/* ============================================
   ZIYO INTERNATIONAL - MOBILE ENHANCEMENTS
   Dedicated mobile-first responsive styles
   Version: 2.0 | January 2026
   ============================================ */

/* ============================================
   1. MOBILE NAVIGATION
   ============================================ */

/* Mobile Menu Overlay */
.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 999;
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Mobile Menu Content */
.mobile-menu-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  padding: 80px 20px;
}

.mobile-menu-nav {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: center;
}

.mobile-menu-nav li {
  margin: 0;
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-menu-overlay.active .mobile-menu-nav li {
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu-overlay.active .mobile-menu-nav li:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu-overlay.active .mobile-menu-nav li:nth-child(2) { transition-delay: 0.15s; }
.mobile-menu-overlay.active .mobile-menu-nav li:nth-child(3) { transition-delay: 0.2s; }
.mobile-menu-overlay.active .mobile-menu-nav li:nth-child(4) { transition-delay: 0.25s; }
.mobile-menu-overlay.active .mobile-menu-nav li:nth-child(5) { transition-delay: 0.3s; }
.mobile-menu-overlay.active .mobile-menu-nav li:nth-child(6) { transition-delay: 0.35s; }
.mobile-menu-overlay.active .mobile-menu-nav li:nth-child(7) { transition-delay: 0.4s; }

.mobile-menu-nav a {
  display: block;
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 12px 20px;
  text-decoration: none;
  transition: color 0.3s ease;
}

.mobile-menu-nav a:hover,
.mobile-menu-nav a.active {
  color: var(--copper-gold);
}

/* Mobile Menu Toggle (Hamburger) */
.mobile-menu-toggle {
  display: none;
  width: 32px;
  height: 24px;
  position: relative;
  cursor: pointer;
  z-index: 1001;
  background: none;
  border: none;
  padding: 0;
}

.mobile-menu-toggle span {
  display: block;
  position: absolute;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-menu-toggle span:nth-child(1) { top: 0; }
.mobile-menu-toggle span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.mobile-menu-toggle span:nth-child(3) { bottom: 0; }

.mobile-menu-toggle.active span:nth-child(1) {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: translateX(-10px);
}

.mobile-menu-toggle.active span:nth-child(3) {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

@media (max-width: 991.98px) {
  .mobile-menu-toggle {
    display: block;
  }
}

/* ============================================
   2. MOBILE TYPOGRAPHY
   ============================================ */

@media (max-width: 767.98px) {
  /* Fluid typography scaling */
  :root {
    --text-6xl: clamp(2.5rem, 2rem + 4vw, 4rem);
    --text-5xl: clamp(2rem, 1.5rem + 3.5vw, 3.5rem);
    --text-4xl: clamp(1.75rem, 1.25rem + 3vw, 2.5rem);
    --text-3xl: clamp(1.5rem, 1.25rem + 2vw, 2rem);
    --text-2xl: clamp(1.25rem, 1rem + 1.5vw, 1.5rem);
    --text-xl: clamp(1.125rem, 1rem + 0.75vw, 1.25rem);
  }

  h1, .hero-title {
    line-height: 1.15;
    letter-spacing: -0.02em;
  }

  p {
    font-size: 0.9375rem;
    line-height: 1.7;
  }
}

/* ============================================
   3. MOBILE HERO SECTION
   ============================================ */

@media (max-width: 767.98px) {
  .hero {
    min-height: 100svh; /* Use svh for better mobile support */
    padding-top: 100px;
    padding-bottom: 80px;
  }

  .hero-content {
    padding: var(--space-lg);
  }

  .hero-cta {
    flex-direction: column;
    gap: var(--space-md);
  }

  .hero-cta .btn-ziyo {
    width: 100%;
    justify-content: center;
  }

  .scroll-indicator {
    bottom: var(--space-xl);
  }
}

/* ============================================
   4. MOBILE CARDS
   ============================================ */

@media (max-width: 767.98px) {
  .card-ziyo {
    padding: var(--space-lg);
  }

  .feature-card {
    padding: var(--space-xl);
  }

  .feature-card-icon {
    width: 56px;
    height: 56px;
    font-size: 24px;
    margin-bottom: var(--space-md);
  }

  .metric-card {
    padding: var(--space-xl) var(--space-md);
  }

  .metric-card-value {
    font-size: var(--text-3xl);
  }

  /* Project Cards */
  .project-card {
    aspect-ratio: 4/3;
  }

  .project-card-content {
    padding: var(--space-md);
    opacity: 1;
    transform: none;
  }

  .project-card-title {
    font-size: var(--text-lg);
  }
}

/* ============================================
   5. MOBILE METRICS
   ============================================ */

@media (max-width: 575.98px) {
  .metrics-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }

  .metric-item {
    padding: var(--space-md);
  }

  .metric-value {
    font-size: var(--text-2xl);
  }

  .metric-label {
    font-size: var(--text-xs);
  }
}

/* ============================================
   6. MOBILE TIMELINE
   ============================================ */

@media (max-width: 767.98px) {
  .timeline::before {
    left: 15px;
  }

  .timeline-item,
  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    width: 100%;
    padding-left: 45px;
    padding-right: 0;
    margin-left: 0;
    text-align: left;
  }

  .timeline-item .timeline-dot,
  .timeline-item:nth-child(odd) .timeline-dot,
  .timeline-item:nth-child(even) .timeline-dot {
    left: 5px;
    right: auto;
    width: 16px;
    height: 16px;
  }

  .timeline-year {
    font-size: var(--text-xl);
  }
}

/* ============================================
   7. MOBILE FORMS
   ============================================ */

@media (max-width: 767.98px) {
  .form-control-ziyo {
    padding: 14px 16px;
    font-size: 16px; /* Prevent zoom on iOS */
  }

