body {
    background-color: #000;
    text-align: center;
    margin: 0;
    padding: 0;
}

img#slideshow {
    max-width: 98vw;
    max-height: 98vh;
    margin-top: 1vh;
    border: 4px solid white;
    box-shadow: 0 0 20px rgba(255,255,255,0.5);
    opacity: 1;
    transition: opacity 1s ease-in-out;
}