/* ===== RESPONSIVE DESIGN ===== */

/* Extra Large Devices (1400px and up) */
@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }
    
    .hero-title {
        font-size: 4.5rem;
    }
    
    .section-title {
        font-size: 3rem;
    }
}

/* Large Devices (1200px and up) */
@media (max-width: 1199.98px) {
    .container {
        max-width: 960px;
    }
    
    .steps-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    
    .services-grid {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    }
}

/* Medium Devices (992px and up) */
@media (max-width: 991.98px) {
    .container {
        max-width: 720px;
    }
    
    /* Header */
    .nav-menu {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white);
        border-top: 1px solid var(--gray-200);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        z-index: var(--z-dropdown);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        padding: var(--spacing-4) 0;
        gap: 0;
    }
    
    .nav-item {
        border-bottom: 1px solid var(--gray-100);
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-4) var(--spacing-6);
        color: var(--gray-700);
    }
    
    .nav-link::after {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-actions {
        gap: var(--spacing-2);
    }
    
    .btn-primary {
        padding: var(--spacing-2) var(--spacing-4);
        font-size: var(--font-size-sm);
    }
    
    /* Hero */
    .hero-title {
        font-size: var(--font-size-5xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-illustration {
        display: none;
    }
    
    .hero-stats {
        gap: var(--spacing-4);
    }
    
    .stat {
        padding: var(--spacing-3) var(--spacing-4);
    }
    
    .stat-number {
        font-size: var(--font-size-2xl);
    }
    
    /* Sections */
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .how-it-works-illustration {
        margin-bottom: var(--spacing-8);
    }
    
    .how-it-works-illustration img {
        max-width: 90%;
    }
    
    .steps-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: var(--spacing-6);
    }
    
    .services-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: var(--spacing-6);
    }
    
    .partners-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--spacing-6);
    }
    
    /* Security Section */
    .security-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-12);
    }
    
    .security-image {
        order: -1;
    }
    
    /* ADAM AI Section */
    .adam-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-12);
    }
    
    .adam-features {
        grid-template-columns: 1fr;
        gap: var(--spacing-4);
    }
    
    .adam-image {
        order: -1;
    }
    
    /* Contact Section */
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-12);
    }
    
    /* Newsletter */
    .newsletter-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-6);
    }
    
    .newsletter-form form {
        flex-direction: column;
        align-items: center;
    }
    
    .newsletter-form input {
        min-width: 100%;
        margin-bottom: var(--spacing-3);
    }
}

/* Small Devices (768px and up) */
@media (max-width: 767.98px) {
    .container {
        max-width: 540px;
        padding: 0 var(--spacing-3);
    }
    
    /* Typography */
    h1 { font-size: var(--font-size-4xl); }
    h2 { font-size: var(--font-size-3xl); }
    h3 { font-size: var(--font-size-2xl); }
    
    /* Header */
    .navbar {
        padding: var(--spacing-3) 0;
    }
    
    .nav-brand .logo {
        height: 35px;
    }
    
    .nav-actions {
        gap: var(--spacing-2);
    }
    
    .btn-login {
        padding: var(--spacing-1) var(--spacing-3);
        font-size: var(--font-size-xs);
    }
    
    .language-selector .lang-btn {
        padding: var(--spacing-1) var(--spacing-2);
        font-size: var(--font-size-xs);
    }
    
    /* Hero */
    .hero {
        height: auto;
        min-height: auto;
        page-break-after: always;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
        margin-bottom: var(--spacing-4);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-6);
    }
    
    .btn-large {
        padding: var(--spacing-3) var(--spacing-6);
        font-size: var(--font-size-base);
    }
    
    /* Sections */
    section {
        padding: var(--spacing-16) 0;
    }
    
    .section-header {
        margin-bottom: var(--spacing-12);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-3);
    }
    
    .section-subtitle {
        font-size: var(--font-size-base);
    }
    
    /* Steps */
    .steps-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
    }
    
    .step-card {
        padding: var(--spacing-6);
    }
    
    .step-icon {
        width: 60px;
        height: 60px;
        font-size: var(--font-size-xl);
    }
    
