/* ============================================
   RESPONSIVE DESIGN
   Mobile, Tablet, Desktop Breakpoints
   ============================================ */

/* Medium Devices (Tablets) */
@media (max-width: 1024px) {
    :root {
        --font-size-h1: 2.5rem;
        --font-size-h2: 2rem;
        --font-size-h3: 1.5rem;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        padding: var(--spacing-3xl) var(--spacing-lg);
    }
    
    .hero-mockup {
        display: flex;
        justify-content: center;
    }
    
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .usp-grid,
    .feature-catalog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Small Devices (Mobile) */
@media (max-width: 768px) {
    :root {
        --font-size-h1: 2rem;
        --font-size-h2: 1.75rem;
        --font-size-h3: 1.375rem;
        --font-size-body: 0.95rem;
        --spacing-2xl: 2rem;
        --spacing-3xl: 2.5rem;
        --spacing-4xl: 3rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    /* Header */
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        gap: 0;
        box-shadow: var(--shadow-lg);
    }

    .nav-menu .has-mega {
        width: 100%;
    }

    .nav-dropdown-toggle {
        width: 100%;
        text-align: left;
    }

    .mega-menu {
        position: static;
        width: 100%;
        grid-template-columns: 1fr;
        padding: 0 var(--spacing-lg) var(--spacing-md);
        border: 0;
        border-radius: 0;
        box-shadow: none;
        background: #f7fff9;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: none;
        display: none;
    }

    .has-mega.is-open .mega-menu {
        display: grid;
    }

    .nav-menu .has-mega .mega-menu,
    .nav-menu .has-mega:hover .mega-menu,
    .nav-menu .has-mega:focus-within .mega-menu,
    .nav-menu .has-mega.is-open .mega-menu {
        left: auto;
        right: auto;
        max-width: 100%;
        transform: none !important;
    }

    .mega-menu a {
        padding: .8rem .9rem;
    }
    
    .nav-menu.active {
        display: flex;
        z-index: 3200;
        max-height: calc(100vh - 76px);
        overflow-y: auto;
        overscroll-behavior: contain;
    }

    body.nav-is-open .mobile-sticky-cta {
        display: none;
    }
    
    .nav-menu li {
        border-bottom: 1px solid var(--color-border);
    }
    
    .nav-menu li:last-child {
        border-bottom: none;
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-lg);
        border-radius: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    /* Hero */
    .hero {
        min-height: 500px;
        background-attachment: scroll;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        padding: var(--spacing-2xl) var(--spacing-lg);
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }
    
    /* Buttons */
    .btn {
        width: 100%;
    }
    
    .btn-sm {
        width: auto;
    }
    
    /* Grid */
    .grid-4,
    .grid-3,
    .grid-2 {
        grid-template-columns: 1fr;
    }

    .signature-grid,
    .feature-hero-grid,
    .challenge-grid,
    .usp-grid,
    .feature-catalog-grid {
        grid-template-columns: 1fr;
    }

    .product-feature-hero {
        grid-column: auto;
    }

    .feature-hero {
        padding: var(--spacing-4xl) var(--spacing-lg);
    }

    .feature-manifesto {
        padding: var(--spacing-2xl);
        transform: none;
    }
    
    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    /* Cards */
    .card {
        padding: var(--spacing-lg);
    }
    
    /* Forms */
    input,
    textarea,
    select {
        padding: var(--spacing-md);
        font-size: 16px; /* Prevent zoom on iOS */
    }
    
    section {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }
    
    .section-header {
        margin-bottom: var(--spacing-2xl);
    }
}

/* Extra Small (Mobile Portrait) */
@media (max-width: 480px) {
    :root {
        --font-size-h1: 1.75rem;
        --font-size-h2: 1.5rem;
        --font-size-h3: 1.25rem;
        --spacing-xl: 1.25rem;
        --spacing-2xl: 1.5rem;
    }
    
    .navbar-container {
        gap: var(--spacing-md);
    }
    
    .logo {
        font-size: 1rem;
    }
    
    .hero {
        min-height: 400px;
    }
    
    .hero-cta {
        gap: var(--spacing-md);
    }
    
    .btn-lg {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 1rem;
    }
    
    .hero-bullets {
        margin-bottom: var(--spacing-lg);
    }
    
    .hero-bullets li {
        font-size: 1rem;
    }
    
    h1 {
        margin-bottom: var(--spacing-sm);
    }
    
    p {
        margin-bottom: var(--spacing-md);
    }
    
    section {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .card {
        padding: var(--spacing-lg) var(--spacing-md);
    }
}

/* Landscape Mode */
@media (max-height: 600px) {
    .hero {
        min-height: 300px;
    }
    
    .hero-content {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }
}

/* High Resolution (Retina) */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    /* Crisp text rendering */
    body {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* Keep the marketing site in its intentional light color system. */
@media (prefers-color-scheme: dark) {
    :root {
        --color-background: var(--cream);
        --color-text: var(--text);
        --color-text-light: var(--text-soft);
        --color-border: var(--border);
        --color-white: var(--surface);
    }
    
    .header {
        background-color: rgba(255, 255, 255, .92);
    }
    
    .card {
        background-color: var(--surface);
    }
    
    input,
    textarea,
    select {
        background-color: var(--surface);
        color: var(--color-text);
    }
}

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

@media (min-width: 1024px) {
    .navbar-actions .btn {
        display: inline-flex;
    }
}

/* Print Styles */
@media print {
    header,
    footer,
    .hamburger,
    .btn {
        display: none;
    }
    
    body {
        background-color: white;
        color: black;
    }
}

/* Final footer layout: 5 desktop columns, 2 tablet columns, 1 mobile column. */
@media (min-width: 1024px) {
    .footer-grid {
        grid-template-columns: minmax(230px, 1.25fr) repeat(4, minmax(130px, 1fr));
        gap: clamp(1.5rem, 2.4vw, 3rem);
    }
}

@media (min-width: 769px) and (max-width: 1023px) {
    .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}