.header-shadow {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.nav-link {
    position: relative;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: #6c2bd9;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.mobile-menu {
    transform-origin: top;
    transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
}

.mobile-menu.open {
    transform: scaleY(1);
    opacity: 1;
}

.mobile-menu.closed {
    transform: scaleY(0);
    opacity: 0;
}