Jak zrobić w tym kodzie by fioletowy kwadrat był pod divem container?
<!DOCTYPE html>
<html lang="pl">
<head>
<title></title>
<meta name="heywords" content="">
<meta name="description">
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="css.css">
<script src="main.JS"></script>
</head>
<body>
<div id="karton"></div>
<div id="container"></div>
</body>
</html>
body{
background-color: #14213D ;
}
#container{
width: 1000px;
height: 1500px;
background-color: teal;
margin-top: 40px;
background: linear-gradient(30deg, #000000 40%,#e5e5e5 100%);
border-radius: 50px;
margin-left: 250px;
filter: blur(30px);
opacity: 15%;
position:absolute;
}
#karton{
background-color: violet;
width: 200px;
height: 200px;
margin-left: 200px;
top: 400px;
}