+function exception_error_handler($severity, $message, $file, $line) {
+	if (!(error_reporting() & $severity)) {
+		// This error code is not included in error_reporting
+		return;
+	}
+	throw new ErrorException($message, 0, $severity, $file, $line);
+}
+
 function startsWith($haystack, $needle)
 {
 	$length = strlen($needle);
@@ -22,7 +39,12 @@ function endsWith($haystack, $needle)
 
 function httpError($errorcode, $message)
 {
-	die($message);//TODO errorcode
+	ob_clean();
+
+	global $OPTIONS;
+	$OPTIONS = [ 'code' => $errorcode, 'message' => $message ];
+	require (__DIR__ . '/../pages/errorview.php');
+	die();
 }
 
 function destructiveUrlEncode($str) {
@@ -81,4 +103,14 @@ function includeScriptOnce($script, $echo = true)
 		$REGISTERED_SCRIPTS []= $script;
 		return "<script src=\"$script\" type=\"text/javascript\"></script>";
 	}
+}
+
+function printCSS() {
+	global $CSS_BASE;
+	echo   '<link rel="stylesheet" href="' . $CSS_BASE . '"/>';
+}
+
+function isProd() {
+	global $CONFIG;
+	return $CONFIG['prod'];
 }
\ No newline at end of file
diff --git a/www/pages/blog_list.php b/www/pages/blog_list.php
index 32dbd77..4ceada8 100644
--- a/www/pages/blog_list.php
+++ b/www/pages/blog_list.php
@@ -12,7 +12,7 @@ $allposts = Blog::listAllOrderedDescending();
 	<title>Mikescher.com - Blog</title>
 	<meta name="google-site-verification" content="pZOhmjeJcQbRMNa8xRLam4dwJ2oYwMwISY1lRKreSSs"/>
 	<link rel="icon" type="image/png" href="/data/images/favicon.png"/>
-	<link rel="stylesheet" href="/data/css/styles.css"/>
+	<link rel="stylesheet" href="<?php printCSS(); ?>"/>
 </head>
 <body>
 <div id="mastercontainer">
diff --git a/www/pages/blog_view.php b/www/pages/blog_view.php
index 52b60b2..946b69d 100644
--- a/www/pages/blog_view.php
+++ b/www/pages/blog_view.php
@@ -10,7 +10,7 @@ $subview = $OPTIONS['subview'];
 
 $post = Blog::getBlogpost($id);
 
-if ($post === NULL) httpError(404, 'blogpost not found');
+if ($post === NULL) httpError(404, 'Blogpost not found');
 
 ?>
 <head>
@@ -18,7 +18,7 @@ if ($post === NULL) httpError(404, 'blogpost not found');
 	<title>Mikescher.com - Blog</title>
 	<meta name="google-site-verification" content="pZOhmjeJcQbRMNa8xRLam4dwJ2oYwMwISY1lRKreSSs"/>
 	<link rel="icon" type="image/png" href="/data/images/favicon.png"/>
-    <link rel="stylesheet" href="/data/css/styles.css"/>
+	<?php printCSS(); ?>
 	<?php
     if ($post['type'] === 'euler' && $subview !== '')
 	{
diff --git a/www/pages/errorview.php b/www/pages/errorview.php
new file mode 100644
index 0000000..e120a48
--- /dev/null
+++ b/www/pages/errorview.php
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html lang="en">
+<?php
+    require_once (__DIR__ . '/../internals/base.php');
+    global $OPTIONS;
+
+    $errorcode = $OPTIONS['code'];
+    $errormsg  = $OPTIONS['message'];
+?>
+<head>
+	<meta charset="utf-8">
+	<title>Mikescher.com - <?php echo $errormsg; ?></title>
+	<link rel="icon" type="image/png" href="/data/images/favicon.png"/>
+    <?php printCSS(); ?>
+</head>
+<body>
+<div id="mastercontainer">
+
+	<?php $HEADER_ACTIVE='none'; include (__DIR__ . '/../fragments/header.php');  ?>
+
+<div id="content" class="content-responsive content-fullheight">
+
+    <div class="ev_master">
+        <div class="ev_code"><?php echo $errorcode; ?></div>
+        <div class="ev_msg"><?php echo $errormsg; ?></div>
+    </div>
+
+</div>
+
+</div>
+</body>
+</html>
\ No newline at end of file
diff --git a/www/pages/main.php b/www/pages/main.php
index 88b26df..6e29333 100644
--- a/www/pages/main.php
+++ b/www/pages/main.php
@@ -6,7 +6,7 @@
 	<title>Mikescher.com</title>
 	<meta name="google-site-verification" content="pZOhmjeJcQbRMNa8xRLam4dwJ2oYwMwISY1lRKreSSs"/>
 	<link rel="icon" type="image/png" href="/data/images/favicon.png"/>
-	<link rel="stylesheet" href="/data/css/styles.css"/>
+	<?php printCSS(); ?>
 </head>
 <body>
 <div id="mastercontainer">