NavButton with animation

navButton.scss

.navigation {
  &__checkbox {
    display: none;
  }
  &__button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 100%;
    background: #303f8b;
    cursor: pointer;
  }

  &__button:hover &__icon::before {
    top: -1rem;
  }

  &__button:hover &__icon::after {
    top: 1rem;
  }

  // ICON
  &__icon {
    position: relative;
    &,
    &::before,
    &::after {
      display: inline-block;
      width: 3rem;
      height: 2px;
      border-radius: 2px;
      background-color: white;
    }

    &::before,
    &::after {
      content: '';
      position: absolute;
      left: 0;
      transition: all 0.2s;
    }

    &::before {
      top: -0.7rem;
    }

    &::after {
      top: 0.7rem;
    }
  }

  &__checkbox:checked + &__button &__icon {
    background-color: transparent;
  }

  &__checkbox:checked + &__button &__icon::before {
    top: 0;
    transform: rotate(135deg);
  }

  &__checkbox:checked + &__button &__icon::after {
    top: 0;
    transform: rotate(-135deg);
  }
}