:root {
  --hue: 223;
  --bg: hsl(var(--hue), 10%, 90%);
  --fg: hsl(var(--hue), 10%, 10%);
  --primary: hsl(var(--hue), 90%, 50%);
  --trans-dur: 0.3s;
  --trans-timing: cubic-bezier(0.76, 0.05, 0.24, 0.95);
  --trans-timing-in: cubic-bezier(0.76, 0.05, 0.86, 0.06);
  --trans-timing-out: cubic-bezier(0.05, 0.76, 0.06, 0.86);
  /* font-size: calc(40px + (80 - 40) * (100vw - 320px) / (2560 - 320)); */
}

.switch {
  margin: auto;
  position: relative;
}
.switch__icon,
.switch__input {
  display: block;
}

.switch__input {
  background-color: #D3D3D4;
  border-radius: 0.75em;
  outline: transparent;
  position: relative;
  width: 3em;
  height: 1.5em;
  -webkit-appearance: none;
  appearance: none;
  -webkit-tap-highlight-color: transparent;
  transition: background-color var(--trans-dur) var(--trans-timing), box-shadow 0.15s linear;
}

.switch__input:before,
.switch__input:after {
  content: "";
  display: block;
  position: absolute;
}
.switch__input:before {
  background-color: #D3D3D4;
  border-radius: inherit;
  mask-image: linear-gradient(120deg, hsl(0, 0%, 0%) 20%, hsla(0, 0%, 0%, 0) 80%);
  -webkit-mask-image: linear-gradient(120deg, hsl(0, 0%, 0%) 20%, hsla(0, 0%, 0%, 0) 80%);
  inset: 0;
  transition: background-color var(--trans-dur) var(--trans-timing);
}
.switch__input:after {
  background-color: hsl(0, 0%, 100%);
  border-radius: 50%;
  box-shadow: 0.05em 0.05em 0.05em hsla(var(--hue), 90%, 10%, 0.1);
  top: 0.125em;
  left: 0.125em;
  width: 1.25em;
  height: 1.25em;
  transition: background-color var(--trans-dur) var(--trans-timing), transform var(--trans-dur) var(--trans-timing);
  z-index: 1;
}
.switch__input:checked {
  background-color: #3B3B3F;
}
.switch__input:checked:before {
  background-color: #3B3B3F;
}
.switch__input:checked:after {
  background-color: #D3D3D4;
  transform: translateX(1.5em);
}
.switch__input:checked ~ .switch__icon--light,
.switch__input:checked ~ .switch__icon--light polyline {
  transition-delay: 0s;
  transition-timing-function: var(--trans-timing-in);
}
.switch__input:checked ~ .switch__icon--light {
  opacity: 0;
  transform: translateX(-0.75em) rotate(-30deg) scale(0.75);
}
.switch__input:checked ~ .switch__icon--light polyline {
  stroke-dashoffset: 1.5;
}
.switch__input:checked ~ .switch__icon--dark {
  opacity: 1;
  transform: translateX(-1.5em);
  transition-delay: calc(var(--trans-dur) / 2);
  transition-timing-function: var(--trans-timing-out);
}
.switch__sr {
  overflow: hidden;
  position: absolute;
  width: 1px;
  height: 1px;
 
}