diff --git a/impressjs/berlin/index.html b/impressjs/berlin/index.html
index 7d14fd0..d78e436 100644
--- a/impressjs/berlin/index.html
+++ b/impressjs/berlin/index.html
@@ -3,9 +3,63 @@
 <head>
     <meta charset="utf-urlencoded" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests" />
     <title>Berlin Presentation</title>
     <link href="https://yandex.st/highlightjs/8.0/styles/default.min.css" rel="stylesheet" />
     <link href="style.css" rel="stylesheet" />
+    <style>
+        body {
+            background-color: white;
+            font-family: Arial, sans-serif;
+            color: black;
+            margin: 0;
+            padding: 0;
+        }
+
+        .step {
+            width: 600px; 
+            border-radius: 10px;
+            padding: 40px;
+            /* box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.3);
+            background-color: #FFFFF0; */
+            color: #333;
+            text-align: center;
+            opacity: 10%;
+            transition: opacity 1s;
+        }
+
+        .step img {
+            opacity: 0%;
+            transition: opacity 1s;
+        }
+
+        .active {
+            opacity: 100%;
+            transition: opacity 1s;
+        }
+
+        .active img {
+            opacity: 100%;
+            transition: opacity 1s;
+        }
+
+        h1 {
+            font-size: 2.5em;
+            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
+        }
+
+        p {
+            font-size: 1.2em;
+            line-height: 1.4;
+            margin: 20px 0;
+        }
+
+        img {
+            width: 80%;
+            height: auto;
+            margin-top: 20px;
+        }
+    </style>
 </head>
 
 <body>
