styles.css

*,
*::after,
*::before {
  box-sizing: border-box;
  font: 700 16px / normal 'Lora', serif;
}

body {
  background: linear-gradient(to right, #2fc5ba, #62c6c9, #2fc5ba);
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  overflow: hidden;
  display: flex;
}

.clock {
  --spacing: 10vmin;
  --size: 75vmin;
  --dark: #222;

  border: calc(var(--spacing) / 3) solid black;
  background-color: rgb(255 255 255 / 0.8);
  padding: calc(var(--spacing) / 2);
  box-shadow: inset 40px 40px 90px rgb(0 0 0 / 0.2),
    inset 10px 10px 30px rgb(0 0 0 / 0.5), 20px 20px 30px rgb(0 0 0 / 0.4),
    40px 40px 60px rgb(0 0 0 / 0.4);
  height: var(--size);
  width: var(--size);
  position: relative;
  border-radius: 50%;
}

.clock:before {
  border: calc(var(--spacing) / 6) solid white;
  background: transparent;
  position: absolute;
  border-radius: 50%;
  display: block;
  content: '';
  height: 100%;
  width: 100%;
  left: 0;
  top: 0;
}
.clock:after {
  box-shadow: -6px -6px 1.5vmin rgb(255 255 255 / 0.8);
  background: transparent;
  border-radius: 50%;
  position: absolute;
  display: block;
  height: 104%;
  width: 104%;
  content: '';
  left: -2%;
  top: -2%;
}

.clock .number {
  --rotation: 0;

  text-shadow: 2px 2px 3px rgb(0 0 0 / 0.5);
  height: calc(100% - var(--spacing));
  width: calc(100% - var(--spacing));
  transform: rotate(var(--rotation));
  text-align: center;
  position: absolute;
  color: var(--dark);
}
.clock .number span {
  --rotation: 0;
  font-size: calc(var(--spacing) / 2);
  transform: rotate(var(--rotation));
  display: block;
}

.clock .number:nth-child(1) {
  --rotation: 30deg;
}
.clock .number:nth-child(1) span {
  --rotation: -30deg;
}
.clock .number:nth-child(2) {
  --rotation: 60deg;
}
.clock .number:nth-child(2) span {
  --rotation: -60deg;
}
.clock .number:nth-child(3) {
  --rotation: 90deg;
}
.clock .number:nth-child(3) span {
  --rotation: -90deg;
}
.clock .number:nth-child(4) {
  --rotation: 120deg;
}

.clock .number:nth-child(4) span {
  --rotation: -120deg;
}
.clock .number:nth-child(5) {
  --rotation: 150deg;
}

.clock .number:nth-child(5) span {
  --rotation: -150deg;
}
.clock .number:nth-child(6) {
  --rotation: 180deg;
}

.clock .number:nth-child(6) span {
  --rotation: -180deg;
}
.clock .number:nth-child(7) {
  --rotation: 210deg;
}

.clock .number:nth-child(7) span {
  --rotation: -210deg;
}
.clock .number:nth-child(8) {
  --rotation: 240deg;
}

.clock .number:nth-child(8) span {
  --rotation: -240deg;
}
.clock .number:nth-child(9) {
  --rotation: 270deg;
}

.clock .number:nth-child(9) span {
  --rotation: -270deg;
}
.clock .number:nth-child(10) {
  --rotation: 300deg;
}

.clock .number:nth-child(10) span {
  --rotation: -300deg;
}
.clock .number:nth-child(11) {
  --rotation: 330deg;
}

.clock .number:nth-child(11) span {
  --rotation: -330deg;
}

.clock .hand {
  --rotation: 0;

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

.hands .second {
  width: calc(var(--spacing) / 12);
  background-color: red;
  height: 35%;
}

.hands .second::before {
  transform: translate(-1.25vmin, 0.75vmin);
  top: calc(100% - var(--spacing) / 4);
  height: calc(var(--spacing) / 3);
  width: calc(var(--spacing) / 3);
  background-color: red;
  position: absolute;
  border-radius: 50%;
  display: block;
  content: '';
  z-index: 20;
  left: 0;
}
.hands .second::after {
  transform: translate(-1.25vmin, 0.75vmin);
  top: calc(100% - var(--spacing) / 5.5);
  height: calc(var(--spacing) / 5);
  width: calc(var(--spacing) / 5);
  left: calc(var(--spacing) / 16);
  border: 0.5vmin solid white;
  background-color: var(--dark);
  position: absolute;
  border-radius: 50%;
  display: block;
  content: '';
  z-index: 21;
}

.hands .minute {
  width: calc(var(--spacing) / 6);
  background-color: var(--dark);
  height: 32%;
}

.hands .minute::after {
  border-radius: var(--spacing);
  background-color: white;
  position: absolute;
  display: block;
  content: '';
  z-index: 20;
  height: 80%;
  width: 20%;
  left: 40%;
  top: 8%;
}

.hands .hour {
  width: calc(var(--spacing) / 4);
  background-color: var(--dark);
  height: 26%;
}
.hands .hour::after {
  border-radius: var(--spacing);
  background-color: white;
  position: absolute;
  display: block;
  content: '';
  z-index: 20;
  height: 80%;
  width: 20%;
  left: 40%;
  top: 8%;
}