.mobile-nav-menu {
    position: fixed;
    top: 6rem; /* adjust based on header height */
    left: 0;
    width: 100%;
    height: calc(300px - 4rem);
    padding-top: 20px;
    background: white;
    overflow-y: auto;
    z-index: 40;
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
}

.mobile-nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}