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

/* Large devices (desktops, 1200px and up) */
@media (max-width: 1199.98px) {
    .container {
        max-width: var(--container-lg);
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

/* Medium devices (tablets, 992px and up) */
@media (max-width: 991.98px) {
    .container {
        max-width: var(--container-md);
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .quiz-preview-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .quiz-preview .section-title {
        text-align: center;
    }
    
    .articles-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Small devices (landscape phones, 768px and up) */
@media (max-width: 767.98px) {
    .container {
        max-width: var(--container-sm);
        padding: 0 var(--spacing-lg);
    }
    
    /* Navigation */
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: var(--white);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--spacing-xxl);
        transition: left var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        gap: var(--spacing-lg);
        width: 100%;
        text-align: center;
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-lg);
        width: 100%;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active .bar:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }
    
    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active .bar:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }
    
    /* Hero Section */
    .hero {
        padding: var(--spacing-xl) 0;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .hero-description {
        font-size: var(--font-size-base);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
    
    /* Sections */
    section {
        padding: var(--spacing-xl) 0;
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .section-header {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    /* Features */
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .feature-card {
        padding: var(--spacing-lg);
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: var(--font-size-xl);
    }
    
    /* Articles */
    .articles-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    /* Quiz Stats */
    .quiz-stats {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .stat-item {
        padding: var(--spacing-md);
        background-color: rgba(255, 255, 255, 0.1);
        border-radius: var(--border-radius-md);
    }
    
    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

/* Extra small devices (portrait phones, less than 576px) */
@media (max-width: 575.98px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    /* Typography */
    h1 {
        font-size: var(--font-size-2xl);
    }
    
    h2 {
        font-size: var(--font-size-xl);
    }
    
    h3 {
        font-size: var(--font-size-lg);
    }
    
    /* Navigation */
    .nav-logo {
        font-size: var(--font-size-lg);
    }
    
    .nav-logo i {
        font-size: var(--font-size-xl);
    }
    
    /* Hero */
    .hero-title {
        font-size: var(--font-size-xl);
        line-height: var(--line-height-normal);
    }
    
    .hero-description {
        font-size: var(--font-size-sm);
    }
    
    /* Buttons */
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
    
    .btn-large {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-base);
    }
    
    /* Cards */
    .feature-card,
    .article-card {
        margin-bottom: var(--spacing-md);
    }
    
    .article-content {
        padding: var(--spacing-md);
    }
    
    .article-title {
        font-size: var(--font-size-lg);
    }
    
    /* Quiz Stats */
    .stat-number {
        font-size: var(--font-size-2xl);
    }
    
    /* Forms */
    .form-input,
    .form-select,
    .form-textarea {
        font-size: var(--font-size-base);
    }
}

/* Utility classes for responsive design */
@media (max-width: 767.98px) {
    .d-md-none {
        display: none !important;
    }
    
    .d-md-block {
        display: block !important;
    }
    
    .text-md-center {
        text-align: center !important;
    }
    
    .flex-md-column {
        flex-direction: column !important;
    }
}

@media (max-width: 575.98px) {
    .d-sm-none {
        display: none !important;
    }
    
    .d-sm-block {
        display: block !important;
    }
    
    .text-sm-center {
        text-align: center !important;
    }
    
    .flex-sm-column {
        flex-direction: column !important;
    }
}

/* Print styles */
@media print {
    .header,
    .footer,
    .nav-toggle,
    .btn,
    .social-links {
        display: none !important;
    }
    
    .main {
        margin-top: 0 !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
        color: #000;
        background: #fff;
    }
    
    h1, h2, h3, h4, h5, h6 {
        color: #000;
        page-break-after: avoid;
    }
    
    p, li {
        orphans: 3;
        widows: 3;
    }
    
    .page-break {
        page-break-before: always;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #0066cc;
        --secondary-color: #000000;
        --text-primary: #000000;
        --text-secondary: #333333;
        --border-color: #000000;
    }
    
    .btn {
        border-width: 2px;
    }
    
    .card,
    .feature-card,
    .article-card {
        border: 2px solid var(--border-color);
    }
}

/* Reduced motion support */
@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;
    }
}

/* ===== MOBILE-SPECIFIC ENHANCEMENTS ===== */

/* Touch-friendly interactions */
@media (max-width: 767.98px) {
    /* Larger touch targets */
    .btn,
    .nav-link,
    .filter-btn,
    .difficulty-btn,
    .category-card,
    .answer-option {
        min-height: 44px;
        min-width: 44px;
    }

