/* ================================================
   ZAN STUDIO - Responsive Navigation System
   Mobile-First Approach with Touch-Friendly Design
   ================================================ */

/* Navigation Variables */
:root {
  --nav-height: 70px;
  --nav-bg: rgba(20, 20, 20, 0.85);
  --nav-border: rgba(255, 255, 255, 0.05);
  --nav-blur: 20px;
  --accent-color: #00ffe1;
  --accent-glow: rgba(0, 255, 225, 0.3);
  --text-primary: #ffffff;
  --text-secondary: #aaaaaa;
  --transition-speed: 0.3s;
  --touch-target-min: 44px;
}

/* ================================================
   BASE NAVIGATION STYLES
   ================================================ */
nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: var(--nav-bg);
  backdrop-filter: blur(var(--nav-blur));
  -webkit-backdrop-filter: blur(var(--nav-blur));
  border-bottom: 1px solid var(--nav-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 1.5rem;
  z-index: 9999;
  transition: all var(--transition-speed) ease;
}

nav.scrolled {
  background: rgba(20, 20, 20, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* Logo Styles */
.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent-color);
  text-decoration: none;
  transition: all var(--transition-speed) ease;
  text-transform: uppercase;
}

.logo:hover {
  text-shadow: 0 0 20px var(--accent-glow);
}

.logo:active {
  transform: scale(0.98);
}

/* ================================================
   MOBILE NAVIGATION (Default - Hidden)
   ================================================ */

/* Hamburger Menu Button */
.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: var(--touch-target-min);
  height: var(--touch-target-min);
  background: rgba(255, 255, 255, 0.05);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  padding: 8px;
  transition: all var(--transition-speed) ease;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.menu-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

.menu-toggle:active {
  background: rgba(0, 255, 225, 0.2);
  transform: scale(0.95);
}

/* Hamburger Lines */
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--accent-color);
  margin: 3px 0;
  border-radius: 2px;
  transition: all var(--transition-speed) ease;
  transform-origin: center;
}

/* Hamburger Animation - X Shape */
.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Navigation Overlay */
.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  z-index: 9998;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-speed) ease;
}

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

/* Mobile Navigation Drawer */
.nav-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 85%;
  max-width: 320px;
  height: 100vh;
  height: 100dvh;
  background: rgba(25, 25, 25, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  padding: calc(var(--nav-height) + 1rem) 1.5rem 2rem;
  padding-bottom: calc(2rem + env(safe-area-inset-bottom));
  transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.5);
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
}

.nav-drawer.active {
  right: 0;
}

/* Close Button in Drawer */
.nav-close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border: none;
  border-radius: 12px;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  transition: all var(--transition-speed) ease;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  z-index: 10;
}

.nav-close-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--accent-color);
}

.nav-close-btn:active {
  transform: scale(0.95);
}

.nav-close-btn i {
  display: flex;
}

/* Fix drawer content layout */
.nav-drawer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-shrink: 0;
}

.nav-drawer-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 1rem 1.25rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 500;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  transition: all var(--transition-speed) ease;
  min-height: var(--touch-target-min);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.nav-drawer-link:hover,
.nav-drawer-link:active {
  color: var(--accent-color);
  background: rgba(0, 255, 225, 0.08);
  transform: translateX(5px);
}

.nav-drawer-link.active {
  color: var(--accent-color);
  background: rgba(0, 255, 225, 0.12);
  border-left: 3px solid var(--accent-color);
}

.nav-drawer-link i {
  font-size: 1.3rem;
  width: 28px;
  text-align: center;
}

/* Mobile Bottom Actions */
.nav-drawer-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 1rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 12px;
  text-decoration: none;
  transition: all var(--transition-speed) ease;
  min-height: var(--touch-target-min);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.nav-action-btn.primary {
  background: linear-gradient(135deg, var(--accent-color), #00d4aa);
  color: #0d0d0d;
  box-shadow: 0 4px 15px rgba(0, 255, 225, 0.3);
}

.nav-action-btn.primary:hover,
.nav-action-btn.primary:active {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 255, 225, 0.4);
}

.nav-action-btn.secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-action-btn.secondary:hover,
.nav-action-btn.secondary:active {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-color);
}

/* ================================================
   DESKTOP NAVIGATION (Hidden by default)
   ================================================ */
.nav-links {
  display: none;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0.75rem 1.25rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
  transition: all var(--transition-speed) ease;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 255, 225, 0.1), transparent);
  transition: left 0.5s ease;
}

.nav-link:hover::before,
.nav-link:focus::before {
  left: 100%;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--accent-color);
  background: rgba(0, 255, 225, 0.05);
  transform: translateY(-2px);
}

.nav-link:active {
  transform: translateY(0) scale(0.98);
}

.nav-link.active {
  color: var(--accent-color);
  background: rgba(0, 255, 225, 0.1);
}

.nav-link i {
  font-size: 1rem;
  transition: transform var(--transition-speed) ease;
}

.nav-link:hover i {
  transform: rotate(180deg);
}

/* Dropdown Menu */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: rgba(25, 25, 25, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.75rem;
  margin-top: 10px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-speed) ease;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
  z-index: 1000;
}

