body {
    background-color: #000;
    color: #fff;
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    text-align: center;
}

header {
    padding: 20px;
}

h1 {
    font-size: 2.5em;
    margin: 0;
}

main {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

#image-container {
    width: 80%;
    max-width: 900px;
    border: 2px solid white;
    padding: 10px;
}

#slideshow-image {
    width: 100%;
    height: auto;
    display: block;
}