style.css

@import url(https://fonts.googleapis.com/css?family=Open+Sans:300,600);

body {
	margin: 0;
	padding: 0;
}

.container {
	background: url(bg-body.jpg) center center no-repeat;
	background-size: cover;
	position: relative;
}

.content {
	text-align: center;
	color: white;
	position: absolute;
	left: 50%;
	top: 50%;
	width: 300px;
	margin-left: -150px;
}

.content h1 {
	font-family: "Open Sans", sans-serif;
	font-weight: 300;
	font-size: 20px;
	line-height: 30px;
}

.content p {
	font-family: "Open Sans", sans-serif;
	font-weight: 300;
	font-size: 17px;
	line-height: 28px;
}

.content .btn {
	font-family: "Open Sans", sans-serif;
	color: white;
	background: rgb( 190, 13, 51 );
	text-decoration: none;
	padding: 20px;
	margin: 15px 0;
	display: block;
	transition: 400ms background ease-in-out, 400ms border ease-in-out;
	
}

.content .btn:hover {
	background: rgba( 190, 13, 51, .8 );
	border: 5px solid rgba( 255, 255, 255, .4 );
}

@media screen and ( min-width: 600px ) {

	.content {
		width: 500px;
		margin-left: -250px;
	}

	.content h1 {
		font-size: 30px;
		line-height: 40px;
	}

	.content .btn {
		display: inline-block;
		padding: 20px 30px;
		margin: 10px;
	}

}