/* Responsive Styles */

/* Large screens (1280px and up) */
@media (min-width: 1280px) {
    .container {
        max-width: 1280px;
    }
    
    .hero-title {
        font-size: var(--font-size-6xl);
    }
    
    .hero-features {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Desktop (1024px to 1279px) */
@media (max-width: 1279px) {
    .container {
        max-width: 1024px;
    }
}

/* Tablet (768px to 1023px) */
@media (max-width: 1023px) {
    .container {
        max-width: 768px;
        padding: 0 var(--spacing-lg);
    }
    
    /* Header adjustments */
    .nav-list {
        gap: var(--spacing-lg);
    }
    
    .nav-actions {
        gap: var(--spacing-sm);
    }
    
    /* Hero section */
    .hero {
        padding: var(--spacing-5xl) 0;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .hero-description {
        font-size: var(--font-size-lg);
    }
    
    .hero-features {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .feature-item {
        padding: var(--spacing-lg);
    }
    
    /* Demo section */
    .demo-section {
        padding: var(--spacing-5xl) 0;
    }
    
    .chat-sidebar {
        width: 160px;
    }
    
    .chat-item {
        font-size: var(--font-size-xs);
    }
    
    /* Models grid */
    .models-grid {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        gap: var(--spacing-md);
    }
    
    .model-item {
        padding: var(--spacing-lg);
    }
    
    /* Use cases */
    .use-cases-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: var(--spacing-lg);
    }
    
    .use-case-card {
        padding: var(--spacing-lg);
    }
    
    /* Download section */
    .download-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .footer-links {
        gap: var(--spacing-2xl);
    }
}

/* Mobile Large (640px to 767px) */
@media (max-width: 767px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    /* Header mobile */
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--bg-card);
        border-top: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-lg);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: var(--transition-all);
        z-index: var(--z-dropdown);
    }
    
    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .nav-list {
        flex-direction: column;
        gap: var(--spacing-lg);
        align-items: flex-start;
    }
    
    .nav-link {
        font-size: var(--font-size-lg);
        padding: var(--spacing-sm) 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    /* Hero section mobile */
    .hero {
        padding: var(--spacing-4xl) 0;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
        line-height: var(--line-height-tight);
    }
    
    .hero-description {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-3xl);
    }
    
    .hero-features {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .feature-item {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-lg);
    }
    
    .feature-icon {
        align-self: center;
    }
    
    /* Demo section mobile */
    .demo-section {
        padding: var(--spacing-4xl) 0;
    }
    
    .chat-interface {
        flex-direction: column;
    }
    
    .chat-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: var(--spacing-md);
    }
    
    .chat-main {
        padding: var(--spacing-md);
    }
    
    .chat-input {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    /* Sections spacing */
    .models-section,
    .use-cases-section,
    .download-section {
        padding: var(--spacing-4xl) 0;
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .section-subtitle {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-3xl);
    }
    
    /* Models grid mobile */
    .models-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .model-item {
        padding: var(--spacing-md);
    }
    
    .model-icon {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-sm);
    }
    
    /* Use cases mobile */
    .use-cases-tabs {
        flex-direction: column;
        gap: var(--spacing-sm);
        margin-bottom: var(--spacing-2xl);
    }
    
    .tab-button {
        padding: var(--spacing-sm) var(--spacing-lg);
    }
    
    .use-cases-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .use-case-card {
        padding: var(--spacing-lg);
    }
    
    .use-case-card h3 {
        font-size: var(--font-size-lg);
    }
    
    /* Download section mobile */
    .download-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .download-card {
        padding: var(--spacing-lg);
    }
    
    .platform-icon {
        width: 48px;
        height: 48px;
        margin-bottom: var(--spacing-md);
    }
    
    .platform-icon svg {
        width: 24px;
        height: 24px;
    }
    
    .download-card h3 {
        font-size: var(--font-size-xl);
    }
    
    .download-link {
        flex-direction: column;
        gap: var(--spacing-xs);
        text-align: center;
    }
    
    /* Footer mobile */
    .footer {
        padding: var(--spacing-3xl) 0 var(--spacing-xl);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-xl);
    }
    
    .social-links {
        justify-content: center;
    }
}

/* Mobile Small (480px to 639px) */
@media (max-width: 639px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    /* Further mobile optimizations */
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .hero-description {
        font-size: var(--font-size-sm);
    }
    
    .section-title {
        font-size: var(--font-size-xl);
    }
    
    .models-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .use-case-preview {
        height: 80px;
    }
    
    .download-options {
        gap: var(--spacing-sm);
    }
}

/* Mobile Extra Small (below 480px) */
@media (max-width: 479px) {
    :root {
        --container-padding: var(--spacing-sm);
    }
    
    .hero {
        padding: var(--spacing-3xl) 0;
    }
    
    .hero-title {
        font-size: var(--font-size-xl);
    }
    
    .models-section,
    .use-cases-section,
    .download-section {
        padding: var(--spacing-3xl) 0;
    }
    
    .models-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-xs);
    }
    
    .model-item {
        padding: var(--spacing-sm);
    }
    
    .model-icon {
        font-size: var(--font-size-lg);
    }
    
    .use-case-card,
    .download-card {
        padding: var(--spacing-md);
    }
}

/* Landscape mobile optimization */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        padding: var(--spacing-2xl) 0;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .hero-description {
        margin-bottom: var(--spacing-lg);
    }
    
    .hero-features {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-md);
    }
    
    .feature-item {
        padding: var(--spacing-md);
    }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .demo-placeholder,
    .use-case-preview {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

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

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    }
    
    .border,
    .card,
    .download-card,
    .use-case-card {
        border-width: 2px;
    }
}