/* ============================================
   RESPONSIVE DESIGN - Mobile-First Approach
   ============================================ */

/* === Mobile Optimizations (Default) === */
/* Base styles are mobile-first */

/* === Tablet (768px and up) === */
@media (max-width: 768px) {

    /* Navigation */
    .navbar-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--bg-primary);
        border-top: 1px solid var(--border-color);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
    }

    .navbar-menu.active {
        display: flex;
    }

    .navbar-toggle {
        display: block;
    }

    /* Hero */
    .hero h1 {
        font-size: var(--font-size-3xl);
    }

    .hero p {
        font-size: var(--font-size-lg);
    }

    /* Typography */
    h1 {
        font-size: var(--font-size-3xl);
    }

    h2 {
        font-size: var(--font-size-2xl);
    }

    h3 {
        font-size: var(--font-size-xl);
    }

    /* Grids */
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    /* Spacing */
    .section {
        padding: var(--spacing-2xl) 0;
    }

    /* MCQ Preview */
    .mcq-preview {
        padding: var(--spacing-lg);
    }

    .mcq-question {
        padding: var(--spacing-md);
    }

    /* App CTA */
    .app-cta {
        padding: var(--spacing-lg);
    }

    .app-stores {
        flex-direction: column;
    }

    .app-store-badge {
        width: 100%;
    }

    /* Buttons */
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }

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

    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

/* === Small Mobile (480px and down) === */
@media (max-width: 480px) {
    :root {
        --spacing-3xl: 2.5rem;
        --spacing-2xl: 2rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero h1 {
        font-size: var(--font-size-2xl);
    }

    .hero p {
        font-size: var(--font-size-base);
    }

    .card {
        padding: var(--spacing-md);
    }

    .mcq-preview-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
}

/* === Large Screens (1024px and up) === */
@media (min-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* === Extra Large Screens (1280px and up) === */
@media (min-width: 1280px) {
    .hero h1 {
        font-size: 3.5rem;
    }
}

/* === Print Styles === */
@media print {

    .navbar,
    .footer,
    .app-cta,
    .ad-zone,
    .btn {
        display: none;
    }

    .mcq-preview {
        border: 1px solid #000;
        page-break-inside: avoid;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
    }
}

/* === Reduced Motion (Accessibility) === */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* === Dark Mode Support (Optional) === */
@media (prefers-color-scheme: dark) {
    /* Uncomment to enable dark mode */
    /*
  :root {
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-light: #9ca3af;
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-tertiary: #374151;
    --border-color: #374151;
    --border-light: #4b5563;
  }
  
  .navbar {
    background-color: var(--bg-secondary);
  }
  
  .card {
    background-color: var(--bg-secondary);
  }
  */
}

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

    /* Larger touch targets for mobile */
    .btn {
        min-height: 44px;
        min-width: 44px;
    }

    .navbar-menu a {
        padding: var(--spacing-md);
        display: block;
    }

    .mcq-option {
        padding: var(--spacing-lg);
    }
}