flash.moe/assets/2021.css/clock.css

.clock {
    width: 200px;
    height: 200px;
    border-radius: 100%;
    border: 4px solid #c0c0c0;
    overflow: hidden;
    box-sizing: content-box;
    filter: drop-shadow(0 1px 5px #000);
}
.clock-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #fffd;
    filter: blur(20px);
}
.clock-center {
    position: absolute;
    top: 96px;
    left: 96px;
    width: 8px;
    height: 8px;
    background-color: #000;
    border-radius: 100%;
    z-index: 1000;
}
.clock-hand {
    --hand-rotation: 0deg;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: rotate(var(--hand-rotation));
    z-index: 900;
}
.clock-hand-display {
    position: absolute;
    width: 2px;
    left: 99px;
    height: 99px;
    background-color: #000;
}
.clock-hand-hours {
    z-index: 910;
}
.clock-hand-minutes {
    z-index: 920;
}
.clock-hand-seconds {
    z-index: 930;
}
.clock-hand-hours .clock-hand-display {
    height: 70px;
    margin-top: 30px;
    filter: drop-shadow(0 1px 2px #000);
}
.clock-hand-minutes .clock-hand-display {
    height: 80px;
    margin-top: 20px;
    filter: drop-shadow(0 1px 3px #000);
}
.clock-hand-seconds .clock-hand-display {
    height: 100px;
    margin-top: 15px;
    opacity: .6;
    background-color: #f00;
    filter: drop-shadow(0 1px 4px #000);
}
.clock-number {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 500;
    width: 100px;
    height: 100px;
}
.clock-number-display {
    position: absolute;
    width: 2px;
    height: 10px;
    background-color: #000;
}
.clock-number-9 .clock-number-display,
.clock-number-3 .clock-number-display {
    width: 10px;
    height: 2px;
}
.clock-number-6 .clock-number-display {
    bottom: 0;
}
.clock-number-12 .clock-number-display {
    right: 0;
    height: 15px;
}
.clock-number-3 .clock-number-display {
    right: 0;
    bottom: 0;
}
.clock-number-12 {
    left: 1px;
}
.clock-number-9 {
    top: 99px;
}
.clock-number-6 {
    top: 100px;
    left: 99px;
}
.clock-number-3 {
    top: 1px;
    left: 100px;
}