.mobile-menu-btn {
    display: none;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 0;
    background: transparent;
    color: #1a1a1a;
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
}

@media (max-width: 768px) {
    .nav-container { position: relative; }
    .mobile-menu-btn { display: block; flex: 0 0 44px; }
    .nav-links { display: none; }
    .nav-links.is-open {
        display: flex;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        margin: 0;
        padding: 8px 16px;
        background: #fff;
        border-top: 1px solid #e5e7eb;
        box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
    }
    .nav-links.is-open a { display: block; padding: 12px 0; }
}