diff --git a/site/app.py b/site/app.py
index 7a8f646..b2dc764 100644
--- a/site/app.py
+++ b/site/app.py
@@ -1,3 +1,4 @@
+import datetime
 import os
 
 import psycopg2
@@ -39,35 +40,70 @@ PAGE = """
 <head>
   <meta charset="utf-8">
   <title>Flask + Postgres Demo</title>
+  <link rel="icon" href="https://nubes.ru/themes/custom/nubes/images/nubes-ico.svg" type="image/svg+xml">
+  <style>
+    :root { --nubes-blue: #005BFF; --nubes-dark: #1A1A1A; --nubes-grey: #F8F9FA; --nubes-border: #E5E7EB; }
+    body { font-family: 'Segoe UI', Tahoma, sans-serif; margin: 0; padding: 0; background: var(--nubes-grey); color: var(--nubes-dark); }
+    .header-bg { position: sticky; top: 0; z-index: 1000; background: #fff; border-bottom: 1px solid var(--nubes-border); padding: 15px 0; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
+    .container { max-width: 1000px; margin: auto; padding: 0 20px; }
+    .header-content { display: flex; align-items: center; justify-content: space-between; }
+    .logo { height: 40px; }
+    .main-content { padding: 40px 0; }
+    .card { background: #fff; padding: 32px; border-radius: 16px; box-shadow: 0 4px 20px rgba(0,0,0,0.04); }
+    .btn { display: inline-flex; align-items: center; justify-content: center; cursor: pointer; padding: 12px 24px; border: none; border-radius: 8px; font-weight: 600; font-size: 14px; }
+    .btn-primary { background: var(--nubes-blue); color: #fff; }
+    .btn-action { padding: 12px; background: #fff; border: 1px solid var(--nubes-border); border-radius: 8px; font-size: 18px; line-height: 1; cursor: pointer; min-width: 44px; }
+    .btn-action:hover { background: var(--nubes-grey); border-color: var(--nubes-blue); }
+    .input-group { display: flex; gap: 12px; margin-bottom: 32px; }
+    input[type="text"] { flex-grow: 1; width: 100%; padding: 12px 16px; border: 1px solid var(--nubes-border); border-radius: 8px; font-size: 14px; }
+    table { width: 100%; border-collapse: collapse; }
+    th { text-align: left; padding: 16px; font-size: 12px; text-transform: uppercase; color: #6B7280; border-bottom: 1px solid var(--nubes-border); }
+    td { padding: 16px; border-bottom: 1px solid var(--nubes-border); }
+    tbody tr:nth-child(even) { background-color: #FAFBFC; }
+    tbody tr:hover { background-color: #F3F4F6; }
+    .id-cell { font-family: monospace; color: #9CA3AF; width: 60px; }
+    .actions-cell { display: flex; gap: 12px; width: 130px; }
+  </style>
 </head>
 <body>
-  <h3>Flask + Postgres Demo</h3>
-  {% if error %}<p style="color:red">{{ error }}</p>{% endif %}
-  <form method="post">
-    <input type="text" name="txt_content" placeholder="Новое сообщение...">
-    <button type="submit">Добавить</button>
-  </form>
-  <table border="1" cellpadding="6" cellspacing="0">
-    <tr><th>ID</th><th>Содержимое</th><th>Действия</th></tr>
-    {% for row in rows %}
-    <tr>
-      <td>{{ row[0] }}</td>
-      <td>
-        <form method="post" action="/update">
-          <input type="hidden" name="id" value="{{ row[0] }}">
-          <input type="text" name="txt_content" value="{{ row[1] }}">
-          <button type="submit">💾</button>
-        </form>
-      </td>
-      <td>
-        <form method="post" action="/delete" onsubmit="return confirm('Удалить?')">
-          <input type="hidden" name="id" value="{{ row[0] }}">
-          <button type="submit">🗑</button>
-        </form>
-      </td>
-    </tr>
-    {% endfor %}
-  </table>
+  <div class="header-bg">
+    <div class="container header-content">
+      <img src="https://nubes.ru/themes/custom/nubes_2025/logo.svg" alt="Nubes" class="logo">
+      <div style="font-size: 14px; color: var(--nubes-blue); font-weight: 600;">Flask + Postgres Demo</div>
+    </div>
+  </div>
+  <div class="container main-content">
+    <div class="card">
+      {% if error %}<p style="color:red">{{ error }}</p>{% endif %}
+      <form method="post" class="input-group" onsubmit="const btn=this.querySelector('button'); if(btn){btn.disabled=true; btn.textContent='Добавляем...';}">
+        <input type="text" name="txt_content" placeholder="Новое сообщение..." required>
+        <button type="submit" class="btn btn-primary">Добавить</button>
+      </form>
+      <table>
+        <thead><tr><th>ID</th><th>Содержимое</th><th>Действия</th></tr></thead>
+        <tbody>
+        {% for row in rows %}
+        <tr>
+          <td class="id-cell">{{ row[0] }}</td>
+          <td>
+            <form method="post" action="/update" id="upd_{{ row[0] }}" style="margin:0">
+              <input type="hidden" name="id" value="{{ row[0] }}">
+              <input type="text" name="txt_content" value="{{ row[1] }}" style="width:100%; border:none; background:transparent;">
+            </form>
+          </td>
+          <td class="actions-cell">
+            <button type="submit" form="upd_{{ row[0] }}" class="btn-action">💾</button>
+            <form method="post" action="/delete" style="margin:0" onsubmit="return confirm('Удалить?')">
+              <input type="hidden" name="id" value="{{ row[0] }}">
+              <button type="submit" class="btn-action">🗑</button>
+            </form>
+          </td>
+        </tr>
+        {% endfor %}
+        </tbody>
+      </table>
+    </div>
+  </div>
 </body>
 </html>
 """
@@ -81,10 +117,28 @@ def index():
         content = request.form.get("txt_content") or "Это Flask сделал"
         try:
             with get_conn() as conn, conn.cursor() as cur:
-                cur.execute(
-                    "INSERT INTO nubes_test_table (test_data) VALUES (%s)",
-                    (content,),
-                )
+            cur.execute(
+              "SELECT test_data, created_at FROM nubes_test_table ORDER BY id DESC LIMIT 1"
+            )
+            last = cur.fetchone()
+            is_duplicate = False
+            if last:
+              last_text, last_created = last
+              now = (
+                datetime.datetime.now(last_created.tzinfo)
+                if isinstance(last_created, datetime.datetime)
+                else datetime.datetime.utcnow()
+              )
+              is_duplicate = (
+                last_text == content
+                and (now - last_created).total_seconds() < 3
+              )
+
+            if not is_duplicate:
+              cur.execute(
+                "INSERT INTO nubes_test_table (test_data) VALUES (%s)",
+                (content,),
+              )
             return redirect("/")
         except Exception as exc:
             error = str(exc)
