Animated Gradient Shadow

Animated Gradient Shadow

HTML CODE

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="try.css">
    <title>Document</title>
</head>
<body>
    <div class="main"><h1>Jennie Kim</h1></div>
</body>
</html>

CSS CODE

*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body{
    margin: 0;
    padding: 0;
    background-color: black;
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;  /*To bring div at Center*/
    align-items: center;     /*To bring div at Center*/
}

.main{
    position: relative;
    margin: 200px;
    width: 400px;
    height: 250px;
    background: black;
    color: white;
    display: flex;
    justify-content: center;   /*To bring Text at Center of Div*/
    align-items: center;       /*To bring Text at Center of Div*/
    font-family: Product Sans;
    font-size: 1.5rem;

}

.main::before{
    content: "";
    position: absolute;
    top: -2px;
    left: -2px;
    background: linear-gradient(45deg, red,orange,yellow,green,blue,indigo,violet);
    background-size: 400%;
    width: calc(100% + 4px);
    height: calc(100% + 4px);
    z-index: -1;
    animation: madan 20s linear infinite;
}
.main:before, .main:after{
    filter: blur(20px);
}

@keyframes madan{
    0%{
        background-position: 0 0;
    }

    50%{
        background-position: 200% 0;
    }

    100%{
        background-position: 0 200%;
}
}


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