<label class="radikalwp-tgl-theme"><input type="checkbox"><span class="radikalwp-tgl-theme-track"><span class="radikalwp-tgl-theme-icon radikalwp-tgl-theme-icon--sun">☀️<//span><span class="radikalwp-tgl-theme-icon radikalwp-tgl-theme-icon--moon">🌙<//span><span class="radikalwp-tgl-theme-knob"><//span><//span><//label>

.radikalwp-tgl-theme { display: inline-block; cursor: pointer; }
.radikalwp-tgl-theme input { position: absolute; opacity: 0; }
.radikalwp-tgl-theme-track {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 74px;
  height: 34px;
  padding: 0 10px;
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  border-radius: 999px;
  transition: background .4s ease;
}
.radikalwp-tgl-theme-icon {
  font-size: 14px;
  transition: opacity .35s ease, transform .5s ease;
}
.radikalwp-tgl-theme-icon--moon {
  opacity: 0;
  transform: rotate(-90deg) scale(.5);
}
.radikalwp-tgl-theme-knob {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 26px;
  height: 26px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, .25);
  transition: transform .4s cubic-bezier(.34, 1.56, .64, 1);
}
.radikalwp-tgl-theme input:checked + .radikalwp-tgl-theme-track {
  background: linear-gradient(135deg, #312e81, #1e1b4b);
}
.radikalwp-tgl-theme input:checked + .radikalwp-tgl-theme-track .radikalwp-tgl-theme-icon--sun {
  opacity: 0;
  transform: rotate(90deg) scale(.5);
}
.radikalwp-tgl-theme input:checked + .radikalwp-tgl-theme-track .radikalwp-tgl-theme-icon--moon {
  opacity: 1;
  transform: rotate(0) scale(1);
}
.radikalwp-tgl-theme input:checked + .radikalwp-tgl-theme-track .radikalwp-tgl-theme-knob {
  transform: translateX(-40px);
}