* {
  box-sizing: border-box;
}

body.light {
  color: #111;
  background-color: #fdfdfd;
}

.checkbox {
  opacity: 0;
  position: absolute;
}

.label {
  width: 38px;
  height: 16px;
  background-color: #fff;
  border: 1px solid #292c35;
  display: flex;
  border-radius: 50px;
  align-items: center;
  justify-content: space-between;
  padding: 5px;
  position: relative;
  transform: scale(1.5);
  float: right;
  margin: 20px 20px 10px 10px;
}

.label.light {
  background-color: #3c435b;
}

.ball {
  width: 16px;
  height: 13px;
  background-color: pink;
  position: absolute;
  /* top: 1px; */
  left: 1px;
  border-radius: 50%;
  transition: transform 0.2s linear;
}
.ball.light {
  background-color: white;
}

/*  target the elemenent after the label*/
.checkbox:checked + .label .ball {
  transform: translateX(18px);
}