html, body {
    height: 100%;
    width: 100%;
}

body {
    background-color: #fff;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    justify-items: center;
    align-items: center;
}

img {
    width: 80%;
    height: auto;
    margin: auto;
    max-height: 100%;
    max-width: 100%;
}