style.css

body{
    margin: 0;
    font-family: sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100vh;
    justify-content: center;
    background-image: url(T3.jpg);
    background-size: cover;
    overflow: hidden;

}

h2{

    text-transform: uppercase;
    letter-spacing: 4px;
    font-size: 25px;
    text-align: center;
    color: aliceblue;
}

.clock{
    display: flex;

}

.clock div{
    margin: 5px;
    position: relative;

}
.clock span{

    width: 100px;
    height: 80px;
    background-color: chocolate;
    opacity: .8;
    color: rgb(252, 248, 248);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 50px;
    text-shadow: 2px 2px 4px rgb(2, 2, 2);

}
.clock .text{
    height: 30px;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 2px;
    background: rgb(17, 13, 1);
}

.clock #AM{

    bottom: 0;
    position: absolute;
    width: 60px;
    height: 30px;
    font-size: 20px;
    background: rgb(189, 102, 3);
}