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

body{
    height: 100vh;
    width: 100vw;
    background-color: limegreen;
    display: flex;
    justify-content: center;
    align-items: center;
}

.clock{
    background-color:lightblue ;
    font-weight: bolder;
    border-radius: 1rem;
    letter-spacing:.5rem;
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.clock div {
    background-color: #fff;
    border-radius: 2rem;
    padding: 1rem;
}


/* desktop responsive */

@media only screen and (min-width:768px) {
    
    .clock{
        font-size: 7rem;
    }

    
}