/* Tablet */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .flow-diagram {
        flex-direction: column;
        align-items: center;
    }

    .flow-product-circle {
        margin-right: 0;
        margin-bottom: -20px;
        z-index: 10;
    }

    .flow-arrow-body {
        flex-wrap: wrap;
        height: auto;
        width: 100%;
        max-width: 500px;
    }

    .flow-box {
        flex: 0 0 33.333%;
        height: 90px;
        border-bottom: 2px solid rgba(255, 255, 255, 0.25);
    }

    .flow-box:first-child {
        padding-left: 18px;
    }

    .flow-box-result {
        flex: 0 0 100%;
        height: 60px;
    }

    .flow-box-result::after {
        display: none;
    }

    .flow-label,
    .flow-result-text {
        writing-mode: horizontal-tb;
        font-size: 0.8rem;
    }

    /* Cert table - tablet */
    .cert-table {
        grid-template-columns: repeat(2, 1fr);
    }

    .cert-body {
        min-height: 60px;
    }

    /* Cases - tablet */
    .cases-grid {
        gap: 20px;
    }

    .case-card {
        padding: 25px;
    }

    /* Countries - tablet */
    .countries-grid {
        gap: 20px;
    }

    /* Footer - tablet */
    .footer-top {
        gap: 40px;
    }

    .footer-columns {
        gap: 40px;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .site-header .container {
        height: 56px;
    }

    .main-nav {
        display: none;
        position: fixed;
        top: 56px;
        left: 0;
        right: 0;
        height: calc(100vh - 56px);
        height: calc(100dvh - 56px);
        background-color: rgba(255, 255, 255, 0.97);
        padding: 20px;
        backdrop-filter: blur(20px) saturate(180%);
        -webkit-backdrop-filter: blur(20px) saturate(180%);
        overflow-y: auto;
        transform: translateY(-10px);
        opacity: 0;
        transition: all 0.3s ease;
        z-index: 9999;
    }

    .main-nav.active {
        display: block;
        transform: translateY(0);
        opacity: 1;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 4px;
        background: transparent;
        padding: 0;
        border-radius: 0;
    }

    .main-nav li {
        border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    }

    .main-nav a {
        display: block;
        padding: 16px 12px;
        font-size: 1rem;
        border-radius: 10px;
        color: var(--color-dark);
    }

    .main-nav a::after {
        display: none;
    }

    .main-nav a:hover,
    .main-nav a:active {
        background: rgba(58, 122, 82, 0.08);
        color: var(--color-primary);
    }

    .main-nav a.active {
        background: var(--color-primary);
        color: var(--color-white);
    }

    .lang-switcher {
        display: none;
    }

    .mobile-lang-switcher {
        display: flex;
        gap: 8px;
        padding: 20px 12px 10px;
        border-top: 1px solid rgba(0, 0, 0, 0.08);
        margin-top: 12px;
        flex-wrap: wrap;
    }

    .mobile-lang-switcher a {
        color: var(--color-text-light);
        text-decoration: none;
        font-size: 0.85rem;
        padding: 8px 14px;
        border-radius: 6px;
        border: 1px solid rgba(0, 0, 0, 0.1);
        transition: all 0.2s ease;
    }

    .mobile-lang-switcher a.active {
        color: var(--color-primary);
        background: rgba(58, 122, 82, 0.08);
        border-color: var(--color-primary);
    }

    .mobile-menu-toggle {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        width: 44px;
        height: 44px;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 8px;
        transition: background 0.2s ease;
    }

    .mobile-menu-toggle:hover,
    .mobile-menu-toggle:active {
        background: rgba(255, 255, 255, 0.2);
    }

    .mobile-menu-toggle span {
        width: 20px;
        height: 2px;
        margin: 3px 0;
        transition: all 0.3s ease;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
        transform: scaleX(0);
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    body.menu-open {
        overflow: hidden;
    }

    main {
        padding-top: 56px;
    }

    /* Touch-friendly interactions */
    .touch-device .btn,
    .touch-device .service-item,
    .touch-device .about-item {
        -webkit-tap-highlight-color: transparent;
    }

    .touch-active {
        transform: scale(0.98) !important;
        opacity: 0.9;
    }

    .hero-bg {
        min-height: calc(100vh - 56px);
        min-height: calc(100dvh - 56px);
        padding: 60px 0 120px;
        display: flex;
        align-items: center;
    }

    .hero-content {
        margin-top: 0;
        padding: 30px 15px;
    }

    .hero-title {
        font-size: 1.8rem;
        margin-bottom: 20px;
    }

    .hero-subtitle {
        font-size: 0.95rem;
        margin-bottom: 35px;
    }

    .section-title {
        font-size: 1.3rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }

    .about-section,
    .solution-section,
    .company-section,
    .philosophy-section,
    .contact-section,
    .cert-section,
    .certflow-section,
    .joint-section,
    .cases-section,
    .compliance-section,
    .representative-section,
    .countries-section {
        padding: 50px 0;
    }

    .section-header .section-title {
        font-size: 1.4rem;
    }

    .section-header .section-subtitle {
        font-size: 1rem;
    }

    .services-bg {
        padding: 30px 15px;
        min-height: auto;
    }

    .services-card {
        padding: 30px 20px;
        border-radius: 12px;
    }

    .section-title-white {
        font-size: 1.2rem;
    }

    .service-item {
        padding: 16px;
        margin-bottom: 10px;
    }

    .service-item:hover {
        transform: none;
    }

    .challenge-section {
        padding: 50px 0;
    }

    .solution-bg {
        padding: 50px 0;
    }

    .solution-box {
        flex-direction: column;
        padding: 20px;
    }

    .flow-product-circle {
        width: 100px;
        height: 100px;
    }

    .flow-arrow-body {
        max-width: 100%;
    }

    .flow-box {
        flex: 0 0 50%;
        height: 70px;
        padding: 0 10px;
    }

