/**
 * Tech Arabi - Mobile Responsive Styles
 * Mobile-first approach
 */

/* ============================================
   Base Mobile Fixes
   ============================================ */

* {
    -webkit-tap-highlight-color: transparent;
    -webkit-text-size-adjust: 100%;
}

html {
    -webkit-overflow-scrolling: touch;
}

body {
    overflow-x: hidden;
    width: 100%;
    min-height: 100vh;
}

img, video, iframe {
    max-width: 100%;
    height: auto;
}

/* ============================================
   Tablet Styles (max-width: 1024px)
   ============================================ */

@media screen and (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }

    /* Stats grid */
    .stats .container {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Hero */
    .hero h1 {
        font-size: 2.5rem;
    }

    /* Features */
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* About */
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-image {
        order: -1;
    }

    /* Footer */
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }

    /* Lesson layout */
    .lesson-layout {
        grid-template-columns: 1fr;
    }

    .lesson-toc {
        display: none;
    }
}

/* ============================================
   Mobile Styles (max-width: 768px)
   ============================================ */

@media screen and (max-width: 768px) {
    :root {
        --navbar-height: 60px;
    }

    .container {
        padding: 0 16px;
    }

    /* ---- Navbar ---- */
    .navbar {
        padding: 0;
    }

    .navbar .container {
        padding: 0 16px;
    }

    .nav-links,
    .auth-buttons {
        display: none !important;
    }

    .nav-actions {
        gap: 8px;
    }

    .mobile-menu-btn {
        display: flex !important;
        order: 3;
    }

    .mobile-nav,
    .mobile-nav-overlay {
        display: block !important;
    }

    /* Mobile auth buttons in nav */
    .mobile-auth-buttons {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }

    .mobile-auth-buttons .btn {
        width: 100%;
        text-align: center;
        justify-content: center;
    }

    /* Logo */
    .logo {
        gap: 6px;
    }

    .logo-img {
        height: 38px;
        max-width: 150px;
    }

    /* Fallback text logo styles */
    .logo.text-logo .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }

    .logo-text-main {
        font-size: 1.15rem;
    }

    .logo-text-sub {
        display: none;
    }

    /* Theme toggle */
    .theme-toggle {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }

    /* ---- Hero Section ---- */
    .hero {
        padding: 50px 0 70px;
    }

    .hero-badge {
        font-size: 0.75rem;
        padding: 6px 12px;
        margin-bottom: 16px;
    }

    .hero h1 {
        font-size: 1.6rem;
        line-height: 1.4;
        margin-bottom: 16px;
    }

    .hero p {
        font-size: 0.95rem;
        line-height: 1.7;
        margin-bottom: 24px;
        padding: 0 8px;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 12px;
        padding: 0 16px;
    }

    .hero-buttons .btn {
        width: 100%;
        padding: 14px 24px;
    }

    .hero-stats {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 24px;
        margin-top: 40px;
        padding-top: 24px;
        justify-content: center;
    }

    .hero-stat {
        min-width: 70px;
    }

    .hero-stat-number {
        font-size: 1.6rem;
    }

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

    /* ---- Courses Section ---- */
    .courses-section {
        padding: 50px 0;
    }

    .courses-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .course-card {
        padding: 24px 20px;
    }

    .course-icon {
        width: 60px;
        height: 60px;
        font-size: 1.2rem;
        margin-bottom: 16px;
    }

    .course-card h3 {
        font-size: 1.2rem;
        margin-bottom: 8px;
    }

    .course-card p {
        font-size: 0.9rem;
        margin-bottom: 16px;
    }

    .course-stats {
        gap: 16px;
        margin-bottom: 20px;
    }

    .course-stat-value {
        font-size: 1.1rem;
    }

    .course-stat-label {
        font-size: 0.75rem;
    }

    /* ---- Stats Section ---- */
    .stats {
        margin-top: -35px;
        padding-bottom: 40px;
    }

    .stats .container {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .stat-card {
        padding: 16px;
        text-align: center;
    }

    .stat-icon {
        width: 45px;
        height: 45px;
        margin-bottom: 10px;
    }

    .stat-icon svg {
        width: 20px;
        height: 20px;
    }

    .stat-number {
        font-size: 1.6rem;
    }

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

    /* ---- Lessons Section ---- */
    .lessons-section {
        padding: 50px 0;
    }

    .section-header {
        margin-bottom: 32px;
    }

    .section-header h2 {
        font-size: 1.4rem;
        margin-bottom: 8px;
    }

    .section-header p {
        font-size: 0.9rem;
    }

    /* Modules */
    .module {
        margin-bottom: 32px;
    }

    .module-header {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
        padding-bottom: 12px;
    }

