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

/* Large Desktop (1200px and up) */
@media (min-width: 1200px) {
    .container {
        max-width: 1400px;
    }
    
    .hero h1 {
        font-size: 3.5rem;
    }
    
    .section-title h2 {
        font-size: 2.5rem;
    }
}

/* Desktop (992px to 1199px) */
@media (max-width: 1199px) {
    .container {
        max-width: 960px;
    }
}

/* Tablet (768px to 991px) */
@media (max-width: 991px) {
    .container {
        max-width: 720px;
        padding: 0 var(--spacing-md);
    }
    
    /* Navigation */
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-medium);
        padding: var(--spacing-lg) 0;
        gap: var(--spacing-md);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    /* Hero Section */
    .hero {
        padding: var(--spacing-xl) 0;
    }
    
    .hero h1 {
        font-size: var(--font-size-3xl);
    }
    
    /* About Company */
    .about-company {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .about-images {
        order: -1;
    }
    
    /* Companies Grid */
    .companies-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: var(--spacing-md);
    }
    
    .company-logo {
        width: 60px;
        height: 60px;
        font-size: var(--font-size-lg);
    }
    
    /* Testimonials */
    .testimonials-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    /* Courses */
    .courses-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
    
    /* Stats */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    /* Footer */
    .footer-sections {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    
    .footer-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Carousel */
    .carousel-controls {
        width: 40px;
        height: 40px;
    }
    
    .carousel-prev {
        left: var(--spacing-sm);
    }
    
    .carousel-next {
        right: var(--spacing-sm);
    }
}

/* Small Tablet (576px to 767px) */
@media (max-width: 767px) {
    .container {
        max-width: 540px;
    }
    
    /* Typography */
    .hero h1 {
        font-size: var(--font-size-2xl);
    }
    
    .section-title h2 {
        font-size: var(--font-size-2xl);
    }
    
    /* Spacing */
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    /* About Images */
    .about-images {
        grid-template-columns: 1fr;
    }
    
    /* Companies */
    .companies-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    /* Footer */
    .footer-sections {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .footer-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    /* Carousel */
    .carousel-slide img {
        height: 300px;
    }
    
    .carousel-overlay {
        padding: var(--spacing-lg);
    }
    
    .carousel-overlay h3 {
        font-size: var(--font-size-lg);
    }
}

/* Mobile (up to 575px) */
@media (max-width: 575px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    /* Navigation */
    .nav-container {
        padding: 0 var(--spacing-sm);
    }
    
    .nav-logo h2 {
        font-size: var(--font-size-lg);
    }
    
    .nav-menu {
        top: 60px;
        padding: var(--spacing-md) 0;
    }
    
    /* Typography */
    .hero h1 {
        font-size: var(--font-size-xl);
        line-height: 1.3;
    }
    
    .hero p {
        font-size: var(--font-size-base);
    }
    
    .section-title h2 {
        font-size: var(--font-size-xl);
    }
    
    .section-title p {
        font-size: var(--font-size-base);
    }
    
    /* Spacing */
    .section {
        padding: var(--spacing-lg) 0;
    }
    
    .hero {
        padding: var(--spacing-md) 0;
    }
    
    /* Cards */
    .company-card,
    .testimonial-card,
    .course-card {
        padding: var(--spacing-md);
    }
    
    .testimonial-card::before {
        font-size: 3rem;
        top: -5px;
        left: var(--spacing-md);
    }
    
    /* Companies */
    .companies-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .company-logo {
        width: 50px;
        height: 50px;
        font-size: var(--font-size-base);
    }
    
    .company-card h3 {
        font-size: var(--font-size-base);
    }
    
    /* Courses */
    .courses-grid {
        grid-template-columns: 1fr;
    }
    
    .course-image {
        height: 150px;
        font-size: var(--font-size-2xl);
    }
    
    /* Stats */
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .stat-item {
        padding: var(--spacing-md);
    }
    
