.mobile-menu-btn {
    display: none;
    font-size: 1.6rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        background: white;
        padding: 1rem;
        border-radius: 1rem;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    }
    .nav-links.show {
        display: flex;
    }
    .mobile-menu-btn {
        display: block;
    }
    .navbar {
        flex-wrap: wrap;
    }
    .hero h1 {
        font-size: 1.8rem;
    }
    .container {
        padding: 2rem 1rem;
    }
    .section-title {
        font-size: 1.5rem;
    }
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }
}