<input type="checkbox" class="toggle">
<div class="switch">
  <div class="inner">
    <div class="disc"></div>
  </div>
</div>

body {
  margin: 0;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: darkseagreen;
}

:root {
    --font-size: 20px;
}

.toggle {
    position: absolute;
    width: 10em;
  height: 5em;
  font-size: var(--font-size); 
    margin: 0;
    filter: opacity(0);
    cursor: pointer;
    z-index: 2;
}

.toggle ~ .switch {
  position: absolute;
  width: 10em;
  height: 5em;
  font-size: var(--font-size); 
  background: linear-gradient(silver, whitesmoke);
  border-radius: 2.5em;
  display: flex;
  align-items: center;
  justify-content: center;
}

.toggle ~ .switch .inner {
  width: 8em;
  height: 3.5em;
  background: linear-gradient(dimgray, silver);
  border-radius: 2em;
  box-shadow: inset 0 0 1.5em rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
}

.toggle ~ .switch .inner .disc {
  width: 3.5em;
  height: 3.5em;
  background: linear-gradient(to top, silver, whitesmoke);
  border-radius: 50%;
  box-shadow: 0 0.4em 0.6em rgba(0, 0, 0, 0.2);
  position: relative;
  left: -30%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 0.5s;
}

.toggle ~ .switch .inner .disc::before {
  content: 'OFF';
  position: absolute;
  width: 80%;
  height: 80%;
  background: linear-gradient(silver, whitesmoke);
  border-radius: 50%;
  text-align: center;
  line-height: calc(3.5em * 0.8);
  font-family: sans-serif;
  color: gray;
}

.toggle:checked ~ .switch .inner {
  background: linear-gradient(green, limegreen);
}

.toggle:checked ~ .switch .inner .disc {
  left: 30%;
}

.toggle:checked ~ .switch .inner .disc::before {
  content: 'ON';
  color: limegreen;
}