body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #121212;
    overflow: hidden; /* Hide the hand when it's off-screen. */
}

#slap-container {
    position: relative;
}

#slap-image {
    width: 400px;
    height: auto;
    border: 2px solid #f0f0f0;
    border-radius: 10px;
    cursor: pointer;
}

#hand {
    position: absolute;
    right: 20px;
    top: 50%;
    font-size: 150px;
    transform: translateY(-50%);
    transition: all 0.2s ease-in-out;
}

#fist {
    position: absolute;
    right: 20px;
    top: calc(50% + 150px); /* Position below the hand. */
    font-size: 150px;
    transform: translateY(-50%);
    transition: all 0.2s ease-in-out;
}