    /* Better spacing for touch */
    .btn {
        padding: 0.75rem 1.5rem;
        margin: 0.25rem;
    }

    /* Improved form controls */
    .form-input,
    .form-select,
    .form-textarea {
        padding: 0.75rem;
        font-size: 16px; /* Prevents zoom on iOS */
        border-radius: 8px;
    }

    /* Better quiz interface for mobile */
    .quiz-header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .quiz-info {
        justify-content: center;
    }

    .question-card {
        padding: 1.5rem;
    }

    .answer-option {
        padding: 1rem;
        margin-bottom: 0.75rem;
        border-radius: 8px;
    }

    .question-actions {
        flex-direction: column;
        gap: 0.75rem;
    }

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

    /* Mobile-optimized cards */
    .feature-card,
    .article-card {
        padding: 1.5rem;
        margin-bottom: 1rem;
    }

    .article-image {
        height: 180px;
    }

    /* Better mobile navigation */
    .nav-menu.active {
        backdrop-filter: blur(10px);
        background-color: rgba(255, 255, 255, 0.95);
    }

    /* Improved mobile footer */
    .footer-content {
        gap: 2rem;
    }

    .footer-section {
        text-align: center;
    }

    /* Mobile-specific utilities */
    .mobile-hidden {
        display: none !important;
    }

    .mobile-center {
        text-align: center !important;
    }

    .mobile-full-width {
        width: 100% !important;
    }
}

/* Extra small devices - specific touch optimizations */
@media (max-width: 575.98px) {
    /* Even larger touch targets for small screens */
    .btn {
        padding: 1rem 1.5rem;
        font-size: 1rem;
    }

    /* Simplified quiz layout */
    .category-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .difficulty-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .difficulty-btn {
        width: 100%;
        justify-content: center;
        padding: 1rem;
    }

    /* Better mobile forms */
    .form-row {
        flex-direction: column;
    }

    .contact-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    /* Improved mobile article layout */
    .article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .article-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    /* Mobile-optimized results */
    .results-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .results-actions {
        flex-direction: column;
        align-items: stretch;
    }

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

/* Landscape phone optimization */
@media (max-width: 767.98px) and (orientation: landscape) {
    .hero {
        padding: 2rem 0;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .quiz-interface {
        padding: 1rem 0;
    }

    .question-card {
        padding: 1rem;
    }

    .nav-menu.active {
        height: 100vh;
        padding-top: 2rem;
    }
}

/* iOS Safari specific fixes */
@supports (-webkit-touch-callout: none) {
    /* Fix for iOS Safari viewport height issues */
    .main {
        min-height: -webkit-fill-available;
    }

    /* Fix for iOS Safari input zoom */
    .form-input,
    .form-select,
    .form-textarea {
        font-size: 16px;
    }

    /* Fix for iOS Safari button styling */
    .btn {
        -webkit-appearance: none;
        border-radius: 8px;
    }
}

/* Android Chrome specific fixes */
@media screen and (-webkit-min-device-pixel-ratio: 0) {
    /* Fix for Android Chrome input styling */
    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
        outline: none;
        box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.25);
    }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    /* Ensure crisp images on retina displays */
    img {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #1a1a1a;
        --bg-secondary: #2d2d2d;
        --text-primary: #ffffff;
        --text-secondary: #b0b0b0;
        --border-color: #404040;
    }

    body {
        background-color: var(--bg-primary);
        color: var(--text-primary);
    }

    .header {
        background-color: rgba(26, 26, 26, 0.95);
        border-bottom-color: var(--border-color);
    }

    .card,
    .feature-card,
    .article-card,
    .question-card {
        background-color: var(--bg-secondary);
        border-color: var(--border-color);
    }

    .form-input,
    .form-select,
    .form-textarea {
        background-color: var(--bg-secondary);
        border-color: var(--border-color);
        color: var(--text-primary);
    }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: no-preference) {
    /* Smooth scrolling for users who don't prefer reduced motion */
    html {
        scroll-behavior: smooth;
    }

    /* Subtle animations for better UX */
    .btn,
    .card,
    .nav-link {
        transition: all 0.2s ease;
    }
}

/* Focus improvements for keyboard navigation */
.btn:focus-visible,
.nav-link:focus-visible,
.form-input:focus-visible,
.form-select:focus-visible,
.form-textarea:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 10000;
}

.skip-link:focus {
    top: 6px;
}