/* Mobile Optimization CSS - Comprehensive Mobile Responsiveness */

/* Mobile-First Approach - Base styles for mobile */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Enhanced Mobile Typography */
body {
    font-size: 16px;
    line-height: 1.6;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Touch-friendly button sizes */
.btn,
.auth-btn,
.cta-button {
    min-height: 44px;
    min-width: 44px;
    padding: 12px 20px;
    font-size: 16px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

/* Mobile Navigation Enhancements */
@media (max-width: 768px) {

    /* Header optimizations */
    header {
        padding: 0;
    }

    .nav-container {
        padding: 0 15px;
        min-height: 60px;
    }

    .nav-logo {
        font-size: 18px;
    }

    .nav-logo i {
        font-size: 20px;
    }

    /* Mobile menu button */
    .mobile-menu-btn {
        display: block;
        padding: 12px;
        font-size: 20px;
    }

    /* Mobile navigation */
    .mobile-nav {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
        z-index: 999;
        max-height: calc(100vh - 60px);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .mobile-nav-menu {
        padding: 20px 15px;
    }

    .mobile-nav-menu .nav-link {
        display: block;
        padding: 15px 20px;
        margin: 5px 0;
        border-radius: 8px;
        font-size: 16px;
        text-align: center;
    }

    /* Hide desktop navigation */
    .nav-menu {
        display: none;
    }

    .auth-buttons {
        display: none;
    }
}

/* Mobile Hero Section */
@media (max-width: 768px) {
    .hero {
        padding: 60px 0;
        background-attachment: scroll;
        /* Better performance on mobile */
    }

    .hero-content {
        padding: 0 20px;
    }

    .hero h1 {
        font-size: 2rem;
        line-height: 1.2;
        margin-bottom: 15px;
    }

    .hero p {
        font-size: 1rem;
        margin-bottom: 25px;
    }

    .hero .btn {
        width: 100%;
        max-width: 280px;
        margin: 0 auto;
        display: block;
    }
}

/* Mobile Features Grid */
@media (max-width: 768px) {
    .features {
        grid-template-columns: 1fr;
        gap: 20px;
        margin: 30px 0;
    }

    .feature-card {
        margin: 0 10px;
    }

    .feature-img {
        height: 200px;
    }

    .feature-content {
        padding: 20px 15px;
    }

    .feature-content h3 {
        font-size: 1.2rem;
        margin-bottom: 10px;
    }

    .feature-content p {
        font-size: 0.9rem;
        line-height: 1.5;
    }
}

/* Mobile Innovation Section */
@media (max-width: 768px) {
    .container1 {
        margin: 40px auto;
        padding: 0 15px;
    }

    .section {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .left-side {
        padding: 30px 20px;
        text-align: center;
    }

    .left-side h2 {
        font-size: 1.8rem;
        margin-bottom: 15px;
    }

    .description {
        font-size: 1rem;
        margin-bottom: 25px;
    }

    .cta-button {
        width: 100%;
        max-width: 250px;
        margin: 0 auto;
    }

    .stats {
        justify-content: center;
        gap: 25px;
        flex-wrap: wrap;
    }

    .stat-item {
        min-width: 80px;
    }

    .stat-number {
        font-size: 1.8rem;
    }

    .stat-label {
        font-size: 0.8rem;
    }

    .right-side {
        padding: 20px;
    }

    .image-container {
        height: 250px;
        gap: 15px;
    }

    .image-card {
        border-radius: 8px;
    }

    .image-card img {
        height: 120px;
    }

    .image-caption {
        padding: 10px;
        font-size: 0.8rem;
    }
}

/* Mobile Premium Section */
@media (max-width: 768px) {
    .premium {
        padding: 40px 20px;
        margin: 30px 15px;
        border-radius: 8px;
    }

    .premium h2 {
        font-size: 1.5rem;
        margin-bottom: 15px;
    }

    .premium p {
        font-size: 1rem;
        margin-bottom: 25px;
    }

    .premium .btn {
        width: 100%;
        max-width: 250px;
    }
}

/* Mobile Footer */
@media (max-width: 768px) {
    footer {
        padding: 40px 0 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 25px;
        text-align: center;
    }

    .footer-column h3 {
        font-size: 1.2rem;
        margin-bottom: 15px;
    }

    .footer-column ul li {
        margin-bottom: 8px;
    }

    .social-links {
        justify-content: center;
        gap: 15px;
    }

    .social-links a {
        width: 45px;
        height: 45px;
    }
}

/* Mobile Forms */
@media (max-width: 768px) {
    .form-group {
        margin-bottom: 20px;
    }

    .form-control {
        width: 100%;
        padding: 15px;
        font-size: 16px;
        /* Prevents zoom on iOS */
        border-radius: 8px;
    }

    .form-control:focus {
        outline: none;
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.1);
    }

    textarea.form-control {
        min-height: 120px;
        resize: vertical;
    }

