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

/* Large Desktop (1200px and up) */
@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
}

/* Desktop (992px to 1199px) */
@media (max-width: 1199px) {
    .container {
        max-width: 960px;
    }
    
    h1 {
        font-size: var(--font-size-4xl);
    }
    
    h2 {
        font-size: var(--font-size-3xl);
    }
    
    .hero .container {
        gap: var(--spacing-2xl);
    }
    
    .courses-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

/* Tablet (768px to 991px) */
@media (max-width: 991px) {
    .container {
        max-width: 720px;
    }
    
    /* Navigation */
    .menu-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background-color: var(--bg-color);
        flex-direction: column;
        padding: var(--spacing-3xl) var(--spacing-lg);
        box-shadow: var(--shadow-xl);
        transition: right var(--transition-normal);
        z-index: 1001;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu > li {
        width: 100%;
    }
    
    .nav-menu a {
        display: block;
        padding: var(--spacing-sm) 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding-left: var(--spacing-lg);
        margin-top: var(--spacing-sm);
        display: none;
    }
    
    .dropdown.active .dropdown-menu {
        display: block;
    }
    
    .nav-actions {
        display: none;
    }
    
    /* Hero Section */
    .hero .container {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-2xl);
    }
    
    .hero-stats {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-image {
        width: 100%;
        max-width: 600px;
        margin: 0 auto;
    }
    
    /* Courses */
    .courses-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: var(--spacing-lg);
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .view-all {
        align-self: flex-start;
    }
    
    /* Testimonials */
    .testimonials-slider {
        grid-template-columns: 1fr;
    }
    
    /* Footer */
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-2xl);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }
}

/* Mobile (576px to 767px) */
@media (max-width: 767px) {
    .container {
        max-width: 540px;
    }
    
    h1 {
        font-size: var(--font-size-3xl);
    }
    
    h2 {
        font-size: var(--font-size-2xl);
    }
    
    h3 {
        font-size: var(--font-size-xl);
    }
    
    /* Header */
    .header-top .container {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
    
    .contact-info {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    /* Hero */
    .hero {
        padding: var(--spacing-2xl) 0;
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .hero-stats {
        gap: var(--spacing-lg);
    }
    
    .stat-number {
        font-size: var(--font-size-3xl);
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-actions .btn {
        width: 100%;
        max-width: 300px;
    }
    
    /* Courses */
    .courses-grid {
        grid-template-columns: 1fr;
    }
    
    .course-card {
        max-width: 400px;
        margin: 0 auto;
    }
    
    .course-meta {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
    
    .course-footer {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    /* Features */
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .feature {
        padding: var(--spacing-md);
    }
    
    /* Testimonials */
    .testimonial {
        padding: var(--spacing-lg);
    }
    
    .testimonial-content {
        font-size: var(--font-size-base);
    }
    
    /* Blog */
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    .blog-card {
        max-width: 400px;
        margin: 0 auto;
    }
    
    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer-col {
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .contact-info li {
        justify-content: center;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
}

/* Small Mobile (up to 575px) */
@media (max-width: 575px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    h1 {
        font-size: var(--font-size-2xl);
    }
    
    h2 {
        font-size: var(--font-size-xl);
    }
    
    /* Navigation */
    .nav-menu {
        width: 100%;
    }
    
    .logo span {
        font-size: var(--font-size-xl);
    }
    
    /* Hero */
    .hero-stats {
        gap: var(--spacing-md);
    }
    
    .stat {
        flex: 1;
        min-width: 100px;
    }
    
    .stat-number {
        font-size: var(--font-size-2xl);
    }
    
    /* Courses */
    .course-content {
        padding: var(--spacing-md);
    }
    
    .course-price .price {
        font-size: var(--font-size-2xl);
    }
    
    /* Testimonials */
    .testimonial-author {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    /* Buttons */
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
    
    .btn-large {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-base);
    }
}

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

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --text-color: #ffffff;
        --text-light: #cccccc;
        --text-lighter: #999999;
        --bg-color: #1a1a1a;
        --bg-light: #2a2a2a;
        --bg-lighter: #333333;
        --border-color: #444444;
    }
    
    .header,
    .course-card,
    .testimonial,
    .blog-card {
        background-color: var(--bg-light);
    }
    
    .featured-courses,
    .testimonials {
        background-color: var(--bg-color);
    }
    
    .footer {
        background-color: #000000;
    }
}

/* 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-image img,
    .course-image img,
    .blog-image img {
        transition: none !important;
    }
    
    .course-card:hover,
    .blog-card:hover {
        transform: none !important;
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .dropdown:hover .dropdown-menu {
        opacity: 0;
        visibility: hidden;
    }
    
    .dropdown.active .dropdown-menu {
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu a {
        padding: var(--spacing-md) 0;
    }
    
    .btn {
        min-height: 44px;
        min-width: 44px;
    }
    
    .social-links a,
    .footer-social a {
        min-width: 44px;
        min-height: 44px;
    }
}

/* Landscape Orientation */
@media (orientation: landscape) and (max-height: 500px) {
    .hero {
        padding: var(--spacing-xl) 0;
    }
    
    .hero .container {
        gap: var(--spacing-lg);
    }
    
    .hero-image {
        max-height: 300px;
    }
    
    .featured-courses,
    .why-choose-us,
    .testimonials,
    .cta,
    .blog-preview {
        padding: var(--spacing-xl) 0;
    }
}

/* Print Optimization */
@media print {
    .header-top,
    .social-links,
    .nav-actions,
    .hero-actions,
    .footer-social,
    .newsletter-form,
    .course-badge,
    .rating {
        display: none !important;
    }
    
    .container {
        max-width: 100% !important;
        padding: 0 !important;
    }
    
    .hero .container {
        flex-direction: column !important;
        text-align: center !important;
    }
    
    .courses-grid,
    .features-grid,
    .testimonials-slider,
    .blog-grid,
    .footer-grid {
        display: block !important;
    }
    
    .course-card,
    .feature,
    .testimonial,
    .blog-card,
    .footer-col {
        break-inside: avoid;
        margin-bottom: 1cm !important;
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
    
    a {
        color: black !important;
        text-decoration: underline !important;
    }
    
    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        font-weight: normal;
    }
    
    .btn {
        border: 1px solid black !important;
        color: black !important;
        background: none !important;
    }
}