.container1 {
  width: auto;
  height: auto;
  background-color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}

.button {
  background-color: #d2d2d2;
  width: 100px;
  height: 50px;
  border-radius: 100px;
  cursor: pointer;
  position: relative;
}

.button::before {
  position: absolute;
  content: '';
  background-color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 200px;
  margin: 5px;
  transition: 0.2s;
}

input:checked + .button {
  background-color: #20096d;
}

input:checked + .button::before {
  transform: translateX(20px);
}

input {
  display: block;
}