body {
    min-height: 100vh;
    margin: 0;
    background-color: midnightblue;
    color: #f0f0f0;
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
}

main {
    text-align: center;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}