*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html,body{
    height: 100%;
    width: 100%;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: black;
}
body{
    position: relative;
    height: 100%;
    width: 100%;
    
}
:root{
    --x: 200px;
    --y: 200px;
}

.box{ 
    position: absolute;
    z-index: 2;   
    height: 100%;
    width: 100%;
    background: radial-gradient(150px at var(--x) var(--y) , rgba(137, 137, 137, 0),rgba(0, 0, 2, 0.952));
    
}
video{
    position: absolute;
    z-index: 1;
    height: 100%;
    width: 100%;
    object-fit: cover;
    object-position: center;
}