/* ============================================
   MOBILE-ENHANCED STYLESHEET
   ============================================
   
   Following mobile-design skill principles:
   - 44-48px minimum touch targets (iOS HIG / Material Design)
   - Thumb zone optimization
   - Fitts' Law for touch
   - Touch gesture support
   - Mobile performance optimization
   
   ============================================ */

/* ============================================
   TOUCH TARGET ENHANCEMENTS
   ============================================ */

/* Ensure ALL interactive elements meet 44-48px minimum */
.btn,
button:not(.mobile-toggle),
a[role="button"] {
  min-height: 48px;
  min-width: 48px;
  /* Visual can be smaller, but hit area must be 48px */
  position: relative;
}

.btn-lg {
  min-height: 56px; /* Critical actions get larger targets */
}

.btn-sm {
  min-height: 44px; /* Even small buttons meet WCAG 2.2 */
  padding: var(--space-3) var(--space-6);
}

/* Mobile navigation links - full width for easier tapping */
@media (max-width: 1024px) {
  .mobile-link {
    min-height: 56px; /* Larger for thumb-friendly tapping */
    display: flex;
    align-items: center;
    padding: var(--space-5) var(--space-4);
  }
  
  .mobile-toggle {
    min-height: 48px;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* Touch-friendly spacing between interactive elements */
.nav-actions .btn + .btn {
  margin-left: var(--space-3); /* 12px minimum spacing */
}

/* Hero CTAs - thumb zone optimized */
@media (max-width: 768px) {
  .hero-cta {
    flex-direction: column;
    width: 100%;
    gap: var(--space-4); /* 16px spacing prevents accidental taps */
  }
  
  .hero-cta .btn {
    width: 100%;
    min-height: 56px; /* Primary CTAs get 56px on mobile */
  }
}

/* Icon buttons - extend hit area beyond visual */
.icon-btn {
  position: relative;
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.icon-btn i {
  font-size: 24px; /* Visual icon can be 24px */
  pointer-events: none; /* Hit area defined by parent */
}

/* Card interactive areas */
.card[onclick],
.card[href],
.card-interactive {
  cursor: pointer;
  min-height: 80px; /* Cards need larger touch targets */
}

/* ============================================
   THUMB ZONE OPTIMIZATION
   ============================================ */

/* Position critical actions in the "natural thumb zone"
   (bottom 1/3 of viewport for one-handed use) */

@media (max-width: 768px) {
  /* Sticky CTA bar for mobile - bottom thumb zone */
  .mobile-sticky-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-4) var(--space-6);
    background: var(--bg-surface);
    backdrop-filter: var(--backdrop-strong);
    border-top: 1px solid var(--border-medium);
    z-index: var(--z-sticky);
    box-shadow: var(--shadow-xl);
    transform: translateY(100px);
    animation: slideUpCTA 0.6s var(--ease-out) 1s forwards;
  }
  
  @keyframes slideUpCTA {
    to { transform: translateY(0); }
  }
  
  .mobile-sticky-cta .btn {
    width: 100%;
    min-height: 56px;
    font-size: var(--text-lg);
    font-weight: var(--weight-bold);
  }
  
  /* Add padding to body to prevent content overlap */
  body.has-sticky-cta {
    padding-bottom: 100px;
  }
  
  /* FAB (Floating Action Button) - positioned for thumb access */
  .fab {
    position: fixed;
    bottom: var(--space-8);
    right: var(--space-6); /* Right for right-handed, left thumb can reach */
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    color: var(--bg-void);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-2xl), var(--shadow-glow);
    z-index: var(--z-fab);
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-out);
  }
  
  .fab:active {
    transform: scale(0.9);
  }
  
  .fab i {
    font-size: 28px;
  }
  
  /* Alternative left-handed positioning */
  .fab.left-handed {
    right: auto;
    left: var(--space-6);
  }
}

/* ============================================
   TOUCH GESTURE SUPPORT
   ============================================ */

/* Swipeable testimonial cards */
.testimonial-track {
  display: flex;
  gap: var(--space-6);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch; /* iOS momentum scrolling */
  scrollbar-width: none; /* Hide scrollbar */
  padding: var(--space-4) 0;
}

