styles.css

*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --second-hand-background-color: red;
  --minute-hand-background-color: black;
  --hour-hand-background-color: black;
  --clock-size: 70vmin;
  --clock-hand-height: 1%;
  --clock-hand-width: 45%;
  --background-color: white;
  --foreground-color: black;
  --clock-background-color: white;
  --center-knob-size: 5%;
  --center-knob-color: black;
  --clock-bar-color: black;
  --clock-bar-height: 1%;
  --clock-bar-width: 5%;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background-color: #1c1c1c;
  }
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2em;
  min-height: 100vh;
  background-color: var(--background-color);
  color: var(--foreground-color);
}

.clock {
  width: var(--clock-size);
  height: var(--clock-size);
  border-radius: 50%;
  position: relative;
  background-color: var(--clock-background-color);
  background-image: url('https://freepngimg.com/download/oval/87492-numerals-art-point-clock-face-roman-line.png'),
    url('https://images.unsplash.com/photo-1541450805268-4822a3a774ca?q=80&w=1470&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D');
  background-size: cover;
  box-shadow: 4px 4px 16px rgba(0, 0, 0, 0.4), 8px 8px 24px rgba(0, 0, 0, 0.2),
    16px 16px 56px rgba(0, 0, 0, 0.1);
}

.hand {
  position: absolute;
  height: var(--clock-hand-height);
  width: var(--clock-hand-width);
  top: 50%;
  right: 50%;
  transform-origin: right;
  border-radius: 10px;
}

.hand-sec {
  background-color: var(--second-hand-background-color);
}
.hand-min {
  width: 30%;
  background-color: var(--minute-hand-background-color);
}
.hand-hour {
  background-color: var(--hour-hand-background-color);
  width: 20%;
}

.center-knob {
  position: absolute;
  width: var(--center-knob-size);
  height: var(--center-knob-size);
  background-color: var(--center-knob-color);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translateX(-50%) translateY(-50%);
}