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Good morning, I’m creating a responsive web page and I’d like the top of the card to always be right in the middle of the image I put in the background, regardless of the screen size. I have no idea how to do this. Please help me.
* {
    margin: 0;
    padding:0;
}
html, body {
	overflow: hidden;
    width: 100%;
    height: 100%;
}
.fundo1{
	display: table;
  	width: 100%;
  	height: 35%;
  	padding: 100px 0;
  	color: white;
 	background: url('https://images.unsplash.com/photo-1526374965328-7f61d4dc18c5?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1050&q=80') no-repeat bottom center scroll;
  	background-position: 30% 45%;
  	background-size: cover;
  	filter: blur(6px);
  	position: absolute;
}
.meucard{
	margin-top: 15%;
}<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8"/>
		<title>Pagina web</title>
		<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
</head>
<body>
	<div class="fundo1">
		
	</div>
	<div class="container meucard">
		<div class="card text-center">
			<div class="card-body">
				<h5 class="card-title">Principal</h5>
				<p class="card-text">Contato</p>
				<a href="#" class="btn btn-primary">Teste</a>
			</div>
		</div>
	</div>
</body>
</html>