* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: sans-serif;
}
body {
    background: black;
    overflow: hidden;
}

#life {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 1px solid white;
    max-width: 100%;
    max-height: 100%;
}