/* responsive.css */
@media (max-width: 1024px) {
    .section-heading {
        font-size: 1.8rem;
    }
    
    .section-subheading {
        font-size: 1.1rem;
    }
    
    .main-heading {
        font-size: 2.2rem;
    }
    
    .sub-heading {
        font-size: 1.1rem;
    }
    
    .mechanism, .tech {
        flex-direction: column;
    }
    
    .tech-image {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .site-header {
        padding: 10px 0; /* モバイル用にパディングを調整 */
    }
    
    .logo img {
        height: 50px; /* モバイル表示では少し小さく */
    }
    
    .main-nav {
        position: fixed;
        top: 70px; /* ヘッダーの高さに合わせて調整 */
        left: -100%;
        width: 80%;
        height: calc(100vh - 60px);
        background-color: var(--light);
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
        flex-direction: column;
        padding: 30px;
        transition: var(--transition);
        overflow-y: auto;
    }
    
    .main-nav.active {
        left: 0;
    }
    
    .main-nav ul {
        flex-direction: column;
        width: 100%;
    }
    
    .main-nav li {
        margin: 0 0 15px 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero-section .container {
        flex-direction: column;
    }
    
    .hero-content {
        padding-right: 0;
        margin-bottom: 30px;
        text-align: center;
    }
    
    .main-heading {
        font-size: 2rem;
    }
    
    .section-heading {
        font-size: 1.6rem;
    }
    
    .section-subheading {
        font-size: 1rem;
    }
    
    .trust-badges, .ortho-features, .reasons, .testimonials, .steps {
        grid-template-columns: 1fr;
    }
    
    .tech {
        flex-direction: column;
    }
    
    .tech-image {
        margin-bottom: 20px;
    }
    
    .mechanism {
        flex-direction: column;
    }
    
    .mechanism-illustration {
        margin-bottom: 30px;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: 100px 0 40px;
    }
    
    .main-heading {
        font-size: 1.8rem;
    }
    
    .sub-heading {
        font-size: 1rem;
    }
    
    .cta-button {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .parent-concerns {
        grid-template-columns: 1fr;
    }
    
    .section-heading {
        font-size: 1.5rem;
    }
    
    .benefit {
        min-width: 100%;
    }
    
    .key-benefits {
        flex-direction: column;
    }
    
    .country-badges {
        flex-direction: column;
        align-items: center;
    }
    
    .country {
        width: 80%;
    }
}