.navigation__checkbox {
    display: none;
}

.navigation__button {
    z-index: 2;
    position: fixed;
    top: 5rem;
    right: 5rem;
    width: 7rem;
    height: 7rem;
    border-radius: 50%;
}


.navigation__background {
    z-index: 1;
    position: fixed;
    top: 5rem;
    right: 5rem;
    width: 7rem;
    height: 7rem;
    border-radius: 50%;
    transition:transform 0.8s cubic-bezier(0.86, 0, 0.07, 1),-webkit-transform 0.8s cubic-bezier(0.86, 0, 0.07, 1)
}

.navigation__icon {
    position: relative;
    margin-top: 3.5rem;
}

.navigation__icon, 
.navigation__icon::before,
.navigation__icon::after {  
    display: inline-block;
    width: 3rem;
    height: 2px;
    left: 2rem;
}

.navigation__icon::after,
.navigation__icon::before {
    content: "";
    position: absolute;
    left: 0;
}

.navigation__icon::before {
    top: -.8rem;
}

.navigation__icon::after {
    top: .8rem;
}

.navigation__checkbox:checked ~ .navigation__background {
    -webkit-transform:scale(80);
    transform:scale(80)
}

/* Box shadow: x-index y-index, blur, color */
@media (prefers-color-scheme: dark) {
    .navigation__button {
        background-color: #333;
        box-shadow: 0 0rem 2rem rgba(255, 255, 255, 0.4);
    }

    .navigation__icon, 
    .navigation__icon::before,
    .navigation__icon::after { background-color: #e3e3e3;}

    .navigation__background { background-image: radial-gradient(#249A8A, #046D5F);}
    
}

@media (prefers-color-scheme: light) {
    .navigation__button {
        background-color: #fff;
        box-shadow: 0 0rem 2rem rgba(0,0,0,0.1);
    }

    .navigation__icon, 
    .navigation__icon::before,
    .navigation__icon::after { background-color: #121212;}
    
    .navigation__background { background-image: radial-gradient(#6FCBBE, #249A8A);}
    }