body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: url('Bulk_message.png') no-repeat center center fixed;
  background-size: cover;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pin-container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(255,255,255,0.85);
  padding: 20px;
  border-radius: 10px;
  text-align: center;
}
.message-style h2 {
  color: #0d47a1;
}
input[type="password"] {
  padding: 10px;
  font-size: 16px;
  margin-bottom: 10px;
}
button {
  padding: 10px 20px;
  font-size: 16px;
  background-color: #1565c0;
  color: white;
  border: none;
  border-radius: 5px;
}
.shake {
  animation: shake 0.3s;
}
@keyframes shake {
  0% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  50% { transform: translateX(5px); }
  75% { transform: translateX(-5px); }
  100% { transform: translateX(0); }
}