#hamburger {
    align-self: center;
    width: 31px;
    height: 23px;
    position: relative;
    right: 0;
    top: 0;
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
    -webkit-transition: .4s ease-in-out;
    -moz-transition: .4s ease-in-out;
    -o-transition: .4s ease-in-out;
    transition: .4s ease-in-out;
    cursor: pointer;
    z-index: 12;
}

#hamburger span {
    display: block;
    position: absolute;
    height: 3px;
    width: 100%;
    background: var(--bs-body-color);
    opacity: 1;
    left: 0;
    -webkit-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
    -webkit-transition: .4s ease-in-out;
    -moz-transition: .4s ease-in-out;
    -o-transition: .4s ease-in-out;
    transition: .4s ease-in-out;
}

#hamburger span:nth-child(1) {
    top: 0;
}

#hamburger span:nth-child(2),
#hamburger span:nth-child(3) {
    top: 8px;
}

#hamburger span:nth-child(4) {
    top: 16px;
}

#hamburger.open span:nth-child(1) {
    top: 16px;
    width: 0;
    left: 50%;
}

#hamburger.open span:nth-child(2) {
    -webkit-transform: rotate(45deg);
    -moz-transform: rotate(45deg);
    -o-transform: rotate(45deg);
    transform: rotate(45deg);
}

#hamburger.open span:nth-child(3) {
    -webkit-transform: rotate(-45deg);
    -moz-transform: rotate(-45deg);
    -o-transform: rotate(-45deg);
    transform: rotate(-45deg);
}

#hamburger.open span:nth-child(4) {
    top: 16px;
    width: 0;
    left: 50%;
}

@media (min-width: 1200px) {
    #hamburger { display: none; }
}