body {
	background: url(https://bit.ly/2MTZAvO) no-repeat center center fixed;
	background-size: cover;
}

header {
	color: green;
	padding: .5rem 0;
	margin: 1rem, 1rem;
	background-color: rgba(255, 255, 255, .5);
	text-align: center;
	font-size: 2.5rem;
	font-family: 'Lora', serif;
	text-transform: uppercase;
}

.btn-danger {
	position: absolute;
	left: 50%;
	bottom: 10%;
	transform: translateX(-50%);
	background-color: rgb(255, 45, 45);
	border: 2px solid rgba(140, 32, 32, .8);
}