body, html {
    height: 100%;
    margin: 0;
    font-family: Arial, sans-serif;
    color: white;
    overflow: hidden;
}

.container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    text-align: center;
    background-image: url('https://images.unsplash.com/photo-1589939705384-5185137a7f0f?q=80&w=2070&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D');
    background-size: cover;
    background-position: center;
}

h1 {
    font-size: 5em;
    margin: 0;
}

h2 {
    font-size: 2em;
    margin-top: 0;
}

#countdown {
    font-size: 3em;
    margin-top: 20px;
}