<div class="container">
  <a class="github-button" href="https://github.com/erenesto/pure-css-watch" target="_blank">Github</a>
  <div class="clock">    
    <div class="clock-circle">
      <!-- <span></span> -->
      <div class="clock-indicators">
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
        <div class="clock-indicators__item"></div>
      </div>
      <div class="clock-cycles">
        <div class="clock-cycles__second"></div>
        <div class="clock-cycles__minute"></div>
        <div class="clock-cycles__hour"></div>
      </div>
    </div>
    <div class="clock-belt"></div>
    <div class="clock-belt"></div>
    <div class="clock-button"></div>
  </div>
</div>

@import url('https://fonts.googleapis.com/css2?family=Montserrat&display=swap');

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.container {
  width: 100vw;
  height: 100vh;
  background: hsl(200, 10%, 90%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.github-button {
  position: absolute;
  display: inline-block;
  padding: 12px 14px;
  color: #FFFFFF;
  background: #222;
  text-decoration: none;
  border-radius: 4px;
  right: 4%;
  top: 4%;
  font-size: 14px;
  font-weight: 600;
  font-family: 'Montserrat', sans-serif;
}

.clock {
  width: 200px;
  height: 200px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  
  span {
    background: #fff;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    display: block;
  }
  
  
  &-circle {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: hsl(0, 0%, 4%);
    background: linear-gradient(to top, hsl(0, 0%, 94%) 0%, hsl(0, 0%, 99%) 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 10px solid #000;
    z-index: 10;
  }
  
  &-belt {
    width: 120px;
    height: 200px;
    background: hsl(0, 0%, 6%);
    position: absolute;
    border-radius: 40%;
    &:nth-child(2) {
      transform: translateY(-60%);
      clip-path: polygon(20% 0%, 80% 0%, 100% 100%, 0% 100%);
      background: linear-gradient(to top, hsl(0, 0%, 20%) 0%, hsl(0, 0%, 2%) 100%);
    }
    &:nth-child(3) {
      transform: translateY(60%);
      clip-path: polygon(0 0, 100% 0, 80% 100%, 20% 100%);
      background: linear-gradient(to bottom, hsl(0, 0%, 20%) 0%, hsl(0, 0%, 2%) 100%);
    }
  }
  
  &-indicators {
    position: absolute;
    width: 80%;
    height: 80%;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    &__item {
      position: absolute;
      left: calc(50% - 1px);
      width: 2px;
      transform-origin: bottom center;
      z-index: 2;
      background: none;
      height: 84px;
      top: -12px;
      opacity: 1;
      
      &:after {
        content: "";
        position: absolute;
        width: 2px;
        height: 7px;
        background: #000;
        left: 0;
        top: 0;
      }
      @for $i from 1 through 60 {
        &:nth-of-type(#{$i}) {
          transform: rotateZ(calc(6deg * #{$i}));
        }
        
        @if $i % 5 == 0 {
          &:nth-of-type(#{$i}) {
            width: 2px;
            &:after {
              height: 15px;
              width: 6px;
              left: -2px;
            }
          }
        }
      }
    }
  }
  &-cycles {
    position: absolute;
    width: 100%;
    height: 100%;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    
    &__second,
    &__minute,
    &__hour {
      position: absolute;
      width: 6px;
      background: #000;
      z-index: 2;
      height: 75px;
      left: 49%;
      top: 17%;
      transform-origin: 50% 80%;
      box-shadow: 0px 0px 4px 0px rgba(0,0,0,0.4);
    }
    
    &__second {
      animation: tictoc 60s infinite steps(60);
      z-index: 3;
      background-color: hsl(0, 72%, 47%);
      width: 2px;
      left: 49.5%;
      &::after {
        content: '';
        position: absolute;
        width: 12px;
        height: 12px;
        border-radius: 50%;
        background-color: hsl(0, 72%, 47%);
        top: -4px;
        left: 50%;
        transform: translateX(-50%);
      }
    }
    &__minute {
      animation: tictoc 3600s infinite steps(60);
      transform: rotateZ(60deg);
    }
    &__hour {
      animation: tictoc 43200s infinite;
      transform: rotateZ(220deg);
    }
  }
  &-button {
    content: '';
    position: absolute;
    width: 6px;
    height: 20px;
    background-color: hsl(0, 72%, 47%);
    right: -4px;
    border-top-right-radius: 3px;
    border-bottom-right-radius: 3px;
  }
}

@keyframes tictoc {
  to {
    transform: rotateZ(360deg);
  }
}