*{
    box-sizing: border-box;
}
body{
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background-color: #333;

    justify-content: center;
    align-items: center;
    font-family: Arial, Helvetica, sans-serif;
}
h1, h2{
    display: block;
    color: white;
    margin-left: 16px;
}
xmp{
    background-color: antiquewhite;
    padding-left: 16px;
    color: #333;
    width: 100%;
}