diff --git a/installer/templates/nginx.go b/installer/templates/nginx.go
index 3dc35c260..8c3ee2a55 100644
--- a/installer/templates/nginx.go
+++ b/installer/templates/nginx.go
@@ -8,97 +8,123 @@ func NginxCustomBadGateway(brandName, logoSrc string) string {
 }
 
 const nginxCustomBadGatewayTmpl string = `<!DOCTYPE html>
- <html lang="es">
- <head>
-   <meta charset="UTF-8">
-   <title>%s - Maintenance</title>
-   <meta name="viewport" content="width=device-width, initial-scale=1.0">
-   <style>
-     @import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');
- 
-     * {
-       margin: 0;
-       padding: 0;
-       box-sizing: border-box;
-     }
- 
-     body {
-       font-family: 'Roboto', sans-serif;
-       background: url("https://storage.googleapis.com/utmstack-updates/nginx/login-background.jpg") no-repeat center center fixed;
-       background-size: cover;
-       color: #333;
-       display: flex;
-       justify-content: center;
-       align-items: center;
-       min-height: 100vh;
-       text-align: center;
-       padding: 20px;
-     }
- 
-     .container {
-       max-width: 600px;
-       background-color: white;
-       padding: 40px;
-       border-radius: 15px;
-       backdrop-filter: blur(10px);
-       box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
-       animation: fadeIn 1.5s ease-out;
-     }
-     
-     .icon img {
-       width: 80px;
-       max-width: 100%;
-       height: auto;
-       object-fit: contain;
-     }
- 
-     h1 {
-       font-size: 48px;
-       margin-bottom: 20px;
-     }
- 
-     p {
-       font-size: 20px;
-       line-height: 1.5;
-       margin-bottom: 30px;
-     }
- 
-     .icon {
-       font-size: 60px;
-       margin-bottom: 20px;
-     }
- 
-     .footer {
-       font-size: 14px;
-       margin-top: 30px;
-       color: #999;
-     }
- 
-     @keyframes fadeIn {
-       from {
-         opacity: 0;
-         transform: translateY(-20px);
-       }
-       to {
-         opacity: 1;
-         transform: translateY(0);
-       }
-     }
-   </style>
- </head>
- <body>
-   <div class="container">
-     <div class="icon">
-       <img src="{{LOGO}}" alt="" />
-     </div>
-     <h1>We're getting things ready</h1>
-     <p>
-       <strong>{{BRAND}}</strong> is currently under maintenance.<br>Please check back in a few minutes.
-     </p>
-     <div class="footer">
-       &copy; {{BRAND}} ©Copyright 2025. All Rights Reserved.
-     </div>
-   </div>
- </body>
- </html>
- `
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>{{BRAND}} — Maintenance</title>
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <link rel="preconnect" href="https://fonts.googleapis.com">
+  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+  <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap">
+  <style>
+    :root {
+      color-scheme: light;
+      --background: hsl(216 30% 95%);
+      --foreground: hsl(222 42% 10%);
+      --card: hsl(0 0% 100%);
+      --muted-foreground: hsl(218 16% 44%);
+      --primary: hsl(211 100% 47%);
+      --border: hsl(216 22% 86%);
+      --radius: 0.75rem;
+      --shadow: 0 10px 30px -12px hsl(222 42% 10% / 0.18), 0 2px 6px -2px hsl(222 42% 10% / 0.08);
+    }
+    @media (prefers-color-scheme: dark) {
+      :root {
+        color-scheme: dark;
+        --background: hsl(222 25% 10%);
+        --foreground: hsl(220 15% 93%);
+        --card: hsl(222 22% 14%);
+        --muted-foreground: hsl(220 10% 58%);
+        --primary: hsl(211 100% 50%);
+        --border: hsl(222 20% 20%);
+        --shadow: 0 10px 30px -12px hsl(0 0% 0% / 0.6), 0 2px 6px -2px hsl(0 0% 0% / 0.4);
+      }
+    }
+    * { margin: 0; padding: 0; box-sizing: border-box; }
+    body {
+      font-family: 'Inter', system-ui, -apple-system, sans-serif;
+      background-color: var(--background);
+      color: var(--foreground);
+      display: flex;
+      justify-content: center;
+      align-items: center;
+      min-height: 100vh;
+      padding: 20px;
+      -webkit-font-smoothing: antialiased;
+    }
+    .container {
+      width: 100%;
+      max-width: 480px;
+      background-color: var(--card);
+      border: 1px solid var(--border);
+      border-radius: var(--radius);
+      padding: 40px;
+      text-align: center;
+      box-shadow: var(--shadow);
+      animation: fadeUp 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
+    }
+    .icon { margin-bottom: 24px; display: flex; justify-content: center; }
+    .icon img { width: 64px; height: auto; object-fit: contain; }
+    h1 {
+      font-size: 24px;
+      font-weight: 600;
+      letter-spacing: -0.01em;
+      margin-bottom: 12px;
+    }
+    p {
+      font-size: 15px;
+      line-height: 1.6;
+      color: var(--muted-foreground);
+      margin-bottom: 28px;
+    }
+    p strong { color: var(--foreground); font-weight: 600; }
+    .dot {
+      display: inline-flex;
+      align-items: center;
+      gap: 8px;
+      font-size: 13px;
+      font-weight: 500;
+      color: var(--primary);
+      padding: 6px 12px;
+      border: 1px solid var(--border);
+      border-radius: 999px;
+    }
+    .dot::before {
+      content: "";
+      width: 8px;
+      height: 8px;
+      border-radius: 999px;
+      background: var(--primary);
+      animation: pulse 1.6s ease-in-out infinite;
+    }
+    .footer {
+      font-size: 12px;
+      margin-top: 32px;
+      color: var(--muted-foreground);
+    }
+    @keyframes fadeUp {
+      from { opacity: 0; transform: translateY(14px); }
+      to { opacity: 1; transform: translateY(0); }
+    }
+    @keyframes pulse {
+      0%, 100% { opacity: 1; }
+      50% { opacity: 0.35; }
+    }
+    @media (prefers-reduced-motion: reduce) {
+      .container, .dot::before { animation: none; }
+    }
+  </style>
+</head>
+<body>
+  <div class="container">
+    <div class="icon">
+      <img src="{{LOGO}}" alt="{{BRAND}}" />
+    </div>
+    <h1>We're getting things ready</h1>
+    <p><strong>{{BRAND}}</strong> is currently under maintenance.<br>Please check back in a few minutes.</p>
+    <span class="dot">Reconnecting</span>
+    <div class="footer">&copy; {{BRAND}} 2025. All rights reserved.</div>
+  </div>
+</body>
+</html>
+`
