html, body {
    overflow: none;
    height:100%;
    font-family: "Sans-serif", Verdana;
}
body {
    background-color: #021129;
    color: white;
    text-align: center;
    background-image: linear-gradient(#021129, black);
    height:90vh;
}
div {
    height: 100%;
    line-height: 100px;
    text-align: center;
}