#nav-button.active .relative > div > div:nth-child(1) {
    transform: rotate(42deg);
    transition: all 0.3s;
}

#nav-button.active .relative > div > div:nth-child(2) {
    transform: translateX(-10px);
    transition: all 0.3s;
}

#nav-button.active .relative > div > div:nth-child(3) {
    transform: rotate(-42deg);
    transition: all 0.3s;
}