.testimonial-track::-webkit-scrollbar {
  display: none; /* Hide scrollbar on WebKit */
}

.testimonial-card {
  flex: 0 0 85%; /* Cards take 85% width for peek effect */
  scroll-snap-align: center;
  scroll-snap-stop: always;
}

@media (min-width: 769px) {
  .testimonial-card {
    flex: 0 0 calc(33.333% - var(--space-4));
  }
}

/* Swipe indicators */
.swipe-indicator {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.swipe-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--border-medium);
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
  /* Extend touch target */
  padding: var(--space-2);
  margin: calc(var(--space-2) * -1);
}

.swipe-dot.active {
  background: var(--brand-primary);
  width: 24px;
}

/* Pull-to-refresh hint (visual only, requires JS) */
.pull-refresh-hint {
  position: absolute;
  top: -60px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-tertiary);
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  transition: top var(--duration-fast) var(--ease-out);
}

.pull-refresh-hint.visible {
  top: 80px;
}

/* ============================================
   MOBILE PERFORMANCE OPTIMIZATIONS
   ============================================ */

/* Reduce animations on mobile for performance */
@media (max-width: 768px) {
  /* Simplify film grain - lighter CPU load */
  body::after {
    opacity: 0.03; /* Reduce from 0.06 */
  }
  
  /* Reduce gradient mesh complexity */
  .atmosphere {
    background: radial-gradient(
      ellipse 80% 50% at 50% -20%,
      rgba(93, 140, 93, 0.15),
      transparent 70%
    );
    /* Remove other gradients on mobile */
  }
  
  /* Disable parallax on mobile - saves battery */
  .parallax-element {
    transform: none !important;
  }
  
  /* Simpler hover states (no transform) */
  .card:hover {
    transform: none;
    border-color: var(--brand-primary);
  }
  
  /* Disable magnetic effect on mobile - not relevant for touch */
  .btn-magnetic:hover {
    transform: none !important;
  }
  
  /* Reduce shadow blur for performance */
  .card-glow:hover {
    box-shadow: var(--shadow-md); /* Lighter than desktop */
  }
}

/* Use simpler animations on low-end devices */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ============================================
   MOBILE TYPOGRAPHY ADJUSTMENTS
   ============================================ */

@media (max-width: 768px) {
  /* Ensure text is readable without zoom (16px minimum) */
  body {
    font-size: 16px; /* iOS won't zoom if 16px+ */
  }
  
  .hero-content h1 {
    font-size: clamp(2.5rem, 12vw, 4rem); /* Smaller range on mobile */
    line-height: 1.1;
  }
  
  .hero-content .lead {
    font-size: var(--text-lg);
    line-height: var(--leading-relaxed);
  }
  
  /* Prevent orphans on mobile */
  h1, h2, h3 {
    text-wrap: balance;
  }
  
  p {
    text-wrap: pretty;
  }
}

/* ============================================
   MOBILE NAVIGATION ENHANCEMENTS
   ============================================ */

@media (max-width: 1024px) {
  /* Make close button more accessible in mobile menu */
  .mobile-menu-close {
    position: absolute;
    top: var(--space-6);
    right: var(--space-6);
    min-width: 48px;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-surface-hover);
    border-radius: var(--radius-full);
    cursor: pointer;
    z-index: 100;
  }
  
  .mobile-menu-close i {
    font-size: 24px;
    color: var(--text-primary);
  }
  
  /* Safe area insets for notched devices (iPhone X+) */
  .navbar {
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
  }
  
  .mobile-menu {
    padding-left: calc(var(--space-8) + env(safe-area-inset-left));
    padding-right: calc(var(--space-8) + env(safe-area-inset-right));
    padding-bottom: calc(var(--space-8) + env(safe-area-inset-bottom));
  }
  
  .mobile-sticky-cta {
    padding-bottom: calc(var(--space-4) + env(safe-area-inset-bottom));
  }
}

/* ============================================
   HAPTIC FEEDBACK INDICATORS
   ============================================ */

