:root {
  --toggle-light: hsl(0, 0%, 81%);
  --toggle-dark: linear gradient hsl(210, 78%, 56%) to hsl(234, 19%, 10%);
}
/* O interruptor - a caixa ao redor do controle deslizante */
.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 30px;
}

/* esconde a borda de seleção do html padrão */
.switch input {
  opacity: 0;
}

/* o deslizador  */
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--toggle-light);
  transition: 0.4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 32px;
  bottom: 5px;
  background-color: #fff;
  transition: 0.4s;
}

input:checked + .slider {
  background: #484b6d;
}

input:checked + .slider:before {
  transform: translateX(-24px);
}
.slider,
.round {
  border-radius: 34px;
}

.round::before {
  border-radius: 50%;
}

input:checked + .round::before {
  background-color: hsl(230, 17%, 14%);
}