/* ==========================================================================
   ePOC Responsive Design System - Mobile-First Approach
   ========================================================================== */

/* Large Desktop (1200px+) */
@media (max-width: 1400px) {
    .container {
        max-width: 1200px;
    }
}

/* Desktop (992px - 1199px) */
@media (max-width: 1200px) {
    .hero-grid {
        gap: 40px;
    }
    
    .hero-title {
        font-size: clamp(2rem, 4vw, 3rem);
    }
    
    .grid-4,
    .features-grid,
    .industries-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 40px;
    }
    
    .stats-bar {
        padding: 32px 24px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}

/* Tablet Landscape (768px - 991px) */
@media (max-width: 992px) {
    /* Navigation */
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--nav-surface);
        -webkit-backdrop-filter: var(--glass-blur);
        backdrop-filter: var(--glass-blur);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--glass-border);
        box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
        border-radius: 0 0 20px 20px;
    }
    
    .nav-links.active {
        display: flex;
    }

    /* Theme toggle moves into the mobile menu itself; the header copy hides */
    .nav-actions .theme-toggle {
        display: none;
    }

    .mobile-menu-theme {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        padding-bottom: 16px;
        margin-bottom: 8px;
        border-bottom: 1px solid var(--glass-border);
    }

    .mobile-menu-theme-label {
        font-size: 13px;
        font-weight: 600;
        letter-spacing: 0.04em;
        color: var(--nav-link);
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .mobile-toggle.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .mobile-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-toggle.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    /* Hero Section */
    .hero-section {
        padding: 140px 0 80px;
        min-height: auto;
    }
    
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-content {
        max-width: 100%;
        text-align: center;
    }
    
    .hero-ctas {
        justify-content: center;
    }
    
    .hero-trust {
        justify-content: center;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .dashboard-mockup {
        max-width: 600px;
        margin: 0 auto;
    }
    
    /* Stats Bar */
    .stats-bar {
        flex-wrap: wrap;
        gap: 32px;
        justify-content: center;
    }
    
    .stat-divider {
        display: none;
    }
    
    .stat-item {
        flex: 0 0 calc(50% - 16px);
    }
    
    /* About Section */
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-content {
        text-align: center;
    }
    
    .feature-list {
        text-align: left;
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
    }
    
    .illustration-grid {
        max-width: 500px;
        margin: 0 auto;
    }
    
    /* Governance Section */
    .dual-panel {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 40px 24px;
    }
    
    .panel-visual {
        order: -1;
    }
    
    .governance-graphic {
        max-width: 400px;
        margin: 0 auto;
    }
    
    /* Testimonial */
    .testimonial-wrapper {
        padding: 40px 24px;
    }
    
    .quote {
        font-size: 1.25rem;
    }
    
    /* CTA Section */
    .cta-banner {
        padding: 60px 32px;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    /* Footer */
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
    
    .footer-brand {
        grid-column: 1 / -1;
    }
}

/* Tablet Portrait (576px - 767px) */
@media (max-width: 768px) {
    /* Typography */
    .hero-title {
        font-size: clamp(1.75rem, 5vw, 2.5rem);
    }
    
    .section-title {
        font-size: clamp(1.5rem, 4vw, 2rem);
    }
    
    /* Grids */
    .grid-4,
    .features-grid,
    .industries-grid {
        grid-template-columns: 1fr;
    }
    
    /* Hero */
    .hero-ctas {
        flex-direction: column;
        width: 100%;
    }
    
    .btn.size-lg {
        width: 100%;
    }
    
    .hero-trust {
        flex-direction: column;
        gap: 12px;
        align-items: center;
    }
    
    /* Stats */
    .stat-item {
        flex: 0 0 calc(50% - 16px);
    }
    
    .stat-number {
        font-size: 1.75rem;
    }
    
    /* Cards */
    .feature-card,
    .industry-card,
    .card {
        padding: 24px 20px;
    }
    
    /* Illustration Grid */
    .illustration-grid {
        grid-template-columns: 1fr;
    }
    