    .step-number {
        width: 30px;
        height: 30px;
        font-size: var(--font-size-base);
    }
    
    /* Services */
    .services-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
        margin-bottom: var(--spacing-8);
    }
    
    .service-card {
        padding: var(--spacing-6);
    }
    
    .service-icon {
        width: 50px;
        height: 50px;
        font-size: var(--font-size-lg);
    }
    
    /* Partners */
    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-4);
        margin-bottom: var(--spacing-8);
        justify-items: center;
    }
    
    .partner-logo {
        padding: var(--spacing-4);
        min-height: 60px;
        width: 100%;
        max-width: 140px;
        display: flex !important;
        align-items: center;
        justify-content: center;
    }
    
    .partner-logo img {
        display: block !important;
        opacity: 0.8 !important;
        min-width: 70px;
    }
    
    /* Security */
    .security-features {
        margin: var(--spacing-6) 0;
    }
    
    .security-feature {
        margin-bottom: var(--spacing-4);
    }
    
    .feature-icon {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-base);
    }
    
    /* ADAM AI Section */
    .adam-features {
        grid-template-columns: 1fr;
        gap: var(--spacing-4);
        margin: var(--spacing-6) 0;
    }
    
    .adam-feature {
        padding: var(--spacing-3);
        display: block !important;
        visibility: visible !important;
        opacity: 1 !important;
    }
    
    .adam-feature h3,
    .adam-feature p {
        display: block !important;
        visibility: visible !important;
        opacity: 1 !important;
    }
    
    .adam-feature .feature-icon {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-base);
        display: flex !important;
        visibility: visible !important;
    }
    
    .adam-image img {
        width: 150px;
        height: 150px;
    }
    
    .floating-element {
        width: 30px;
        height: 30px;
        font-size: 12px;
    }
    
    /* Testimonials */
    .testimonials-slider {
        margin-bottom: var(--spacing-6);
    }
    
    .testimonial-card {
        padding: var(--spacing-6);
    }
    
    .testimonial-author {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-3);
    }
    
    .testimonial-author img {
        width: 50px;
        height: 50px;
    }
    
    .testimonials-nav {
        margin-bottom: var(--spacing-6);
    }
    
    .nav-btn {
        width: 35px;
        height: 35px;
    }
    
    /* FAQ */
    .faq-list {
        margin-bottom: var(--spacing-8);
    }
    
    .faq-question {
        padding: var(--spacing-4);
    }
    
    .faq-question h3 {
        font-size: var(--font-size-base);
    }
    
    .faq-answer p {
        padding: 0 var(--spacing-4) var(--spacing-4);
    }
    
    /* Contact */
    .contact-item {
        margin-bottom: var(--spacing-4);
    }
    
    .contact-icon {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-base);
    }
    
    .contact-form {
        padding: var(--spacing-6);
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .social-links {
        justify-content: center;
    }
    
    /* Newsletter */
    .newsletter-text h2 {
        font-size: var(--font-size-2xl);
    }
    
    /* Footer */
    .footer {
        padding: var(--spacing-12) 0 var(--spacing-6);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-6);
        margin-bottom: var(--spacing-6);
    }
    
    .footer-section {
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    /* Mobile video optimizations */
    .hero-video-container {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        overflow: hidden;
    }
    
    .hero-video {
        position: absolute;
        top: 50%;
        left: 50%;
        min-width: 100%;
        min-height: 100%;
        width: auto;
        height: auto;
        transform: translate(-50%, -50%);
        object-fit: cover;
        /* Mobile performance optimizations */
        will-change: transform;
        transform-origin: center center;
    }
    
    .hero-video-overlay {
        background: rgba(0, 0, 0, 0.4);
    }
    
    /* Reduce video quality on mobile for better performance */
    .hero-video {
        filter: brightness(0.9) contrast(1.1);
    }
    
    /* Video Modal Responsive */
    .video-modal-content {
        width: 95%;
        max-height: 95vh;
        margin: 10px;
    }
    
    .video-modal-header {
        padding: var(--spacing-4);
    }
    
    .video-modal-header h2 {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-3);
    }
    
