.title{
    color: blue;
    font-size: 500%;
}
body{
    background-image: url("https://images.hdqwalls.com/wallpapers/confidential-top-secret-4k-t2.jpg");
    background-size: cover;
    text-align: center;
}
.warning{
    color: red;
    font-size: smaller;
}
.countdown{
    font-size: 70px;
    color: white;
}