    /* Marquee */
    .marquee-section {
        padding: 40px 0;
    }
    
    .marquee-item {
        font-size: 1rem;
    }
    
    /* Testimonial */
    .quote {
        font-size: 1.125rem;
    }
    
    .testimonial-user {
        flex-direction: column;
        gap: 12px;
    }
    
    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-brand {
        text-align: center;
    }
    
    .footer-brand .logo-image {
        margin-left: auto;
        margin-right: auto;
    }
    
    .footer-links-col,
    .footer-newsletter {
        text-align: center;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .footer-base {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
    
    .base-policies {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }
}

/* Mobile (320px - 575px) */
@media (max-width: 576px) {
    /* Container */
    .container {
        padding: 0 16px;
    }
    
    /* Navigation */
    .nav-container {
        padding: 12px 16px;
    }
    
    .logo-image {
        width: 64px;
        height: auto;
    }
    
    /* Hero */
    .hero-section {
        padding: 120px 0 60px;
    }
    
    .hero-title {
        line-height: 1.1;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .dashboard-preview {
        min-height: 200px;
    }
    
    /* Stats Bar */
    .stats-bar {
        padding: 24px 16px;
    }
    
    .stat-item {
        flex: 0 0 100%;
    }
    
    .stat-divider {
        display: block;
        width: 100%;
        height: 1px;
        margin: 16px 0;
    }
    
    /* Sections */
    section {
        padding: 60px 0;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    /* Cards */
    .feature-card,
    .industry-card {
        padding: 20px 16px;
    }
    
    .card-icon-wrapper {
        width: 48px;
        height: 48px;
    }
    
    .card-icon {
        font-size: 1.5rem;
    }
    
    /* Governance */
    .gov-sub-grid {
        flex-direction: column;
        align-items: center;
    }
    
    /* Testimonial */
    .testimonial-wrapper {
        padding: 32px 20px;
    }
    
    .quote-icon {
        font-size: 4rem;
        top: 10px;
        left: 20px;
    }
    
    .quote {
        font-size: 1rem;
    }
    
    .user-avatar {
        width: 48px;
        height: 48px;
        font-size: 1rem;
    }
    
    /* CTA */
    .cta-banner {
        padding: 40px 24px;
    }
    
    .cta-title {
        font-size: 1.5rem;
    }
    
    .cta-subtitle {
        font-size: 1rem;
    }
    
    /* Footer */
    .site-footer {
        padding: 60px 0 32px;
    }
    
    .footer-grid {
        gap: 32px;
        margin-bottom: 40px;
    }
    
    .footer-links-col h5,
    .footer-newsletter h5 {
        margin-bottom: 16px;
    }
    
    .footer-links-col a {
        padding: 6px 0;
    }
}

/* Small Mobile (320px - 374px) */
@media (max-width: 375px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.875rem;
    }

    .btn-primary,
    .btn-secondary {
        padding-right: 54px;
    }

    .badge-pill {
        padding: 6px 12px 6px 12px;
        font-size: 0.75rem;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .logo-image {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .navbar,
    .bg-blur-container,
    .btn,
    .theme-toggle,
    .mobile-toggle {
        display: none !important;
    }
    
    .hero-section {
        padding: 40px 0;
    }
    
    .glass-panel,
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .blob {
        animation: none;
    }
    
    .marquee-track {
        animation: none;
    }
}

/* Dark Mode Preference */
@media (prefers-color-scheme: light) {
    body:not(.theme-dark) {
        --bg-primary: #f1f1f1;
        --bg-secondary: #FFFFFF;
        --bg-tertiary: #F1F5F9;
        
        --text-primary: #0F172A;
        --text-secondary: #1E293B;
        --text-tertiary: #334155;
        --text-muted: #475569;
    }
}

/* Hover Capability */
@media (hover: none) {
    .feature-card:hover,
    .industry-card:hover,
    .card:hover {
        transform: none;
    }
    
    .btn:hover {
        transform: none;
    }
}

/* Pointer Type */
@media (pointer: coarse) {
    .btn {
        min-height: 48px;
        min-width: 48px;
    }

    .nav-item {
        padding: 12px 0;
    }

    .form-control {
        min-height: 48px;
        font-size: 16px;
        /* iOS Safari zooms the page on focus for any input under 16px */
    }
}