html {
    background-color: black;
    color: Azure;
    height: 100% ;
    text-align: center ;
}
body {
    height: 100% ;
    margin: auto ;
    display: flex ;
    flex-direction: column ;
    align-items: center ;
    justify-content: center ;
}
a {
    color: Azure;
}
a:visited {
    color: LightSalmon;
}
img {
    max-width: 720px;
    width: 100% ;
}