body {
  background: url('bg-ex.jpg') no-repeat transparent;
  background-size: cover;
}
.content {
  background-color: transparent;
}
label {
  background-color: rgba(255, 255, 255, 0.6);
}
input {
  background-color: transparent !important;
}
#login {
  position: fixed;
  bottom: 10px;
  z-index: 4;
  width: auto;
  left: 10px;
  right: 10px;
}