style.css

*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: sans-serif;
    background-color: rgb(12, 117, 100);
}
body{
    width:100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    color:white
}
h1{
    font-size: 48px;
    margin-bottom: 35px;
    letter-spacing: 2px;
    color: rgb(235, 193, 10);
    text-shadow: 4px 4px black;
}
.countdown{
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow :0 5px 25px rgba(0,0,0,0.3);
    padding: 40px 15px;
    border-radius: 20px;
    backdrop-filter: blur(50px);
}
.timer{
    background-color: rgba(255,255,255,0.2);
    padding: 20px;
    margin:  10px;
    height: 100%;
    width: 100%;
    border-radius: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    transition: background-color 0.8s ease-in-out;
}
.label{
    background-color: rgba(255,255,255,0.03);
    color: rgb(29, 235, 10);
    font-size: 35px;
    font-weight: 400;
    margin: 10px;
    text-transform: uppercase;
    text-shadow: 1px 1px white;
}
.time{
    background-color: rgba(255,255,255,0.03);
    color: white;
    text-shadow: 3px 3px black;
    font-weight: 700;
    font-size: 60px;
}
.timer:hover{
    background-color: rgba(255,255,255,0.5);
}
@media (max-width:1024px) {
    .countdown{
        flex-wrap: wrap;
    }
    .timer{
        max-height:150px;
        max-width: 130px;
        margin: 15px;
    }
}
@media (max-width:1024px) {
    h1{
        font-size: 40px;
    }
    .time{
        font-size: 30px;
    }
    .label{
        font-size: 20px;
    }
    .timer{
        max-height:100px;
        max-width: 90px;
        margin: 15px;
    }
}