  .form-group {
    margin-bottom: var(--space-md);
  }

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

/* ============================================
   8. MOBILE BUTTONS
   ============================================ */

@media (max-width: 575.98px) {
  .btn-ziyo {
    padding: 14px 24px;
    font-size: var(--text-sm);
    width: 100%;
    justify-content: center;
  }

  .btn-lg {
    padding: 16px 28px;
  }

  .btn-sm {
    padding: 10px 18px;
  }
}

/* ============================================
   9. MOBILE FOOTER
   ============================================ */

@media (max-width: 767.98px) {
  .footer {
    padding: var(--space-3xl) 0 var(--space-xl);
  }

  .footer-brand-name {
    font-size: var(--text-lg);
  }

  .footer-social {
    justify-content: flex-start;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: var(--space-md);
  }

  .footer-legal {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
  }
}

/* ============================================
   10. MOBILE SPACING
   ============================================ */

@media (max-width: 767.98px) {
  .section {
    padding: var(--space-3xl) 0;
  }

  .section-sm {
    padding: var(--space-2xl) 0;
  }

  .container {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  .mb-3xl { margin-bottom: var(--space-2xl); }
  .mb-2xl { margin-bottom: var(--space-xl); }
  .mb-xl { margin-bottom: var(--space-lg); }
}

/* ============================================
   11. MOBILE TOUCH OPTIMIZATIONS
   ============================================ */

@media (max-width: 991.98px) {
  /* Larger touch targets */
  .nav-link-ziyo {
    padding: var(--space-md) !important;
  }

  .footer-links a {
    display: inline-block;
    padding: var(--space-xs) 0;
  }

  .footer-social a {
    width: 48px;
    height: 48px;
  }

  /* Disable hover effects on touch */
  .card-ziyo:hover {
    transform: none;
  }

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

  .tilt-effect:hover {
    transform: none;
  }
}

/* ============================================
   12. MOBILE ANIMATIONS
   ============================================ */

@media (max-width: 767.98px) {
  /* Simplified animations for performance */
  .fade-up {
    transform: translateY(30px);
  }

  .slide-left,
  .slide-right {
    transform: translateY(30px);
  }

  .reveal-left,
  .reveal-right {
    transform: translateY(40px);
  }

  /* Reduce stagger delays */
  .stagger-1 { transition-delay: 0.05s; }
  .stagger-2 { transition-delay: 0.1s; }
  .stagger-3 { transition-delay: 0.15s; }
  .stagger-4 { transition-delay: 0.2s; }
  .stagger-5 { transition-delay: 0.25s; }
  .stagger-6 { transition-delay: 0.3s; }
}

/* ============================================
   13. MOBILE LANDSCAPE
   ============================================ */

@media (max-height: 500px) and (orientation: landscape) {
  .hero {
    min-height: auto;
    padding: 100px 0 60px;
  }

  .hero-title {
    font-size: var(--text-3xl);
  }

  .scroll-indicator {
    display: none;
  }

  .mobile-menu-nav a {
    font-size: 1.25rem;
    padding: 8px 16px;
  }
}

/* ============================================
   14. SAFE AREA SUPPORT (iPhone X+)
   ============================================ */

@supports (padding: max(0px)) {
  .navbar-ziyo {
    padding-top: max(var(--space-md), env(safe-area-inset-top));
    padding-left: max(var(--space-lg), env(safe-area-inset-left));
    padding-right: max(var(--space-lg), env(safe-area-inset-right));
  }

  .footer {
    padding-bottom: max(var(--space-xl), env(safe-area-inset-bottom));
  }

  .mobile-menu-overlay {
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
  }
}

/* ============================================
   15. TABLET SPECIFIC
   ============================================ */

@media (min-width: 768px) and (max-width: 991.98px) {
  .hero-title {
    font-size: var(--text-4xl);
  }

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

  .timeline::before {
    left: 50%;
  }

  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    width: 50%;
  }
}

/* ============================================
   16. PULL TO REFRESH PREVENTION
   ============================================ */

html {
  overscroll-behavior-y: none;
}

body {
  overscroll-behavior-y: none;
}

/* ============================================
   17. MOBILE-SPECIFIC UTILITIES
   ============================================ */

@media (max-width: 767.98px) {
  .hide-mobile { display: none !important; }
  .show-mobile { display: block !important; }
  .show-mobile-flex { display: flex !important; }
  .show-mobile-inline { display: inline !important; }

  .text-center-mobile { text-align: center !important; }
  .text-left-mobile { text-align: left !important; }

  .full-width-mobile { width: 100% !important; }

  .order-first-mobile { order: -1; }
  .order-last-mobile { order: 99; }
}

@media (min-width: 768px) {
  .hide-desktop { display: none !important; }
  .show-desktop { display: block !important; }
}

/* ============================================
   18. SMOOTH SCROLLING FIX
   ============================================ */

@media (max-width: 767.98px) {
  /* Disable smooth scroll on mobile for better performance */
  html {
    scroll-behavior: auto;
  }

  /* Re-enable for anchor links only */
  html:focus-within {
    scroll-behavior: smooth;
  }
}

/* ============================================
   19. DARK MODE SYSTEM PREFERENCE
   ============================================ */

/* Already dark theme, but ensure system preference is respected */
@media (prefers-color-scheme: light) {
  /* Keep dark theme as default, but can add light mode toggle later */
}

/* ============================================
   20. HIGH CONTRAST MODE
   ============================================ */

@media (prefers-contrast: high) {
  .card-ziyo {
    border: 2px solid var(--text-secondary);
  }

  .btn-ziyo {
    border: 2px solid currentColor;
  }

  .form-control-ziyo {
    border: 2px solid var(--text-secondary);
  }
}