.nav-link:hover .nav-dropdown,
.nav-link:focus .nav-dropdown,
.nav-link.dropdown-open .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0.85rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  border-radius: 8px;
  transition: all var(--transition-speed) ease;
  min-height: var(--touch-target-min);
}

.nav-dropdown-link:hover,
.nav-dropdown-link:focus {
  color: var(--accent-color);
  background: rgba(0, 255, 225, 0.08);
}

.nav-dropdown-link i {
  font-size: 1.1rem;
  color: var(--accent-color);
}

/* Desktop CTA Button */
.nav-cta {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0.75rem 1.5rem;
  background: linear-gradient(135deg, var(--accent-color), #00d4aa);
  color: #0d0d0d;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 10px;
  text-decoration: none;
  transition: all var(--transition-speed) ease;
  box-shadow: 0 4px 15px rgba(0, 255, 225, 0.3);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 255, 225, 0.4);
}

.nav-cta:active {
  transform: scale(0.98);
}

/* ================================================
   TABLET STYLES (768px and up)
   ================================================ */
@media (min-width: 768px) {
  nav {
    padding: 0 2rem;
  }

  .nav-drawer {
    width: 60%;
    max-width: 400px;
  }

  .nav-drawer-link {
    font-size: 1.2rem;
    padding: 1.1rem 1.5rem;
  }

  .nav-action-btn {
    font-size: 1.05rem;
    padding: 1.1rem;
  }
}

/* ================================================
   DESKTOP STYLES (1024px and up)
   ================================================ */
@media (min-width: 1024px) {
  /* Hide Mobile Elements */
  .menu-toggle,
  .nav-overlay,
  .nav-drawer {
    display: none !important;
  }

  /* Show Desktop Navigation */
  nav {
    padding: 0 3rem;
    justify-content: space-between;
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .nav-cta {
    display: flex;
  }

  .logo {
    font-size: 1.6rem;
  }

  /* Desktop Hover Effects */
  .nav-link {
    padding: 0.6rem 1rem;
  }

  .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: all var(--transition-speed) ease;
    transform: translateX(-50%);
    border-radius: 2px;
  }

  .nav-link:hover::after,
  .nav-link.active::after {
    width: 60%;
  }
}

/* ================================================
   LARGE DESKTOP (1280px and up)
   ================================================ */
@media (min-width: 1280px) {
  nav {
    padding: 0 4rem;
  }

  .nav-link {
    padding: 0.7rem 1.25rem;
    font-size: 1rem;
  }

  .logo {
    font-size: 1.8rem;
  }
}

/* ================================================
   ACCESSIBILITY IMPROVEMENTS
   ================================================ */

/* Focus Styles */
.nav-link:focus,
.menu-toggle:focus,
.nav-drawer-link:focus,
.nav-dropdown-link:focus,
.nav-action-btn:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* Skip to Main Content Link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  padding: 1rem 2rem;
  background: var(--accent-color);
  color: #0d0d0d;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 10px 10px;
  z-index: 10001;
  transition: top var(--transition-speed) ease;
}

.skip-link:focus {
  top: 0;
}

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

/* High Contrast Mode */
@media (prefers-contrast: high) {
  nav {
    background: #000000;
    border-bottom: 2px solid #ffffff;
  }

  .nav-link,
  .nav-drawer-link {
    color: #ffffff;
  }

  .logo,
  .menu-toggle span {
    color: #00ffe1;
  }
}

/* ================================================
   SWIPE GESTURES SUPPORT
   ================================================ */
@media (hover: none) and (pointer: coarse) {
  .nav-drawer {
    touch-action: pan-x;
  }

  .nav-drawer-link,
  .nav-action-btn {
    min-height: 52px; /* Larger touch target for mobile */
  }
}

/* ================================================
   SCROLL-BASED NAVIGATION EFFECTS
   ================================================ */
@media (min-width: 1024px) {
  nav.scroll-effect {
    height: 60px;
    background: rgba(20, 20, 20, 0.95);
  }

  nav.scroll-effect .logo {
    font-size: 1.4rem;
  }

  nav.scroll-effect .nav-link {
    padding: 0.5rem 0.9rem;
    font-size: 0.9rem;
  }

  nav.scroll-effect .nav-cta {
    padding: 0.6rem 1.25rem;
    font-size: 0.85rem;
  }
}

/* ================================================
   NAVIGATION ANIMATIONS
   ================================================ */
@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.nav-drawer.active .nav-drawer-links .nav-drawer-link {
  animation: slideInRight 0.4s ease forwards;
  opacity: 0;
}

.nav-drawer.active .nav-drawer-links .nav-drawer-link:nth-child(1) {
  animation-delay: 0.1s;
}

.nav-drawer.active .nav-drawer-links .nav-drawer-link:nth-child(2) {
  animation-delay: 0.15s;
}

.nav-drawer.active .nav-drawer-links .nav-drawer-link:nth-child(3) {
  animation-delay: 0.2s;
}

.nav-drawer.active .nav-drawer-links .nav-drawer-link:nth-child(4) {
  animation-delay: 0.25s;
}

.nav-drawer.active .nav-drawer-links .nav-drawer-link:nth-child(5) {
  animation-delay: 0.3s;
}

.nav-drawer.active .nav-drawer-actions {
  animation: fadeIn 0.4s ease 0.35s forwards;
  opacity: 0;
}