body {
  background-color: #3B3E81;
}

form {
  max-width: 480px;
}

img {
  pointer-events: none;
  user-select: none;
}

img.mobile {
  display: none;
}
img.desktop {
  display: inline;
}
@media only screen and (max-width: 767px) {
  img.mobile {
    display: inline;
  }
  img.desktop {
    display: none;
  }
}