    .video-language-tabs {
        gap: var(--spacing-1);
    }
    
    .lang-tab {
        padding: var(--spacing-1) var(--spacing-3);
        font-size: var(--font-size-xs);
    }
    
    .video-container {
        padding: var(--spacing-4);
    }
    
    .video-container video {
        max-width: 100%;
    }
    
    .video-modal-footer {
        padding: var(--spacing-4);
    }
}

/* Extra Small Devices (576px and down) */
@media (max-width: 575.98px) {
    .container {
        padding: 0 var(--spacing-2);
    }
    
    /* Typography */
    h1 { font-size: var(--font-size-3xl); }
    h2 { font-size: var(--font-size-2xl); }
    h3 { font-size: var(--font-size-xl); }
    
    /* Header */
    .navbar {
        padding: var(--spacing-2) 0;
    }
    
    .nav-brand .logo {
        height: 30px;
    }
    
    .nav-actions {
        gap: var(--spacing-1);
    }
    
    .btn-primary {
        padding: var(--spacing-1) var(--spacing-3);
        font-size: var(--font-size-xs);
    }
    
    .btn-login {
        display: none; /* Hide login button on very small screens */
    }
    
    .language-selector .lang-btn {
        padding: var(--spacing-1);
    }
    
    .language-selector .lang-btn span {
        display: none; /* Hide text, show only icon */
    }
    
    /* Hero */
    .hero {
        height: auto;
        min-height: auto;
        page-break-after: always;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
        margin-bottom: var(--spacing-3);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-sm);
        margin-bottom: var(--spacing-4);
    }
    
    .btn-large {
        padding: var(--spacing-2) var(--spacing-4);
        font-size: var(--font-size-sm);
    }
    
    .hero-badge {
        font-size: var(--font-size-xs);
        padding: var(--spacing-1) var(--spacing-3);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-3);
    }
    
    .stat {
        padding: var(--spacing-2) var(--spacing-3);
    }
    
    .stat-number {
        font-size: var(--font-size-xl);
    }
    
    .stat-label {
        font-size: var(--font-size-xs);
    }
    
    /* Sections */
    section {
        padding: var(--spacing-12) 0;
    }
    
    .section-header {
        margin-bottom: var(--spacing-8);
    }
    
    .section-title {
        font-size: var(--font-size-xl);
    }
    
    .section-subtitle {
        font-size: var(--font-size-sm);
    }
    
    /* Steps */
    .step-card {
        padding: var(--spacing-4);
    }
    
    .step-icon {
        width: 50px;
        height: 50px;
        font-size: var(--font-size-lg);
    }
    
    .step-number {
        width: 25px;
        height: 25px;
        font-size: var(--font-size-sm);
        top: var(--spacing-2);
        right: var(--spacing-2);
    }
    
    /* Services */
    .service-card {
        padding: var(--spacing-4);
    }
    
    .service-icon {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-base);
    }
    
    /* Partners */
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-4);
        justify-items: center;
    }
    
    .partner-logo {
        padding: var(--spacing-4);
        min-height: 60px;
        width: 100%;
        max-width: 150px;
        display: flex !important;
        align-items: center;
        justify-content: center;
    }
    
    .partner-logo img {
        display: block !important;
        opacity: 0.8 !important;
        min-width: 80px;
    }
    
    /* Security */
    .security-feature {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-2);
    }
    
    .feature-icon {
        width: 35px;
        height: 35px;
        font-size: var(--font-size-sm);
        margin: 0 auto;
    }
    
    /* ADAM AI Section */
    .adam-feature {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-2);
        padding: var(--spacing-3);
        display: flex !important;
        visibility: visible !important;
        opacity: 1 !important;
    }
    
    .adam-feature h3,
    .adam-feature p {
        display: block !important;
        visibility: visible !important;
        opacity: 1 !important;
    }
    
    .adam-feature .feature-icon {
        width: 35px;
        height: 35px;
        font-size: var(--font-size-sm);
        margin: 0 auto;
        display: flex !important;
        visibility: visible !important;
    }
    
