/* ============================================
   Responsive Design - Tablets (768px and up)
   ============================================ */

@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2.25rem;
    --font-size-4xl: 1.875rem;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
    
    --space-3xl: 2.5rem;
    --space-4xl: 3rem;
  }
  
  .container {
    padding: 0 var(--space-md);
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero-grid,
  .proof-grid,
  .automation-grid,
  .service-grid,
  .process-grid,
  .split-grid,
  .case-grid,
  .pricing-grid,
  .contact-grid,
  .metric-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    max-width: 560px;
    margin: 0 auto;
  }

  .hero-status-panel {
    right: var(--space-md);
    bottom: var(--space-md);
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  section {
    padding: var(--space-3xl) 0;
  }
  
  section.hero {
    padding: var(--space-3xl) 0;
    min-height: 60vh;
  }
  
  h1 {
    font-size: var(--font-size-4xl);
  }
  
  h2 {
    font-size: var(--font-size-3xl);
  }
  
  h3 {
    font-size: var(--font-size-2xl);
  }
}

/* ============================================
   Responsive Design - Mobile (640px and down)
   ============================================ */

@media (max-width: 640px) {
  :root {
    --font-size-5xl: 1.875rem;
    --font-size-4xl: 1.5rem;
    --font-size-3xl: 1.25rem;
    --font-size-2xl: 1.125rem;
    --font-size-lg: 1rem;
    --font-size-base: 0.875rem;
    
    --space-xl: 1.5rem;
    --space-2xl: 2rem;
    --space-3xl: 2rem;
    --space-4xl: 2rem;
  }
  
  body {
    font-size: var(--font-size-base);
  }
  
  .container {
    padding: 0 var(--space-md);
  }
  
  /* Navigation */
  nav {
    flex-direction: column;
    gap: var(--space-lg);
  }
  
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-lg);
  }

  nav {
    flex-direction: row;
  }

  #mobile-menu {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-lg);
  }
  
  .mobile-hidden {
    display: none;
  }
  
  /* Grid */
  .grid {
    gap: var(--space-lg);
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .grid-2-mobile {
    grid-template-columns: 1fr;
  }
  
  /* Typography */
  h1 {
    font-size: var(--font-size-4xl);
    line-height: 1.1;
  }
  
  h2 {
    font-size: var(--font-size-3xl);
  }
  
  h3 {
    font-size: var(--font-size-2xl);
  }
  
  h4, h5, h6 {
    font-size: var(--font-size-lg);
  }
  
  /* Spacing */
  section {
    padding: var(--space-2xl) 0;
  }
  
  section.hero {
    min-height: auto;
    padding: var(--space-2xl) 0;
  }
  
  .mt, .my {
    margin-top: var(--space-md) !important;
  }
  
  .mb, .my {
    margin-bottom: var(--space-md) !important;
  }
  
  /* Buttons */
  button, .btn {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    font-size: var(--font-size-base);
  }

  .menu-toggle {
    width: 44px;
    flex: 0 0 44px;
  }

  .hero-actions,
  .hero-metrics,
  .result-strip {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    display: grid;
  }

  .hero-status-panel {
    position: static;
    max-width: none;
    margin-top: var(--space-md);
  }

  .section-heading {
    margin-bottom: var(--space-2xl);
  }

  .service-card,
  .process-grid article,
  .automation-panel,
  .content-panel,
  .form-panel,
  .contact-card,
  .faq-item,
  .pricing-card {
    padding: var(--space-lg);
  }
  
  .btn-sm {
    padding: var(--space-sm) var(--space-md);
  }
  
  /* Forms */
  input, textarea, select {
    padding: var(--space-md);
    font-size: 16px; /* Prevents zoom on focus in iOS */
  }
  
  /* Cards */
  .card {
    padding: var(--space-lg);
  }
  
  .card-image {
    height: 150px;
  }
  
  /* Footer */
  footer {
    padding: var(--space-2xl) 0 var(--space-lg);
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .footer-section h3 {
    font-size: var(--font-size-base);
  }
  
  /* Flex utilities for mobile */
  .flex-mobile-col {
    flex-direction: column;
  }
  
  .gap-mobile {
    gap: var(--space-md);
  }
  
  /* Hide on mobile */
  .hide-mobile {
    display: none;
  }
  
  /* Show only on mobile */
  .show-mobile {
    display: block;
  }
}

/* ============================================
   Small Mobile (up to 360px)
   ============================================ */

@media (max-width: 360px) {
  :root {
    --font-size-5xl: 1.5rem;
    --font-size-4xl: 1.25rem;
    --space-xl: 1rem;
    --space-2xl: 1.5rem;
  }
  
  .grid-2-mobile {
    grid-template-columns: 1fr;
  }
  
  button, .btn {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-sm);
  }
}

/* ============================================
   Orientation-specific Styles
   ============================================ */

@media (orientation: landscape) and (max-height: 500px) {
  section.hero {
    min-height: 50vh;
    padding: var(--space-2xl) 0;
  }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
  header, footer, .no-print {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  a {
    text-decoration: underline;
  }
  
  .btn {
    border: 1px solid black;
  }
}

/* ============================================
   High DPI / Retina Display
   ============================================ */

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  /* Thinner borders for high DPI */
  .card {
    border: 0.5px solid rgba(0, 0, 0, 0.05);
  }
}

/* ============================================
   Accessible Color Schemes
   ============================================ */

@media (prefers-color-scheme: dark) {
  body {
    background-color: var(--color-dark);
    color: var(--color-gray-50);
  }
  
  .card {
    background: var(--color-gray-800);
    box-shadow: var(--shadow-md);
  }
  
  input, textarea, select {
    background-color: var(--color-gray-800);
    border-color: var(--color-gray-600);
    color: var(--color-gray-50);
  }
  
  input:focus, textarea:focus, select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
  }
}

/* ============================================
   Reduced Motion
   ============================================ */

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

/* ============================================
   High Contrast Mode
   ============================================ */

@media (prefers-contrast: more) {
  :root {
    --shadow-sm: none;
    --shadow-md: 0 0 0 1px currentColor;
    --shadow-lg: 0 0 0 2px currentColor;
  }
  
  .card {
    border: 2px solid var(--color-gray-800);
  }
  
  button {
    border: 2px solid currentColor;
  }
}