roundedButton.css

/* The switch - the box around the slider */
.switch {
  position: relative;
  display: inline-block;
  width: 45px;
  height: 18px;
}

/* Hide default HTML checkbox */
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

/* The slider */
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgb(138, 138, 138);
  -webkit-transition: .4s;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 10px;
  width: 10px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  -webkit-transition: .4s;
  transition: .4s;
}

input:checked + .slider {
  background-color: rgb(8, 228, 118);
}

input:focus + .slider {
  box-shadow: 0 0 3px #01111f;
}

input:checked + .slider:before {
  -webkit-transform: translateX(26px);
  -ms-transform: translateX(26px);
  transform: translateX(26px);
}

/* Rounded sliders */
.slider.round {
  border-radius: 30px;
}

.slider.round:before {
  border-radius: 50%;
}