body{
	position: relative;
}
body:before{
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	display: block;
	width: 100%;
	height: 100vh;
	background-color: rgba(0,0,0,0.5);
}
.card{
	max-width: 500px;
	min-width: 500px;
	background-color: rgba(255,255,255,0.8);
	border: none;
	padding:25px 0;
	margin: 30px;
}
.card-header{
	background-color: transparent;
}
.card-header h3{
	color: #000;
}
.card-header img{
	width: 150px;
}

@media (max-width: 500px){
	.card{
		max-width: 100%;
		min-width: 90%;
	}
}