.navbar {
    background-color: #F8F8F8;
    z-index: 1000;
    top: 0;
    right: 0;
    left: 0;
    position: fixed;
}

.nav-link {
    color: var(--nero);
    font-size: 18px;
}

.nav-link:hover {
    color: var(--principale);
}

#bars {
    width: 28px;
    height: 28px;
    position: relative;
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
    -webkit-transition: .5s ease-in-out;
    -moz-transition: .5s ease-in-out;
    -o-transition: .5s ease-in-out;
    transition: .5s ease-in-out;
    cursor: pointer;
}

#bars span {
    display: block;
    position: absolute;
    height: 4px;
    width: 100%;
    background: var(--principale);
    border-radius: 2px;
    opacity: 1;
    left: 0;
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
    -webkit-transition: .25s ease-in-out;
    -moz-transition: .25s ease-in-out;
    -o-transition: .25s ease-in-out;
    transition: .25s ease-in-out;
}

#bars span:nth-child(1) {
    top: 5px;
    -webkit-transform-origin: left center;
    -moz-transform-origin: left center;
    -o-transform-origin: left center;
    transform-origin: left center;
}

#bars span:nth-child(2) {
    bottom: 5px;
    -webkit-transform-origin: left center;
    -moz-transform-origin: left center;
    -o-transform-origin: left center;
    transform-origin: left center;
}

#bars.open span:nth-child(1) {
    -webkit-transform: rotate(45deg);
    -moz-transform: rotate(45deg);
    -o-transform: rotate(45deg);
    transform: rotate(45deg);
    top: 2px;
    left: 4px;
    background: var(--principale);
}

#bars.open span:nth-child(2) {
    -webkit-transform: rotate(-45deg);
    -moz-transform: rotate(-45deg);
    -o-transform: rotate(-45deg);
    transform: rotate(-45deg);
    bottom: 2px;
    left: 4px;
    background: var(--principale);
}

@media (max-width:767px) {
    #logo {
        width: 90px;
    }

}

@media (min-width:768px) {
    #logo {
        width: 120px;
    }

}