body {
    display: flex;
    height: 100vh;
}

.center-countdown {
    margin: auto;
}

.center-countdown h2 {
    text-align: center;
}

@media (max-width: 475px) {
    .center-countdown img {
        width: 300px;
    }

    .center-countdown h2 {
        font-size: 17px;
    }
}