    .flow-box:first-child {
        padding-left: 10px;
    }

    .flow-label,
    .flow-result-text {
        font-size: 0.7rem;
    }

    .company-content {
        padding: 20px 15px;
    }

    .company-table th,
    .company-table td {
        display: block;
        width: 100%;
        padding: 10px 15px;
    }

    .company-table th {
        border-bottom: none;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .contact-form {
        padding: 25px 20px;
        margin: 25px 10px 0;
        border-radius: 12px;
    }

    .form-group input,
    .form-group textarea {
        padding: 14px 16px;
        font-size: 16px; /* Prevents iOS zoom */
    }

    .btn {
        width: 100%;
        padding: 16px 30px;
        font-size: 1rem;
        min-height: 52px;
    }

    /* Footer - mobile */
    .footer-top {
        flex-direction: column;
        gap: 30px;
    }

    .footer-columns {
        flex-direction: column;
        gap: 24px;
    }

    /* Cert section - mobile */
    .cert-table {
        grid-template-columns: repeat(2, 1fr);
    }

    .cert-header {
        font-size: 0.85rem;
        padding: 10px 8px;
    }

    .cert-body {
        font-size: 0.8rem;
        padding: 12px 8px;
        min-height: auto;
    }

    .cert-data {
        padding: 18px 15px;
    }

    .cert-data-label {
        font-size: 0.9rem;
    }

    .cert-data-text {
        font-size: 0.85rem;
    }

    /* Representative - mobile */
    .rep-table-wrapper {
        margin-top: 20px;
    }

    .rep-table {
        min-width: 600px;
    }

    /* Philosophy - mobile */
    .phil-quote-box {
        padding: 25px 20px;
    }

    .phil-quote-text {
        font-size: 1.05rem;
    }

    .phil-values-grid {
        grid-template-columns: 1fr 1fr;
        gap: 15px;
    }

    .phil-mv-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .phil-corp-grid {
        grid-template-columns: 1fr;
    }

    /* Joint section - mobile */
    .joint-role {
        flex-direction: column;
        gap: 8px;
        padding: 15px;
    }

    .joint-label {
        min-width: auto;
        align-self: flex-start;
    }

    .joint-colon {
        display: none;
    }

    .joint-value-box {
        padding: 20px 15px;
    }

    .joint-value-box p {
        font-size: 1rem;
    }

    /* Cases - mobile */
    .cases-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .case-card {
        padding: 20px;
    }

    .case-details {
        grid-template-columns: 70px 1fr;
        gap: 8px 12px;
    }

    /* Countries - mobile */
    .countries-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .countries-card {
        padding: 25px 20px;
    }

    /* Compliance - mobile */
    .compliance-list {
        padding: 8px 15px;
    }

    .compliance-item {
        flex-direction: column;
        gap: 4px;
        padding: 12px 0;
    }

    .compliance-item dt {
        min-width: auto;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .hero-cta {
        flex-direction: column;
        gap: 10px;
        align-items: center;
    }

    .hero-cta .btn {
        width: 80%;
    }

    .container {
        padding: 0 15px;
    }

    .flow-diagram {
        flex-direction: column;
        align-items: stretch;
    }

    .flow-product-circle {
        width: 80px;
        height: 80px;
        margin: 0 auto -15px;
    }

    .flow-arrow-body {
        flex-direction: column;
        height: auto;
        width: 100%;
        max-width: 100%;
    }

    .flow-box {
        flex: none;
        width: 100%;
        height: auto;
        padding: 12px 16px;
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        position: relative;
    }

    .flow-box:first-child {
        padding-left: 16px;
    }

    .flow-box::after {
        content: '';
        position: absolute;
        right: 16px;
        top: 50%;
        transform: translateY(-50%);
        width: 0;
        height: 0;
        border-left: 6px solid rgba(255, 255, 255, 0.5);
        border-top: 4px solid transparent;
        border-bottom: 4px solid transparent;
    }

    .flow-box:last-child::after {
        display: none;
    }

    .flow-label,
    .flow-result-text {
        writing-mode: horizontal-tb;
        font-size: 0.78rem;
    }

    .flow-box-result {
        border-bottom: none;
    }

    .flow-box-result::after {
        display: none;
    }

    .about-item {
        padding: 20px 15px;
    }

    .about-item:hover {
        transform: none;
    }

    /* Cert table - small mobile */
    .cert-table {
        grid-template-columns: 1fr;
    }

    .cert-col {
        border-bottom: 1px solid var(--color-border);
    }

    .cert-col:last-child {
        border-bottom: none;
    }

    .cert-header {
        border-right: none;
    }

    .cert-body {
        border-right: none;
    }

    /* Cases - small mobile */
    .case-details {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .case-details dt {
        padding-top: 8px;
    }

    .case-details dt:first-child {
        padding-top: 0;
    }
}

/* Animations on reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .fade-in,
    .fade-in-left,
    .fade-in-right,
    .scale-in {
        opacity: 1;
        transform: none;
    }

    html {
        scroll-behavior: auto;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-border: #333333;
    }

    .btn-primary {
        border: 2px solid var(--color-white);
    }

    .form-group input,
    .form-group textarea {
        border-width: 2px;
    }
}