style.css

body {
	position: relative;
	padding: 0;
	margin: 0;
	/*background: url('image.jpg') 20% center no-repeat;
	background-size: cover;*/
}

body:before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background: rgba(9, 130, 10, 0.64);
}

#overlay {
	color: white;
	width: 100%;
}

#container {
	position: relative;
	max-width: 600px;
	margin: 0 auto;
	padding: 30px 0;
}

#overlay a {
	color: white;
	text-decoration: none;
}

#overlay a:hover {
	opacity: .8;
}

#buttons {
	margin-top: 10px;
}

h1 {
	margin: 0 0 20px 0;
}

button {
	background-color: transparent;
	color: white;
	border: 1px solid white;
	border-radius: 3px;
	margin: 10px!important;
	padding: 5px 10px;
	text-align: left;
	outline: none;
	cursor: pointer;
}

button:hover {
	background: #ffc823;
	color: #fff;
	border: 1px solid #ffc823;
}