3step.css

.jumbotron {
	background-image: linear-gradient(to bottom left, #FA0, #f60);
}

.jumbotron img {
	width: auto;
	height: auto;
	max-height: 12em;
}

h1 {
	color: #fff;
	font-weight: bold;
}

.btn-primary {
	background-color: #f60;
	border-color: #f60;
}
.btn-primary:hover {
	background-color: #f80;
	border-color: #f80;
}