    .module-title {
        font-size: 1rem;
        flex-wrap: wrap;
        gap: 8px;
    }

    .module-icon {
        width: 36px;
        height: 36px;
        font-size: 0.85rem;
        flex-shrink: 0;
    }

    .module-title > span[style] {
        font-size: 0.65rem !important;
        padding: 2px 6px !important;
    }

    .module-progress {
        width: 100%;
        justify-content: space-between;
    }

    .module-progress-bar {
        flex: 1;
        max-width: 140px;
    }

    /* Lessons Grid */
    .lessons-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .lesson-card {
        padding: 14px;
        gap: 12px;
    }

    .lesson-number {
        width: 42px;
        height: 42px;
        font-size: 0.9rem;
        flex-shrink: 0;
    }

    .lesson-content h4 {
        font-size: 0.95rem;
        margin-bottom: 4px;
    }

    .lesson-content p {
        font-size: 0.8rem;
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .lesson-meta {
        margin-top: 8px;
        gap: 10px;
        font-size: 0.7rem;
    }

    .lesson-status {
        width: 22px;
        height: 22px;
    }

    .free-badge {
        font-size: 0.65rem;
        padding: 2px 6px;
        top: 8px;
        left: 8px;
    }

    /* ---- CTA Section ---- */
    .cta-section {
        padding: 50px 0;
    }

    .cta-section h2 {
        font-size: 1.4rem;
        margin-bottom: 12px;
    }

    .cta-section p {
        font-size: 0.9rem;
        padding: 0 16px;
        margin-bottom: 24px;
    }

    .cta-buttons {
        flex-direction: column;
        gap: 12px;
        padding: 0 16px;
    }

    .cta-buttons .btn {
        width: 100%;
    }

    /* ---- Features Section ---- */
    .features-section {
        padding: 50px 0;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .feature-card {
        padding: 24px 20px;
    }

    .feature-icon {
        width: 56px;
        height: 56px;
        margin-bottom: 16px;
    }

    .feature-icon svg {
        width: 26px;
        height: 26px;
    }

    .feature-card h3 {
        font-size: 1.1rem;
        margin-bottom: 8px;
    }

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

    /* ---- Footer ---- */
    .footer {
        padding: 40px 0 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: center;
    }

    .footer-brand {
        max-width: 100%;
    }

    .footer-brand .logo {
        justify-content: center;
    }

    .footer-section h4 {
        margin-bottom: 12px;
    }

    .footer-section ul {
        gap: 8px;
    }

    .footer-bottom {
        padding-top: 20px;
        font-size: 0.8rem;
    }

    /* ---- Ad Containers ---- */
    .ad-container {
        margin: 24px 0;
    }

    .ad-between-sections {
        padding: 16px 0;
    }

    .ad-slot {
        min-height: 50px;
    }

    /* ---- Buttons ---- */
    .btn {
        padding: 12px 24px;
        font-size: 0.95rem;
    }

    .btn-lg {
        padding: 14px 28px;
        font-size: 1rem;
    }

    .btn-sm {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
}

/* ============================================
   Small Mobile Styles (max-width: 480px)
   ============================================ */

@media screen and (max-width: 480px) {
    .container {
        padding: 0 12px;
    }

    /* Logo - smaller on very small screens */
    .logo-img {
        height: 32px;
        max-width: 130px;
    }

    /* Hero */
    .hero {
        padding: 40px 0 60px;
    }

    .hero h1 {
        font-size: 1.4rem;
    }

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

    .hero-stats {
        gap: 16px;
    }

    .hero-stat-number {
        font-size: 1.4rem;
    }

    /* Stats - single column */
    .stats .container {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .stat-card {
        flex-direction: row;
        justify-content: flex-start;
        gap: 16px;
        text-align: right;
    }

    .stat-icon {
        margin: 0;
        width: 42px;
        height: 42px;
    }

    .stat-content {
        flex: 1;
    }

    .stat-number {
        font-size: 1.4rem;
    }

    /* Module title */
    .module-title {
        font-size: 0.9rem;
    }

    .module-icon {
        width: 32px;
        height: 32px;
        font-size: 0.8rem;
    }

    /* Lessons */
    .lesson-card {
        padding: 12px;
    }

    .lesson-number {
        width: 38px;
        height: 38px;
        font-size: 0.85rem;
    }

    .lesson-content h4 {
        font-size: 0.9rem;
    }

    /* About features */
    .about-features {
        grid-template-columns: 1fr;
    }

    /* Section headers */
    .section-header h2 {
        font-size: 1.3rem;
    }
}

/* ============================================
   Lesson Page Mobile Styles
   ============================================ */

@media screen and (max-width: 768px) {
    .lesson-header {
        padding: 24px 0;
    }

