<label class="radikalwp-tg-slim"><input type="checkbox"><span class="radikalwp-tg-slim-track"><span class="radikalwp-tg-slim-knob"><//span><//span><//label>

.radikalwp-tg-slim { display: inline-flex; cursor: pointer; }
.radikalwp-tg-slim input { display: none; }
.radikalwp-tg-slim-track {
  display: block;
  width: 44px;
  height: 20px;
  padding: 2px;
  background: #e2e8f0;
  border-radius: 999px;
  transition: background .25s ease;
}
.radikalwp-tg-slim-knob {
  display: block;
  width: 16px;
  height: 16px;
  background: #fff;
  border-radius: 6px;
  box-shadow: 0 1px 4px rgba(15, 23, 42, .25);
  transition: transform .25s ease, background .25s ease;
}
.radikalwp-tg-slim input:checked + .radikalwp-tg-slim-track { background: #0ea5e9; }
.radikalwp-tg-slim input:checked + .radikalwp-tg-slim-track .radikalwp-tg-slim-knob {
  background: #075985;
  transform: translateX(-24px);
}