    .adam-image img {
        width: 120px;
        height: 120px;
    }
    
    .floating-element {
        width: 25px;
        height: 25px;
        font-size: 10px;
    }
    
    /* Testimonials */
    .testimonial-card {
        padding: var(--spacing-4);
    }
    
    .testimonial-content p {
        font-size: var(--font-size-base);
    }
    
    .stars {
        font-size: var(--font-size-base);
    }
    
    .nav-btn {
        width: 30px;
        height: 30px;
        font-size: var(--font-size-sm);
    }
    
    .dot {
        width: 8px;
        height: 8px;
    }
    
    /* FAQ */
    .faq-question {
        padding: var(--spacing-3);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-2);
    }
    
    .faq-question h3 {
        font-size: var(--font-size-sm);
    }
    
    .faq-answer p {
        padding: 0 var(--spacing-3) var(--spacing-3);
        font-size: var(--font-size-sm);
    }
    
    /* Contact */
    .contact-item {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-2);
    }
    
    .contact-icon {
        width: 35px;
        height: 35px;
        font-size: var(--font-size-sm);
        margin: 0 auto;
    }
    
    .contact-form {
        padding: var(--spacing-4);
    }
    
    .form-group {
        margin-bottom: var(--spacing-3);
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: var(--spacing-2);
        font-size: var(--font-size-sm);
    }
    
    .social-link {
        width: 35px;
        height: 35px;
        font-size: var(--font-size-sm);
    }
    
    /* Newsletter */
    .newsletter {
        padding: var(--spacing-8) 0;
    }
    
    .newsletter-text h2 {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-2);
    }
    
    .newsletter-text p {
        font-size: var(--font-size-sm);
    }
    
    .newsletter-form input {
        padding: var(--spacing-2) var(--spacing-3);
        font-size: var(--font-size-sm);
    }
    
    .newsletter-form button {
        padding: var(--spacing-2) var(--spacing-4);
        font-size: var(--font-size-sm);
    }
    
    /* Footer */
    .footer {
        padding: var(--spacing-8) 0 var(--spacing-4);
    }
    
    .footer-content {
        gap: var(--spacing-4);
        margin-bottom: var(--spacing-4);
    }
    
    .footer-section h3 {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-2);
    }
    
    .footer-section p,
    .footer-links a {
        font-size: var(--font-size-sm);
    }
    
    .footer-logo img {
        height: 30px;
        margin-bottom: var(--spacing-2);
    }
    
    .footer-social .social-link {
        width: 30px;
        height: 30px;
        font-size: var(--font-size-xs);
    }
    
    .footer-bottom {
        padding-top: var(--spacing-4);
        font-size: var(--font-size-xs);
    }
    
    /* Modal */
    .modal-content {
        padding: var(--spacing-6);
        margin: var(--spacing-4);
    }
    
    .login-form h2 {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-4);
    }
    
    .form-group input {
        padding: var(--spacing-2);
        font-size: var(--font-size-sm);
    }
    
    /* Back to top */
    .back-to-top {
        width: 40px;
        height: 40px;
        bottom: var(--spacing-4);
        right: var(--spacing-4);
        font-size: var(--font-size-sm);
    }
    
    /* Further optimize for very small screens */
    .hero-video {
        transform: translate(-50%, -50%) scale(1.1);
    }
    
    .hero-video-overlay {
        background: rgba(0, 0, 0, 0.5);
    }
    
    .video-modal-content {
        width: 98%;
        margin: 5px;
    }
    
    .video-language-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .lang-tab {
        width: 100%;
        max-width: 200px;
        text-align: center;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: var(--spacing-3);
    }
    
    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }
}

/* Landscape orientation for mobile devices */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        height: 100vh;
        min-height: auto;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-2);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-sm);
        margin-bottom: var(--spacing-3);
    }
    
    .hero-actions {
        gap: var(--spacing-2);
    }
    
    .btn-large {
        padding: var(--spacing-2) var(--spacing-4);
        font-size: var(--font-size-sm);
    }
    
    /* Landscape mobile optimizations */
    .hero-video {
        transform: translate(-50%, -50%) scale(1.2);
    }
    