    .btn-submit {
        width: 100%;
        padding: 15px;
        font-size: 16px;
    }
}

/* Mobile Tables */
@media (max-width: 768px) {
    .table-responsive {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    table {
        min-width: 600px;
    }

    th,
    td {
        padding: 8px 4px;
        font-size: 0.9rem;
    }
}

/* Mobile Cards */
@media (max-width: 768px) {
    .card {
        margin: 10px 0;
        border-radius: 8px;
    }

    .card-header {
        padding: 15px;
        font-size: 1.1rem;
    }

    .card-body {
        padding: 15px;
    }

    .card-footer {
        padding: 15px;
    }
}

/* Mobile Modals */
@media (max-width: 768px) {
    .modal-dialog {
        margin: 10px;
        max-width: calc(100% - 20px);
    }

    .modal-content {
        border-radius: 8px;
    }

    .modal-header {
        padding: 15px;
    }

    .modal-body {
        padding: 15px;
    }

    .modal-footer {
        padding: 15px;
    }
}

/* Mobile Gallery */
@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .gallery-item {
        aspect-ratio: 1;
    }

    .gallery-item img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
}

/* Mobile Blog */
@media (max-width: 768px) {
    .blog-card {
        margin: 15px 0;
    }

    .blog-card .card-img-top {
        height: 200px;
    }

    .blog-card .card-title {
        font-size: 1.1rem;
        line-height: 1.3;
    }

    .blog-card .card-text {
        font-size: 0.9rem;
        line-height: 1.5;
    }
}

/* Mobile Study Materials */
@media (max-width: 768px) {
    .material-card {
        margin: 10px 0;
    }

    .material-card .card-img-top {
        height: 150px;
    }

    .material-info {
        padding: 15px;
    }

    .material-title {
        font-size: 1rem;
        line-height: 1.3;
    }

    .material-meta {
        font-size: 0.8rem;
    }
}

/* Mobile Contact Form */
@media (max-width: 768px) {
    .contact-form {
        padding: 20px 15px;
    }

    .contact-info {
        margin-top: 30px;
        text-align: center;
    }

    .contact-item {
        margin: 15px 0;
    }

    .contact-item i {
        font-size: 1.2rem;
        margin-right: 10px;
    }
}

/* Mobile Performance Optimizations */
@media (max-width: 768px) {

    /* Reduce animations for better performance */
    .feature-card:hover {
        transform: none;
    }

    .image-card:hover {
        transform: none;
    }

    /* Optimize images */
    img {
        max-width: 100%;
        height: auto;
    }

    /* Reduce shadows for better performance */
    .feature-card,
    .image-card,
    .card {
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }
}

/* Extra Small Devices */
@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }

    .nav-container {
        padding: 0 10px;
    }

    .nav-logo {
        font-size: 16px;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero p {
        font-size: 0.9rem;
    }

    .left-side h2 {
        font-size: 1.5rem;
    }

    .description {
        font-size: 0.9rem;
    }

    .stats {
        gap: 20px;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .feature-content h3 {
        font-size: 1.1rem;
    }

    .feature-content p {
        font-size: 0.85rem;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
}

/* Landscape Mobile */
@media (max-width: 768px) and (orientation: landscape) {
    .hero {
        padding: 40px 0;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero p {
        font-size: 0.9rem;
    }

    .mobile-nav {
        max-height: calc(100vh - 60px);
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {

    /* Remove hover effects on touch devices */
    .feature-card:hover,
    .image-card:hover,
    .btn:hover {
        transform: none;
    }

    /* Increase touch targets */
    .nav-link,
    .btn,
    .auth-btn {
        min-height: 48px;
        min-width: 48px;
    }

    /* Improve touch feedback */
    .btn:active,
    .nav-link:active {
        transform: scale(0.98);
        transition: transform 0.1s;
    }
}

/* High DPI Display Optimizations */
@media (-webkit-min-device-pixel-ratio: 2),
(min-resolution: 192dpi) {

    /* Optimize for retina displays */
    .nav-logo i,
    .mobile-menu-btn {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

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

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --primary: #5a7fb5;
        --secondary: #266198;
        --accent: #5fd3b1;
        --light: #2a2a2a;
        --dark: #f0f0f0;
        --border: #404040;
    }

    body {
        background-color: #1a1a1a;
        color: #f0f0f0;
    }

    .feature-card,
    .card {
        background: #2a2a2a;
        color: #f0f0f0;
    }

    .form-control {
        background: #2a2a2a;
        color: #f0f0f0;
        border-color: #404040;
    }
}

/* Print Styles */
@media print {

    .mobile-menu-btn,
    .mobile-nav,
    .auth-buttons {
        display: none !important;
    }

    .nav-container {
        justify-content: center;
    }

    .hero {
        background: none !important;
        color: #000 !important;
    }

    .feature-card,
    .card {
        box-shadow: none !important;
        border: 1px solid #ccc;
    }
}