/**
 * Enhanced Navigation Styles
 * Modern, responsive navigation with sticky header functionality
 */

/* Header Variables */
.nn-header {
  --header-bg: rgba(26, 26, 46, 0.95);
  --header-bg-solid: #1a1a2e;
  --header-height: 80px;
  --header-height-compact: 64px;
  --nav-link-color: #ffffff;
  --nav-link-hover: #9333ea;
  --nav-cta-bg: linear-gradient(135deg, #9333ea 0%, #ec4899 100%);
  --nav-shadow: 0 4px 24px rgba(26, 26, 46, 0.15);
  --mobile-menu-bg: rgba(26, 26, 46, 0.98);
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Main Header */
.nn-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--header-bg);
  backdrop-filter: blur(20px);
  transition: var(--transition-smooth);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nn-header.nn-header--scrolled {
  background: var(--header-bg-solid);
  box-shadow: var(--nav-shadow);
  transform: translateY(0);
}

.nn-header.nn-header--hidden {
  transform: translateY(-100%);
}

/* Navigation Container */
.nn-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  height: var(--header-height);
  transition: var(--transition-smooth);
}

.nn-header--scrolled .nn-nav {
  height: var(--header-height-compact);
}

/* Logo */
.nn-nav__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--nav-link-color);
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: 700;
  transition: var(--transition-smooth);
  z-index: 1001;
}

.nn-nav__logo:hover {
  color: var(--nav-link-hover);
  transform: scale(1.05);
}

.nn-nav__logo-img {
  width: 32px;
  height: 32px;
  transition: var(--transition-smooth);
  object-fit: contain;
}

.nn-header--scrolled .nn-nav__logo-img {
  width: 28px;
  height: 28px;
}

.nn-nav__logo-text {
  background: linear-gradient(135deg, #ffffff 0%, #9333ea 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Desktop Menu */
.nn-nav__menu {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 2rem;
}

.nn-nav__link {
  position: relative;
  color: var(--nav-link-color);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 0;
  transition: var(--transition-smooth);
  cursor: pointer;
}

.nn-nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--nav-cta-bg);
  transition: width 0.3s ease;
}

.nn-nav__link:hover {
  color: var(--nav-link-hover);
}

.nn-nav__link:hover::after,
.nn-nav__link--active::after {
  width: 100%;
}

/* CTA Button */
.nn-nav__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--nav-cta-bg);
  color: white;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition-smooth);
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.nn-nav__cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.nn-nav__cta:hover::before {
  left: 100%;
}

.nn-nav__cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(147, 51, 234, 0.4);
}

/* Mobile Menu Toggle */
.nn-nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 24px;
  height: 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.nn-nav__toggle-line {
  width: 100%;
  height: 2px;
  background: var(--nav-link-color);
  transition: var(--transition-smooth);
  transform-origin: center;
  display: block;
}

.nn-nav__toggle[aria-expanded="true"] .nn-nav__toggle-line:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
  background: #ffffff;
}

.nn-nav__toggle[aria-expanded="true"] .nn-nav__toggle-line:nth-child(2) {
  opacity: 0;
  transform: scale(0);
}

.nn-nav__toggle[aria-expanded="true"] .nn-nav__toggle-line:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
  background: #ffffff;
}

/* Mobile Menu Overlay */
.nn-nav__overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(26, 26, 46, 0.8);
  backdrop-filter: blur(5px);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-smooth);
  z-index: 999;
}

.nn-nav__overlay--visible {
  opacity: 1;
  visibility: visible;
}

/* Search Bar (Optional Enhancement) */
.nn-nav__search {
  display: flex;
  align-items: center;
  position: relative;
  margin-right: 1rem;
}

.nn-nav__search-input {
  width: 0;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 25px;
  color: white;
  font-size: 0.9rem;
  transition: var(--transition-smooth);
  opacity: 0;
  visibility: hidden;
}

.nn-nav__search-input:focus {
  outline: none;
  border-color: var(--nav-link-hover);
  background: rgba(255, 255, 255, 0.15);
}

.nn-nav__search-input::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

.nn-nav__search--active .nn-nav__search-input {
  width: 200px;
  opacity: 1;
  visibility: visible;
}

.nn-nav__search-toggle {
  background: none;
  border: none;
  color: var(--nav-link-color);
  cursor: pointer;
  padding: 0.5rem;
  font-size: 1.1rem;
  transition: var(--transition-smooth);
}

