.clock {
  width: 30rem;
  height: 30rem;
  margin: 50px auto;
  position: relative;

  border: 2px solid white;
  border-radius: 50%;
  padding: 2rem;
  box-shadow: 0 0 0 4px rgba(0,0,0,0.1),
    inset 0 0 0 3px #efefef,
    inset 0 0 10px black,
    0 0 10px rgba(0,0,0,0.2);
}

.clock__face {
  width: 100%;
  height: 100%;
  position: relative;

  transform: translateY(-3px);
}

.clock__face:after {
  position: absolute;
  content: '';
  height: 30px;
  width: 30px;
  display: block;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);

  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px #000;
  background: #000;
}

.clock__hand {
  width: 50%;
  height: 6px;
  position: absolute;
  top: 50%;

  background: #000;
  transform-origin: 100%;
  transform: rotate(90deg);
  transition: all 0.05s;
  transition-timing-function: cubic-bezier(0.1, 2.7, 0.58, 1);
}

.clock__hand--second {
  box-shadow: 0 0 0 1px #000;
  border-left: 5px solid #fff;
  box-sizing: border-box;
}

.clock__hand--minute {
  box-shadow: 0 0 0 2px #000;
  border-left: 20px solid #fff;
  box-sizing: border-box;
}

.clock__hand--hour {
  height: 10px;

  box-shadow: 0 0 0 3px #000;
  border-left: 40px solid #fff;
  box-sizing: border-box;
}

.clock__hand--initial {
  visibility: hidden;
}

.clock__section {
  position: absolute;

  background: #ccc;
}

.clock__section--12oclock {
  height: 20px;
  width: 1px;
  top: 5px;
  left: 50%;
}

.clock__section--3oclock {
  height: 1px;
  width: 20px;
  right: 5px;
  top: 50%;
}

.clock__section--6oclock {
  height: 20px;
  width: 1px;
  bottom: 5px;
  left: 50%;
}

.clock__section--9oclock {
  height: 1px;
  width: 20px;
  left: 5px;
  top: 50%;
}