    .stat-number {
        font-size: var(--font-size-2xl);
    }
    
    .stat-label {
        font-size: var(--font-size-base);
    }
    
    /* Footer */
    .footer {
        padding-top: var(--spacing-lg);
    }
    
    .footer-sections {
        gap: var(--spacing-lg);
    }
    
    .footer-section {
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .footer-stats {
        padding: var(--spacing-lg) 0;
    }
    
    .footer-stats .stat-number {
        font-size: var(--font-size-lg);
    }
    
    /* Carousel */
    .carousel-slide img {
        height: 250px;
    }
    
    .carousel-overlay {
        padding: var(--spacing-md);
    }
    
    .carousel-overlay h3 {
        font-size: var(--font-size-base);
    }
    
    .carousel-controls {
        width: 35px;
        height: 35px;
        font-size: var(--font-size-sm);
    }
    
    /* Buttons */
    .btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-sm);
    }
    
    /* Forms */
    .input-group {
        flex-direction: column;
    }
    
    .input-group input,
    .input-group button {
        border-radius: var(--radius-md);
    }
    
    .input-group button {
        margin-top: var(--spacing-xs);
    }
}

/* Extra Small Mobile (up to 375px) */
@media (max-width: 375px) {
    .container {
        padding: 0 var(--spacing-xs);
    }
    
    /* Navigation */
    .nav-container {
        padding: 0 var(--spacing-xs);
    }
    
    .nav-logo h2 {
        font-size: var(--font-size-base);
    }
    
    /* Typography */
    .hero h1 {
        font-size: var(--font-size-lg);
    }
    
    .section-title h2 {
        font-size: var(--font-size-lg);
    }
    
    /* Cards */
    .company-card,
    .testimonial-card,
    .course-card {
        padding: var(--spacing-sm);
    }
    
    /* Companies */
    .companies-grid {
        grid-template-columns: 1fr;
    }
    
    /* Carousel */
    .carousel-slide img {
        height: 200px;
    }
    
    .carousel-overlay {
        padding: var(--spacing-sm);
    }
    
    .carousel-controls {
        width: 30px;
        height: 30px;
    }
    
    .carousel-prev {
        left: var(--spacing-xs);
    }
    
    .carousel-next {
        right: var(--spacing-xs);
    }
}

/* Landscape Mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        padding: var(--spacing-sm) 0;
    }
    
    .hero h1 {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-sm);
    }
    
    .hero p {
        margin-bottom: var(--spacing-md);
    }
    
    .carousel-slide img {
        height: 200px;
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .carousel-controls,
    .carousel-indicators,
    .btn {
        display: none !important;
    }
    
    .main-content {
        margin-top: 0;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    .section {
        padding: 20pt 0;
        page-break-inside: avoid;
    }
    
    .company-card,
    .testimonial-card,
    .course-card {
        border: 1pt solid #ccc;
        page-break-inside: avoid;
    }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .carousel-slide img,
    .about-image img {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .carousel-wrapper {
        transition: none;
    }
    
    .scroll-behavior {
        scroll-behavior: auto;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #f9fafb;
        --text-secondary: #d1d5db;
        --text-light: #9ca3af;
        --bg-primary: #111827;
        --bg-secondary: #1f2937;
        --border-color: #374151;
    }
    
    .header {
        background-color: var(--bg-primary);
        border-bottom: 1px solid var(--border-color);
    }
    
    .company-card,
    .testimonial-card,
    .course-card {
        background-color: var(--bg-secondary);
        border-color: var(--border-color);
    }
    
    .nav-menu {
        background-color: var(--bg-primary);
    }
}

/* Focus Styles for Accessibility */
@media (prefers-reduced-motion: no-preference) {
    .nav-link:focus,
    .btn:focus,
    .carousel-controls:focus,
    .carousel-indicator:focus,
    .social-link:focus {
        outline: 2px solid var(--primary-color);
        outline-offset: 2px;
    }
}

/* Hover Effects for Touch Devices */
@media (hover: none) and (pointer: coarse) {
    .company-card:hover,
    .testimonial-card:hover,
    .course-card:hover,
    .about-image:hover {
        transform: none;
    }
    
    .carousel-controls:hover {
        transform: translateY(-50%);
    }
}