body {
    margin: 0;
    font-family: Arial, sans-serif;
}

#flash-image {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: white; /* Change as needed */
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

#flash-image img {
    max-width: 80%;
    height: auto;
}