diff --git a/.env.dist b/.env.dist
index 9419f8d..ae74f5a 100644
--- a/.env.dist
+++ b/.env.dist
@@ -9,7 +9,7 @@
 # Real environment variables win over .env files.
 
 # PROD / DEV
-APP_MODE=PROD
+APP_MODE=DEV
 
 APP_COMPONENTS_FILE=application/config/app.php
 APP_NODES_FILE=application/config/nodes.php
diff --git a/application/config/factories/templateFactory.php b/application/config/factories/templateFactory.php
index d025a55..ca27672 100644
--- a/application/config/factories/templateFactory.php
+++ b/application/config/factories/templateFactory.php
@@ -1,2 +1,2 @@
 <?php
-return (new \Rmphp\Content\Content('/templates/base.tpl'))->setSubtemplatePath('/templates');
\ No newline at end of file
+return (new \Rmphp\Content\Content('/templates/base.tpl0'))->setSubtemplatePath('/templates');
\ No newline at end of file
diff --git a/public/assets/css/style.css b/public/assets/css/style.css
index 41e304e..1624be7 100644
--- a/public/assets/css/style.css
+++ b/public/assets/css/style.css
@@ -15,4 +15,5 @@ body{font-family: Arimo, sans-serif; font-size: 15px; margin: 0; padding: 0;}
     border: 3px solid #FFF;
 }
 
-h1{padding: 0 30px}
\ No newline at end of file
+h1{padding: 0 30px}
+
diff --git a/public/index.php b/public/index.php
index 7a18eaf..6da9507 100644
--- a/public/index.php
+++ b/public/index.php
@@ -19,7 +19,7 @@ $app = new App();
 $response = $app->handler($request, (new Response())->withHeader("Content-Type", "text/html; charset=utf-8"));
 (new ResponseEmitter())->emit($response);
 
-if(($response->getStatusCode() !== 200 && getenv("APP_MODE") != 'PROD') || in_array("Dev", $response->getHeader("App-Mode"))){
+if(($response->getStatusCode() !== 200 && getenv("APP_MODE") == 'DEV') || in_array("Dev", $response->getHeader("App-Mode"))){
 	$app->syslogger()->dump("Response", $response);
 	addShutdownInfo($app->syslogger()->getLogs());
 }
\ No newline at end of file
diff --git a/templates/error/404.tpl b/templates/error/404.tpl
index 6eac0e4..624dda2 100644
--- a/templates/error/404.tpl
+++ b/templates/error/404.tpl
@@ -1,10 +1,38 @@
 <!DOCTYPE html>
-<html lang="en">
+<html lang="ru">
 <head>
-    <meta charset="UTF-8">
-    <title>404</title>
+    <meta charset="utf-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>404 Page Not Found</title>
+    <style>
+        body{
+            font-family: Arimo, sans-serif;
+            font-size: 15px;
+            margin: 0;
+            padding: 0;
+            background: #c9d1e1;
+        }
+        .err-page{
+            display: flex;
+            align-items: center;
+            height: 50vh;
+            flex-direction: column;
+            justify-content: center;
+            color:#888;
+        }
+        .err-page__header{
+            font-size: 70px;
+        }
+        .err-page__text{
+            font-size: 30px;
+        }
+    </style>
 </head>
 <body>
-    <h1>Error 404</h1>
+<div class="err-page">
+    <div class="err-page__header">404</div>
+    <div class="err-page__text">Page Not Found</div>
+</div>
 </body>
 </html>
\ No newline at end of file
diff --git a/templates/error/501.tpl b/templates/error/501.tpl
index 694a0f6..8d76323 100644
--- a/templates/error/501.tpl
+++ b/templates/error/501.tpl
@@ -1,10 +1,38 @@
 <!DOCTYPE html>
-<html lang="en">
+<html lang="ru">
 <head>
-    <meta charset="UTF-8">
-    <title>501</title>
+    <meta charset="utf-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>501 Not Implemented</title>
+    <style>
+        body{
+            font-family: Arimo, sans-serif;
+            font-size: 15px;
+            margin: 0;
+            padding: 0;
+            background: #e1c9d1;
+        }
+        .err-page{
+            display: flex;
+            align-items: center;
+            height: 50vh;
+            flex-direction: column;
+            justify-content: center;
+            color:#888;
+        }
+        .err-page__header{
+            font-size: 70px;
+        }
+        .err-page__text{
+            font-size: 30px;
+        }
+    </style>
 </head>
 <body>
-    <h1>Error 501</h1>
+    <div class="err-page">
+        <div class="err-page__header">501</div>
+        <div class="err-page__text">Not Implemented</div>
+    </div>
 </body>
 </html>
\ No newline at end of file
diff --git a/templates/main/index.tpl b/templates/main/index.tpl
index db397b7..b0149e7 100644
--- a/templates/main/index.tpl
+++ b/templates/main/index.tpl
@@ -1,5 +1,5 @@
 <article>
     <main>
-        <h1>Hello. Now is <?=$this->date?></h1>
+        <h1 style="text-align: center">Hello. Now is <?=$this->date?></h1>
     </main>
 </article>
\ No newline at end of file
