<label class="radikalwp-tgl-retro"><input type="checkbox"><span class="radikalwp-tgl-retro-track"><span class="radikalwp-tgl-retro-knob"><//span><//span><//label>

.radikalwp-tgl-retro { display: inline-block; cursor: pointer; }
.radikalwp-tgl-retro input { position: absolute; opacity: 0; }
.radikalwp-tgl-retro-track {
  display: block;
  width: 60px;
  height: 30px;
  padding: 4px;
  background: #f5f0e6;
  border: 2px solid #44403c;
  border-radius: 6px;
  box-shadow: 3px 3px 0 #44403c;
  transition: background .25s ease;
}
.radikalwp-tgl-retro-knob {
  display: block;
  width: 22px;
  height: 22px;
  background: #44403c;
  border-radius: 3px;
  transition: transform .25s ease;
}
.radikalwp-tgl-retro input:checked + .radikalwp-tgl-retro-track { background: #f87171; }
.radikalwp-tgl-retro input:checked + .radikalwp-tgl-retro-track .radikalwp-tgl-retro-knob {
  transform: translateX(-30px);
  background: #fff5f5;
}