html,
body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

main {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.disclaimer {
    padding: 1em;
    text-align: center;
    font-size: 2.5em;
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
}