.form-signin {
	width: 100%;
	max-width: 300px;
}
.form-contact {
	width: 100%;
	max-width: 500px;
}
.img-thumbnail {
	height: 150px;
}

.form-gbuch {
  width: 60%;
  max-width: 600px;
  padding: 15px;
  margin: 0 auto;
}