style.css

html {
    box-sizing: border-box;
    font-family: Gotham Rounded, sans-serif;
}

body {
    background-image: linear-gradient(to right top, #051937, #004d7a, #008793, #00bf72, #a8eb12);;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

.clock {
    width: 500px;
    height: 500px;
    background-color: wheat;
    border-radius: 50%;
    border: 4px solid black;
    position: relative;
}

.clock .number {
    --rotation: 0;
    position: absolute;
    width: 100%;
    height: 100%;
    text-align: center;
    transform: rotate(var(--rotation));
    font-size: 2rem;
}

.clock .number1 {--rotation: 30deg;}
.clock .number2 {--rotation: 60deg;}
.clock .number3 {--rotation: 90deg;}
.clock .number4 {--rotation: 120deg;}
.clock .number5 {--rotation: 150deg;}
.clock .number6 {--rotation: 180deg;}
.clock .number7 {--rotation: 210deg;}
.clock .number8 {--rotation: 240deg;}
.clock .number9 {--rotation: 270deg;}
.clock .number10 {--rotation: 300deg;}
.clock .number11 {--rotation: 330deg;}

.clock .hand {
    --rotation: 0;
    position: absolute;
    left: 50%;
    bottom: 50%;
    border: 1px white solid;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    transform-origin: bottom;
    z-index: 10;
    transform: translateX(-50%) rotate(calc(var(--rotation) * 1deg));
}

.clock::after {
    content: '';
    position: absolute;
    background-color: black;
    z-index: 11;
    width: 15px;
    height: 15px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
}

.clock .hand.second {
    background-color: red;
    width: 2px;
    height: 45%;
}

.clock .hand.minute {
    background-color: black;
    width: 7px;
    height: 40%;
}

.clock .hand.hour {
    background-color: black;
    width: 10px;
    height: 35%;
}