/* ==========================================================================
   Responsive Design System
   ========================================================================== */

/* Tablet - Large breakpoint (1024px) */
@media (max-width: 1024px) {
    :root {
        --fs-4xl: 3rem;
        --fs-5xl: 3.5rem;
        --fs-6xl: 4.5rem;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-10);
    }

    .hero-visual {
        max-width: 400px;
        margin: 0 auto;
    }

    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-8);
    }

    .footer-brand {
        grid-column: 1 / -1;
    }
}

/* Tablet (768px) */
@media (max-width: 768px) {
    :root {
        --fs-3xl: 2rem;
        --fs-4xl: 2.5rem;
        --fs-5xl: 3rem;
        --fs-hero: clamp(2.25rem, 10vw, 4rem);
    }

    /* Navigation */
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--space-6);
        gap: var(--space-3);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        width: 100%;
        text-align: center;
        padding: var(--space-3);
    }

    .nav-cta {
        margin-left: 0;
        flex-direction: column;
        width: 100%;
    }

    .mobile-toggle {
        display: flex;
    }

    /* Hero */
    .hero {
        min-height: auto;
        padding-top: calc(var(--header-height) + var(--space-12));
        padding-bottom: var(--space-12);
    }

    .hero-stats {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .hero-card-1 { width: 160px; left: 0; }
    .hero-card-2 { width: 170px; }
    .hero-card-3 { width: 180px; }

    /* Grids */
    .grid-2 { grid-template-columns: 1fr; }
    .grid-3 { grid-template-columns: 1fr; }
    .grid-4 { grid-template-columns: 1fr; }

    /* Sections */
    .section {
        padding: var(--space-20) 0;
    }

    .page-hero {
        padding: calc(var(--header-height) + var(--space-12)) 0 var(--space-12);
    }

    .section-header {
        margin-bottom: var(--space-10);
    }

    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .footer-brand {
        grid-column: auto;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: var(--space-3);
    }

    /* Cards */
    .card {
        padding: var(--space-6);
    }

    /* Tables */
    .data-table {
        font-size: var(--fs-xs);
    }

    .data-table th,
    .data-table td {
        padding: var(--space-2) var(--space-3);
    }
}

/* Mobile (640px) */
@media (max-width: 640px) {
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .hero-visual {
        max-width: 320px;
    }

    .section-eyebrow::before,
    .section-eyebrow::after {
        width: 16px;
    }

    /* App grid */
    .apps-grid {
        grid-template-columns: 1fr;
    }

    /* Team grid */
    .team-grid {
        grid-template-columns: 1fr;
    }

    /* Privacy page */
    .privacy-toc {
        position: static;
        margin-bottom: var(--space-8);
    }

    .legal-doc h2 {
        font-size: var(--fs-2xl);
    }

    .legal-doc h3 {
        font-size: var(--fs-xl);
    }

    /* Contact form */
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

/* Large screens (1440px+) */
@media (min-width: 1440px) {
    :root {
        --container-max: 1600px;
    }

    .section {
        padding: var(--space-32) 0;
    }
}

/* Ultra wide (1920px+) */
@media (min-width: 1920px) {
    :root {
        --fs-hero: clamp(4rem, 8vw, 8rem);
    }
}

/* Print styles */
@media print {
    .site-header,
    .site-footer,
    .hero-bg,
    .preloader,
    .mobile-toggle,
    .nav-cta {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }

    a {
        color: black;
        text-decoration: underline;
    }
}

/* High DPI / Retina */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    body::before {
        background-size: 30px 30px;
    }
}

/* Dark mode - already default, this is for completeness */
@media (prefers-color-scheme: light) {
    /* We use dark mode as default, so this just ensures consistency */
}

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

    .hero-orb,
    .reveal,
    .reveal-left,
    .reveal-right,
    .reveal-scale {
        opacity: 1;
        transform: none;
    }
}

/* Touch device optimizations */
@media (hover: none) {
    .card:hover {
        transform: none;
    }

    .nav-link::before {
        display: none;
    }

    .flip-card:hover .flip-card-inner {
        transform: none;
    }
}