body {
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #74ebd5, #9face6);
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.bank-container {
  background: #fff;
  width: 350px;
  padding: 20px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

h1 {
  margin-bottom: 20px;
}

.menu button {
  width: 100%;
  padding: 10px;
  margin: 8px 0;
  border: none;
  background: #4caf50;
  color: white;
  font-size: 16px;
  border-radius: 5px;
  cursor: pointer;
}

.menu button:hover {
  background: #43a047;
}

.output {
  margin-top: 15px;
  padding: 10px;
  background: #f1f1f1;
  border-radius: 5px;
  min-height: 50px;
}