style.css

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

body{
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #1a2a6c;  /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #fdbb2d, #b21f1f, #1a2a6c);  /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #fdbb2d, #b21f1f, #1a2a6c); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */

}

.clock{
    width: 350px;
    height: 350px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: white url(./Res/clock.png);
    background-size: cover;
    border-radius: 50%;
    border: 20px solid whitesmoke;
    box-shadow: inset 0 0 30px rgba(0, 0, 0, .3);
}

.clock::before{
    content: '';
    position: absolute;
    width: 15px;
    height: 15px;
    background: grey;
    border: 2px solid #fff;
    z-index: 100000;
    border-radius: 50%;
}

.hour,
.min,
.sec{
    position: absolute;
}

.hour, .hr{
    width: 160px;
    height: 160px;
}

.min, .mn{
    width: 190px;
    height: 190px;
}

.sec, .sc{
    width: 230px;
    height: 230px;
}

.hr, .mn, .sc{
    display: flex;
    justify-content: center;
    position: absolute;
    border-radius: 50%;
}

.hr::before{
    content: '';
    position: absolute;
    width: 8px;
    height: 80px;
    background: #848484;
    z-index: 10;
    border-radius: 6px 6px 0 0;
}

.mn::before{
    content: '';
    position: absolute;
    width: 4px;
    height: 90px;
    background: #d6d6d6;
    z-index: 10;
    border-radius: 6px 6px 0 0;
}

.sc::before{
    content: '';
    position: absolute;
    width: 2px;
    height: 150px;
    background: #8f2727;
    z-index: 10;
    border-radius: 6px 6px 0 0;
}