body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #121212;
}

#slap-container {
    position: relative;
}

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

.slap-emoji {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 100px;
    opacity: 0;
    transition: opacity 0.2s ease-out;
}

#slap-container.slapped .slap-emoji {
    opacity: 1;
}