body {
    margin: 0;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

#mainImage {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(7);
    transition: transform 1s ease;
}