    .hero-video-overlay {
        background: rgba(0, 0, 0, 0.6);
    }
}

/* Print styles */
@media print {
    .header,
    .back-to-top,
    .modal,
    #loading-screen {
        display: none !important;
    }
    
    .hero {
        height: auto;
        min-height: auto;
        page-break-after: always;
    }
    
    .hero-video,
    .hero-overlay {
        display: none;
    }
    
    .hero-content {
        color: var(--gray-900) !important;
    }
    
    section {
        padding: var(--spacing-8) 0;
        page-break-inside: avoid;
    }
    
    .btn {
        border: 1px solid var(--gray-400) !important;
        background: transparent !important;
        color: var(--gray-900) !important;
    }
    
    .testimonials-slider .testimonial-card {
        display: block !important;
        page-break-inside: avoid;
    }
    
    .testimonials-nav,
    .testimonials-dots {
        display: none;
    }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .hero-video {
        transform: scale(1.1);
    }
    
    .partner-logo img,
    .testimonial-author img,
    .footer-logo img,
    .nav-brand .logo {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    .hero-video {
        display: none;
    }
    
    .hero-background::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        z-index: -1;
    }
    
    .spinner {
        animation: none;
        border: 4px solid var(--primary-color);
        border-radius: 50%;
    }
    
    .step-card:hover,
    .service-card:hover,
    .partner-logo:hover,
    .btn:hover,
    .social-link:hover,
    .back-to-top:hover {
        transform: none;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --white: #1a1a1a;
        --gray-50: #2a2a2a;
        --gray-100: #3a3a3a;
        --gray-200: #4a4a4a;
        --gray-300: #5a5a5a;
        --gray-400: #6a6a6a;
        --gray-500: #7a7a7a;
        --gray-600: #8a8a8a;
        --gray-700: #9a9a9a;
        --gray-800: #aaaaaa;
        --gray-900: #ffffff;
        --black: #ffffff;
    }
    
    .header {
        background-color: rgba(26, 26, 26, 0.95);
        border-bottom-color: var(--gray-200);
    }
    
    .modal-content,
    .step-card,
    .service-card,
    .partner-logo,
    .testimonial-card,
    .faq-item,
    .contact-form {
        background-color: var(--gray-50);
        border-color: var(--gray-200);
    }
    
    .hero-overlay {
        background: linear-gradient(135deg, rgba(37, 99, 235, 0.9), rgba(16, 185, 129, 0.7));
    }
}

/* Focus visible for better accessibility */
@supports selector(:focus-visible) {
    button:focus,
    input:focus,
    select:focus,
    textarea:focus,
    a:focus {
        outline: none;
    }
    
    button:focus-visible,
    input:focus-visible,
    select:focus-visible,
    textarea:focus-visible,
    a:focus-visible {
        outline: 2px solid var(--primary-color);
        outline-offset: 2px;
    }
}

/* Container queries for modern browsers */
@supports (container-type: inline-size) {
    .services-grid {
        container-type: inline-size;
    }
    
    @container (max-width: 600px) {
        .service-card {
            padding: var(--spacing-4);
        }
        
        .service-icon {
            width: 40px;
            height: 40px;
        }
    }
}

/* Hover support detection */
@media (hover: hover) and (pointer: fine) {
    .step-card:hover,
    .service-card:hover,
    .partner-logo:hover {
        transform: translateY(-5px);
    }
    
    .btn:hover {
        transform: translateY(-1px);
    }
    
    .social-link:hover {
        transform: translateY(-2px);
    }
    
    .back-to-top:hover {
        transform: translateY(-2px);
    }
}

/* No hover support (touch devices) */
@media (hover: none) and (pointer: coarse) {
    .step-card,
    .service-card,
    .partner-logo,
    .btn,
    .social-link,
    .back-to-top {
        transition: none;
    }
    
    .step-card:active,
    .service-card:active,
    .btn:active {
        transform: scale(0.98);
    }
}

/* Data saver mode */
@media (prefers-reduced-data: reduce) {
    .hero-video {
        display: none;
    }
    
    .hero-background::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        z-index: -3;
    }
}