style.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600&display=swap');

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-image: url("https://images.unsplash.com/photo-1419242902214-272b3f66ee7a?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1213&q=80");
    background-repeat: no-repeat;
    background-size: cover;
    color: white;
    height: 100vh;
    width: 100vw;
    font-family: 'Poppins', sans-serif;
}

.main__content {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100vw;
    height: 100vh;
    flex-direction: column;
}

h1 {
    font-size: 4rem;
    font-weight: 400;
}

.countDown__timer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1.2rem;
    width: 50%;
    font-weight: 400;
}
.countDown__timer div{
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-direction: column;
}
.countDown__timer div span{
    font-size: 1.2rem;
    font-weight: 300;
}
.big__text{
    font-size: 6rem;
    font-weight: 700;
}