html, body {
    height: 100%;
}

html {
    display: table;
    margin: auto;
}

body {
    display: table-cell;
    background-color: #D3D3D3;
}

h1 {
    text-align: center;
    margin: 0 auto;
    width: 400px;
    color: #A0A0A0;
}
a:link {
    color: white;
}

a:visited {
    color: grey;
}