    .lesson-header .container {
        flex-direction: column;
        gap: 16px;
    }

    .lesson-badge {
        font-size: 0.75rem;
        padding: 4px 12px;
    }

    .lesson-info h1 {
        font-size: 1.4rem;
        line-height: 1.4;
    }

    .lesson-body {
        padding: 24px 0;
    }

    .lesson-text {
        font-size: 1rem;
        line-height: 1.8;
    }

    .lesson-text h2 {
        font-size: 1.3rem;
        margin: 32px 0 16px;
    }

    .lesson-text h3 {
        font-size: 1.15rem;
        margin: 24px 0 12px;
    }

    .lesson-text ul,
    .lesson-text ol {
        padding-right: 20px;
    }

    /* Code blocks - full width */
    .code-block {
        margin: 20px -16px;
        border-radius: 0;
    }

    .code-block-header {
        padding: 10px 16px;
    }

    .code-lang {
        font-size: 0.7rem;
    }

    .copy-btn {
        padding: 6px 10px;
        font-size: 0.75rem;
    }

    .code-block pre {
        padding: 14px 16px;
    }

    .code-block code {
        font-size: 0.8rem;
        line-height: 1.6;
    }

    /* Info boxes */
    .info-box {
        padding: 16px;
        margin: 20px 0;
    }

    .info-box-title {
        font-size: 0.95rem;
    }

    /* Quiz */
    .quiz-section {
        padding: 20px 16px;
        margin: 24px -16px;
        border-radius: 0;
    }

    .quiz-section h3 {
        font-size: 1.1rem;
    }

    .quiz-question {
        padding: 14px;
        margin-bottom: 12px;
    }

    .quiz-question-text {
        font-size: 0.95rem;
    }

    .quiz-option {
        padding: 10px 12px;
        font-size: 0.9rem;
    }

    .quiz-option-marker {
        width: 20px;
        height: 20px;
    }

    /* Exercise */
    .exercise-box {
        padding: 16px;
        margin: 24px 0;
    }

    .exercise-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .exercise-title {
        font-size: 1rem;
    }

    .exercise-actions {
        flex-direction: column;
        width: 100%;
    }

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

    /* Tables - horizontal scroll */
    .result-table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin: 16px -16px;
        width: calc(100% + 32px);
    }

    .result-table table {
        min-width: 500px;
    }

    .result-table th,
    .result-table td {
        padding: 10px 12px;
        font-size: 0.85rem;
        white-space: nowrap;
    }

    /* Diagrams */
    .sql-diagram {
        padding: 20px 12px;
        margin: 20px -16px;
        border-radius: 0;
    }

    .venn-circles {
        transform: scale(0.7);
        transform-origin: center;
    }

    /* Lesson navigation */
    .lesson-nav {
        flex-direction: column;
        gap: 12px;
        margin-top: 32px;
        padding-top: 24px;
    }

    .nav-btn {
        max-width: 100%;
        width: 100%;
        justify-content: center;
        padding: 12px 16px;
    }

    .nav-btn-label {
        font-size: 0.75rem;
    }

    .nav-btn-title {
        font-size: 0.9rem;
    }

    /* Complete section */
    .complete-section {
        padding: 24px 16px;
        margin: 24px 0;
    }

    .complete-section p {
        font-size: 1rem;
    }

    .complete-btn {
        padding: 12px 24px;
        font-size: 1rem;
        width: 100%;
    }
}

/* ============================================
   Touch-friendly improvements
   ============================================ */

@media (hover: none) and (pointer: coarse) {
    /* Larger touch targets */
    .btn {
        min-height: 44px;
    }

    .lesson-card {
        min-height: 80px;
    }

    .quiz-option {
        min-height: 48px;
    }

    .nav-links a {
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    /* Remove hover effects on touch */
    .lesson-card:hover {
        transform: none;
    }

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

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

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

/* ============================================
   Landscape mobile
   ============================================ */

@media screen and (max-width: 768px) and (orientation: landscape) {
    .hero {
        padding: 30px 0 50px;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .hero-stats {
        margin-top: 24px;
        padding-top: 16px;
    }
}

/* ============================================
   Safe area insets (for notched phones)
   ============================================ */

@supports (padding: max(0px)) {
    .navbar {
        padding-left: max(16px, env(safe-area-inset-left));
        padding-right: max(16px, env(safe-area-inset-right));
    }

    .footer {
        padding-bottom: max(20px, env(safe-area-inset-bottom));
    }

    .mobile-nav {
        padding-bottom: max(24px, env(safe-area-inset-bottom));
    }
}

/* ============================================
   Print - hide mobile elements
   ============================================ */

@media print {
    .mobile-menu-btn,
    .mobile-nav,
    .mobile-nav-overlay {
        display: none !important;
    }
}