/* Visual feedback for haptic-enabled interactions */
@media (hover: none) and (pointer: coarse) {
  /* This targets touch devices */
  
  .btn:active,
  .card-interactive:active,
  .mobile-link:active {
    background: var(--bg-surface-hover);
    transform: scale(0.97);
    transition: transform 0.1s var(--ease-out);
  }
  
  .btn-primary:active {
    transform: scale(0.97) !important;
    filter: brightness(1.1);
  }
  
  /* Ripple effect for Material-style feedback */
  .ripple {
    position: relative;
    overflow: hidden;
  }
  
  .ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.4s, height 0.4s;
  }
  
  .ripple:active::after {
    width: 300px;
    height: 300px;
  }
}

/* ============================================
   MOBILE-SPECIFIC LAYOUT IMPROVEMENTS
   ============================================ */

@media (max-width: 768px) {
  /* Stack cards vertically on mobile */
  .services-grid,
  .features-grid,
  .process-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  
  /* Full-width cards for easier tapping */
  .card {
    width: 100%;
  }
  
  /* Reduce padding on mobile to maximize content area */
  section {
    padding-top: var(--space-16);
    padding-bottom: var(--space-16);
  }
  
  /* Hero spacing adjustments */
  .hero-section {
    padding-top: calc(var(--space-24) + 80px);
    padding-bottom: var(--space-16);
  }
  
  /* Dashboard frame - adapt for mobile */
  .dashboard-frame {
    padding: var(--space-4);
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
  
  .dashboard-stat {
    padding: var(--space-4);
  }
  
  .dashboard-chart {
    height: 100px; /* Smaller charts on mobile */
  }
}

/* ============================================
   LANDSCAPE MOBILE OPTIMIZATION
   ============================================ */

@media (max-width: 926px) and (orientation: landscape) {
  /* Reduce vertical padding in landscape */
  .hero-section {
    padding-top: calc(var(--space-16) + 60px);
    padding-bottom: var(--space-8);
  }
  
  section {
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
  }
  
  /* Hide sticky CTA in landscape to save space */
  .mobile-sticky-cta {
    display: none;
  }
}

/* ============================================
   TOUCH-FRIENDLY FORM INPUTS
   ============================================ */

@media (max-width: 768px) {
  input,
  textarea,
  select {
    min-height: 48px;
    font-size: 16px; /* Prevents iOS zoom on focus */
    padding: var(--space-3) var(--space-4);
  }
  
  textarea {
    min-height: 120px;
  }
  
  /* Larger tap targets for checkboxes/radio */
  input[type="checkbox"],
  input[type="radio"] {
    width: 24px;
    height: 24px;
    /* Create 44px hit area with padding */
    margin: 10px;
  }
  
  label {
    min-height: 44px;
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: var(--space-2) 0;
  }
}

/* ============================================
   ACCESSIBILITY ENHANCEMENTS
   ============================================ */

/* Focus indicators for keyboard navigation (works on mobile too) */
*:focus-visible {
  outline: 3px solid var(--brand-primary);
  outline-offset: 2px;
}

/* Skip to content link for screen readers */
.skip-to-content {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--brand-primary);
  color: var(--bg-void);
  padding: var(--space-3) var(--space-6);
  text-decoration: none;
  z-index: 9999;
  min-height: 48px;
  display: flex;
  align-items: center;
}

.skip-to-content:focus {
  top: 0;
}

/* Ensure color contrast on mobile (OLED screens) */
@media (max-width: 768px) {
  .text-tertiary {
    color: rgba(213, 213, 216, 0.7); /* Slightly brighter for OLED */
  }
}

/* ============================================
   MOBILE NOTIFICATION CARDS
   ============================================ */

@media (max-width: 768px) {
  .notification-card {
    width: calc(100vw - var(--space-12));
    left: var(--space-6);
    right: auto;
    transform: none;
  }
  
  .notification-stack {
    gap: var(--space-3);
  }
}

/* ============================================
   Z-INDEX SCALE FOR MOBILE
   ============================================ */

:root {
  --z-fab: 999;
  --z-sticky: 900;
  --z-tooltip: 1000;
}