style.css

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

* {
    box-sizing: border-box;
}

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-family: poppins;
    margin: 0;
    background-image: url(https://images.unsplash.com/photo-1507525428034-b723cf961d3e?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1473&q=80);
    min-height: 100vh;
    background-size: cover;
}

.countdown-container {
    display: flex;
}

h1{
    font-weight: normal;
    font-size: 3rem;
    margin-top: -5rem;
}

.big-text{
    font-weight: bold;
    font-size: 3rem;
    line-height: 1;
    margin: 0 3rem;
}

.countdownel {
    text-align: center;
    font-size: 1rem;
}

.input-container{
    font-size: 1.5rem;
    position: fixed;
    top: 0;
    left: 0;
    font-weight: bolder;
}