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

html, body {
    height: 100%;
    width: 100%;
    overflow: hidden;
    background: #000;
}

video {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    height: 100vh;
    object-fit: contain;
    z-index: 1;
}