/* ============================================
   NetSkills - Responsive Design
   ============================================ */

/* Large Desktops (1400px+) */
@media (min-width: 1400px) {
    .container {
        max-width: 1400px;
    }
}

/* Desktops (1200px - 1399px) */
@media (max-width: 1399px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

/* Small Desktops (992px - 1199px) */
@media (max-width: 1199px) {
    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .nav-menu {
        gap: var(--spacing-md);
    }
    
    .hero h1 {
        font-size: 3.5rem;
    }
    
    .course-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

/* Tablets (768px - 991px) */
@media (max-width: 991px) {
    .nav-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
        padding: 0;
    }
    
    .hamburger {
        position: relative;
        display: block;
        width: 24px;
        height: 2px;
        background: var(--text-primary);
        transition: all var(--transition-fast);
    }
    
    .hamburger::before,
    .hamburger::after {
        content: '';
        position: absolute;
        width: 24px;
        height: 2px;
        background: var(--text-primary);
        transition: all var(--transition-fast);
    }
    
    .hamburger::before {
        top: -8px;
        left: 0;
    }
    
    .hamburger::after {
        top: 8px;
        left: 0;
    }
    
    /* Active state for hamburger */
    .nav-toggle.active .hamburger {
        background: transparent;
    }
    
    .nav-toggle.active .hamburger::before {
        top: 0;
        transform: rotate(45deg);
    }
    
    .nav-toggle.active .hamburger::after {
        top: 0;
        transform: rotate(-45deg);
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(26, 26, 26, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: var(--spacing-2xl);
        gap: 0;
        transition: left var(--transition-normal);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-item {
        width: 100%;
        text-align: center;
    }
    
    .nav-link {
        padding: var(--spacing-md) var(--spacing-lg);
        justify-content: center;
        border-radius: 0;
        width: 100%;
    }
    
    .nav-link:hover,
    .nav-link.active {
        background: var(--glass-bg);
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        background: var(--glass-bg);
        margin: var(--spacing-sm) 0;
        display: none;
    }
    
    .dropdown.active .dropdown-menu {
        display: block;
    }
    
    .nav-avatar {
        display: none;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: var(--text-base);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer-brand {
        grid-column: 1 / -1;
        text-align: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}

/* Mobile Landscape (576px - 767px) */
@media (max-width: 767px) {
    :root {
        --text-4xl: 2rem;
        --text-3xl: 1.75rem;
        --text-2xl: 1.5rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero {
        min-height: 70vh;
        padding: var(--spacing-2xl) 0;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .section-title {
        font-size: var(--text-2xl);
    }
    
    .course-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
    }
    
    .stat-card {
        padding: var(--spacing-lg);
    }
    
    .stat-number {
        font-size: var(--text-2xl);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-bottom-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .auth-card {
        padding: var(--spacing-xl);
    }
    
    .auth-features {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }
}

/* Mobile Portrait (< 576px) */
@media (max-width: 575px) {
    :root {
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
        --spacing-2xl: 2rem;
        --spacing-3xl: 2.5rem;
    }
    
    .nav-container {
        height: 60px;
    }
    
    .main-content {
        padding-top: 60px;
    }
    
    .hero h1 {
        font-size: 1.75rem;
    }
    
    .hero p {
        font-size: var(--text-sm);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: var(--text-xl);
    }
    
    .course-card {
        max-width: 100%;
    }
    
    .course-thumbnail {
        height: 160px;
    }
    
    .auth-logo {
        width: 60px;
        height: 60px;
    }
    
    .auth-logo i {
        font-size: var(--text-2xl);
    }
    
    .auth-header h1 {
        font-size: var(--text-xl);
    }
    
    .flash-message {
        left: var(--spacing-md);
        right: var(--spacing-md);
        transform: none;
        width: auto;
    }
    
    .dropdown-menu {
        min-width: auto;
    }
    
    .form-check {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
}

/* Extra Small Devices (< 400px) */
@media (max-width: 399px) {
    .hero h1 {
        font-size: 1.5rem;
    }
    
    .btn {
        padding: 0.6rem 1rem;
        font-size: var(--text-xs);
    }
    
    .nav-logo span {
        display: none;
    }
    
    .nav-logo {
        font-size: var(--text-lg);
    }
}

/* High Density Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .card,
    .auth-card,
    .navbar {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

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

/* Print Styles */
@media print {
    .navbar,
    .footer,
    .nav-toggle,
    .btn,
    .flash-message {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .main-content {
        padding-top: 0;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
}

/* Dark Mode Preference (already dark, but ensure consistency) */
@media (prefers-color-scheme: light) {
    /* Force dark theme regardless of system preference */
    body {
        background-color: var(--dark-bg);
        color: var(--text-primary);
    }
}

/* Touch Devices */
@media (hover: none) and (pointer: coarse) {
    .btn,
    .nav-link,
    .dropdown-toggle,
    .form-control {
        min-height: 44px;
        min-width: 44px;
    }
    
    .course-card:hover {
        transform: none;
        box-shadow: var(--shadow-lg);
    }
    
    .dropdown-menu {
        display: none;
    }
    
    .dropdown.active .dropdown-menu {
        display: block;
        position: static;
        box-shadow: none;
        border: 1px solid var(--glass-border);
    }
}

/* Landscape orientation for mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .auth-container {
        min-height: auto;
        padding: var(--spacing-lg);
    }
    
    .auth-card {
        max-width: 600px;
        padding: var(--spacing-lg);
    }
    
    .auth-header {
        margin-bottom: var(--spacing-md);
    }
    
    .auth-logo {
        width: 50px;
        height: 50px;
        margin-bottom: var(--spacing-sm);
    }
    
    .auth-features {
        display: none;
    }
}

/* Tablet Portrait */
@media (min-width: 768px) and (max-width: 991px) and (orientation: portrait) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .course-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Large Tablet */
@media (min-width: 992px) and (max-width: 1199px) and (orientation: landscape) {
    .hero {
        min-height: 60vh;
    }
    
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}