.hamburger {
    display: none;
    cursor: pointer;
    width: 30px;
    height: 20px;
    position: relative;
    margin-left: 20px;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: #1f2937;
    position: absolute;
    transition: all 0.3s ease;
}

.hamburger span:first-child {
    top: 0;
}

.hamburger span:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}

.hamburger span:last-child {
    bottom: 0;
}

.hamburger.active span:first-child {
    transform: translateY(9px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:last-child {
    transform: translateY(-9px) rotate(-45deg);
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }
}