.nn-nav__search-toggle:hover {
  color: var(--nav-link-hover);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .nn-nav {
    padding: 0 1.5rem;
  }
  
  .nn-nav__menu {
    gap: 1.5rem;
  }
  
  .nn-nav__search {
    display: none;
  }
}

@media (max-width: 768px) {
  /* Show mobile toggle */
  .nn-nav__toggle {
    display: flex;
    position: relative;
    z-index: 1002;
  }
  
  /* Mobile Menu Full Screen */
  .nn-nav__menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--mobile-menu-bg);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    transform: translateX(-100%);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    visibility: hidden;
    z-index: 1001;
    padding: 2rem;
  }
  
  .nn-nav__menu--open {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
  }
  
  /* Mobile Menu Animation States */
  .nn-nav__menu li {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  
  .nn-nav__menu--open li {
    opacity: 1;
    transform: translateY(0);
  }
  
  .nn-nav__menu--open li:nth-child(1) { transition-delay: 0.1s; }
  .nn-nav__menu--open li:nth-child(2) { transition-delay: 0.15s; }
  .nn-nav__menu--open li:nth-child(3) { transition-delay: 0.2s; }
  .nn-nav__menu--open li:nth-child(4) { transition-delay: 0.25s; }
  .nn-nav__menu--open li:nth-child(5) { transition-delay: 0.3s; }
  .nn-nav__menu--open li:nth-child(6) { transition-delay: 0.35s; }
  .nn-nav__menu--open li:nth-child(7) { transition-delay: 0.4s; }
  .nn-nav__menu--open li:nth-child(8) { transition-delay: 0.45s; }
  .nn-nav__menu--open li:nth-child(9) { transition-delay: 0.5s; }
  
  .nn-nav__link {
    font-size: 1.5rem;
    color: var(--nav-link-color);
    padding: 1rem 2rem;
    text-align: center;
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.3s ease;
    min-width: 200px;
    position: relative;
  }
  
  .nn-nav__link:hover {
    background: rgba(147, 51, 234, 0.1);
    transform: translateX(10px);
  }
  
  .nn-nav__link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 0;
    background: var(--nav-link-hover);
    border-radius: 2px;
    transition: height 0.3s ease;
  }
  
  .nn-nav__link:hover::before,
  .nn-nav__link--active::before {
    height: 100%;
  }
  
  .nn-nav__cta {
    margin-top: 1rem;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    min-width: 200px;
    text-align: center;
    border-radius: 50px;
  }
  
  .nn-nav__cta:hover {
    transform: translateY(-2px) scale(1.05);
  }
  
  /* Reduce header height on mobile */
  .nn-nav {
    height: 64px;
    padding: 0 1rem;
  }
  
  .nn-header--scrolled .nn-nav {
    height: 56px;
  }
}

@media (max-width: 480px) {
  .nn-nav {
    padding: 0 0.75rem;
  }
  
  .nn-nav__logo {
    font-size: 1.25rem;
  }
  
  .nn-nav__logo-img {
    width: 28px;
    height: 28px;
  }
  
  .nn-nav__link {
    font-size: 1.3rem;
    padding: 0.8rem 1.5rem;
    min-width: 180px;
  }
  
  .nn-nav__cta {
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
    min-width: 180px;
  }
}

/* Accessibility Enhancements */
@media (prefers-reduced-motion: reduce) {
  .nn-header,
  .nn-nav,
  .nn-nav__logo,
  .nn-nav__link,
  .nn-nav__cta,
  .nn-nav__toggle span,
  .nn-nav__menu {
    transition: none;
  }
}

/* Focus States */
.nn-nav__link:focus-visible,
.nn-nav__cta:focus-visible,
.nn-nav__toggle:focus-visible {
  outline: 2px solid var(--nav-link-hover);
  outline-offset: 2px;
  border-radius: 4px;
}

/* High Contrast Support */
@media (prefers-contrast: high) {
  .nn-header {
    --header-bg: #000000;
    --nav-link-color: #ffffff;
    --nav-link-hover: #ffff00;
    border-bottom: 2px solid #ffffff;
  }
}

/* Skip Link */
.nn-skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--nav-link-hover);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: 4px;
  font-weight: 600;
  z-index: 10000;
  transition: top 0.3s;
}

.nn-skip-link:focus {
  top: 6px;
}

/* Print Styles */
@media print {
  .nn-header {
    display: none;
  }
}