style.css

* {
  box-sizing: border-box;
}

body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
  overflow: hidden;
  background-color: #fff;
}

.container {
  display: flex;
  align-items: center;
  margin: 10px 0;
  width: 200px;
}

.toggle {
  visibility: hidden;
}

.label {
  position: relative;
  display: inline-block;
  width: 80px;
  height: 40px;
  cursor: pointer;
  background-color: gray;
  border-radius: 30px;
  transition: background-color 0.3s linear;
}

.ball {
  position: absolute;
  top: 3px;
  left: 3px;
  background-color: #fff;
  width: 35px;
  height: 35px;
  border-radius: 50%;
  transition: transform 0.3s linear;
}

.toggle:checked + .label {
  background-color: rgb(132, 45, 218);
}

.toggle:checked + .label .ball {
  transform: translateX(38px);
}