*{
    margin: 0;
    box-sizing: border-box;
    padding: 0;
}
body{
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}
/* clock body style */
.clock-body{
    width: 300px;
    height: 300px;
    background-color: aqua;
    border-radius: 50%;
    position: relative;
}
/* clock number style */
.number{
    --angle:0;
    text-align: center;
    width: 100%;
    height: 100%;
    position: absolute;
    transform: rotate(var(--angle));
}
.number1{
    --angle: 30deg; 
}
.number2{
    --angle: 60deg; 
}
.number3{
    --angle: 90deg; 
}
.number4{
    --angle: 120deg; 
}
.number5{
    --angle: 150deg; 
}
.number6{
    --angle: 180deg; 
}
.number7{
    --angle: 210deg; 
}
.number8{
    --angle: 240deg; 
}
.number9{
    --angle: 270deg; 
}
.number10{
    --angle: 300deg; 
}
.number11{
    --angle: 330deg; 
}
.number12{
    --angle: 0deg; 
}
/* clock hands style */
.hand{
position: absolute;
right: 50%;
bottom: 50%;
transform-origin: bottom;
}
.clock-body::after{
    content: '';
    position: absolute;
    top: 50%;
    right: 50%;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: rgb(0, 0, 0);
    transform: translate(40%,-50%);
    z-index: 10;
    }
#hand-hour{
    --rotation:0;
    width: 5px;
    height: 50px;
    background-color: black;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    transform: translateX(25%) rotate(calc(var(--rotation) * 1deg));
}
#hand-min{
    --rotation:0;
    width: 2.5px;
    height: 80px;
    background-color: black;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    transform: rotate(calc(var(--rotation) * 1deg));
}
#hand-sec{
    --rotation:0;
    width: 1px;
    height: 100px;
    background-color: rgb(211, 7, 7);
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    transform: translateX(-50%) rotate(calc(var(--rotation) * 1deg));
}

/*style active hour*/
.active-hour{
    font-weight: bold;
    color: brown;
    font-size: 1.2rem;
}