body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #222;
    color: #fff;
    font-size: 10rem;
    user-select: none;
    cursor: crosshair;
}
#face {
    transition: transform 0.1s;
}
.ripple {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background-color: #fff;
    opacity: 0.5;
}
footer {
    position: fixed;
    bottom: 0;
    right: 0;
    padding: 1rem;
    font-size: 1rem;
    color: #fff;
}