img {
    height: 100vh;
    margin: 0 auto;
    display: block;
    -webkit-box-shadow: 0px 1px 50px 18px #000000; 
    box-shadow: 0px 1px 50px 18px #000000;
}

body {
    margin: 0;
    padding: 0;
    background-color: #000;
    background-image: url('bg.png');
    background-size: cover;
}