<!DOCTYPE html>
<html lang="pt-BR">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Abrir Itaú App</title>
  <style>
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      display: flex;
      align-items: center;
      justify-content: center;
      height: 100vh;
      background: #f0f4f8;
      font-family: Arial, sans-serif;
    }
    .container {
      text-align: center;
      padding: 2rem;
      background: #fff;
      border-radius: 8px;
      box-shadow: 0 4px 6px rgba(0,0,0,0.1);
      max-width: 400px;
      width: 90%;
    }
    h1 {
      font-size: 1.5rem;
      color: #1f3a93;
      margin-bottom: 1.5rem;
    }
    button {
      width: 100%;
      padding: 0.75rem;
      font-size: 1rem;
      color: #fff;
      background: #0051a8;
      border: none;
      border-radius: 4px;
      cursor: pointer;
      transition: background 0.3s;
    }
    button:hover {
      background: #003d80;
    }
    @media (max-width: 400px) {
      h1 {
        font-size: 1.25rem;
      }
      button {
        font-size: 0.9rem;
        padding: 0.6rem;
      }
    }
  </style>
</head>
<body>
  <div class="container">
    <h1>Abrir App Itaú</h1>
    <button id="open-itau">Abrir Itaú</button>
  </div>

  <script>
    (function() {
      var scheme = 'itau://';
      var fallback = 'https://play.google.com/store/apps/details?id=com.itau';
      var btn = document.getElementById('open-itau');
      btn.addEventListener('click', function() {
        window.location = scheme;
        setTimeout(function() {
          window.location = fallback;
        }, 1500);
      });
    })();
  </script>
</body>
</html>
