/**
 * BigCat Codeworks Navigation Component
 * Navigation bar, mobile menu, and navigation utilities
 * 
 * Import order: tokens.css → base.css → layout.css → components/nav.css
 */

/* ===== CSS VARIABLES ===== */
:root {
  --logo-height: clamp(2rem, 5vw, 3rem);
  --nav-padding: 1rem;
  --nav-height: calc(var(--logo-height) + var(--nav-padding) * 2);
}

/* ===== NAVIGATION CONTAINER ===== */

.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 0, 255, 0.2);
  transition: all var(--duration-normal) var(--ease-cyber-out);
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--nav-padding);
  height: var(--nav-height);
}

.top-nav--scrolled {
  background: rgba(0, 0, 0, 0.98);
  border-bottom-color: rgba(255, 0, 255, 0.4);
  box-shadow: 0 4px 20px rgba(255, 0, 255, 0.1);
}

/* ===== LOGO ===== */

.nav__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--color-text-primary);
  font-family: var(--font-hero);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color var(--duration-fast) var(--ease-cyber-out);
  flex-shrink: 0;
  z-index: 3;
}

.nav__logo:hover {
  color: var(--color-primary);
}

.nav__logo:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.nav__logo img {
  height: var(--logo-height);
  width: auto;
  filter: drop-shadow(0 0 8px var(--color-primary));
  border-radius: var(--radius-base);
}

/* ===== MOBILE NAVIGATION TOGGLE ===== */

.nav__toggle {
  background: none;
  border: 1px solid var(--color-bg-tertiary);
  border-radius: var(--radius-base);
  color: var(--color-text-primary);
  font-size: var(--font-size-lg);
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  transition: all var(--duration-fast) var(--ease-cyber-out);
  z-index: 2;
}

.nav__toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: 0 0 10px rgba(255, 0, 255, 0.3);
}

.nav__toggle:focus {
  outline: none;
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 0, 255, 0.2);
}

.nav__toggle-icon {
  transition: transform var(--duration-fast) var(--ease-cyber-out);
}

/* ===== NAVIGATION MENU ===== */

.nav__menu {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
}

.nav__list {
  display: flex;
  justify-content: center;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--spacing-8);
}

.nav__item {
  position: relative;
  flex-shrink: 0;
  white-space: nowrap;
}

.nav__link {
  display: block;
  padding: var(--spacing-2) var(--spacing-3);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-family: var(--font-heading);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all var(--duration-fast) var(--ease-cyber-out);
  position: relative;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.2;
}

.nav__link:hover {
  color: var(--color-text-primary);
}

.nav__link:focus {
  outline: none;
  color: var(--color-primary);
}

/* Neon Underline Effect */
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  box-shadow: 0 0 10px var(--color-primary);
  transition: all var(--duration-normal) var(--ease-cyber-out);
  transform: translateX(-50%);
}

.nav__link:hover::after,
.nav__link:focus::after {
  width: 100%;
}

/* Active State */
.nav__link--active {
  color: var(--color-primary);
}

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

/* ===== RESPONSIVE DESIGN ===== */

/* Responsive Logo and Nav Height */
@media (max-width: 1024px) {
  :root {
    --logo-height: 2.5rem;
  }
}

@media (max-width: 768px) {
  :root {
    --logo-height: 2rem;
  }
  
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: absolute;
    top: 100%; /* dropdown appears below nav bar */
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.98);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 0, 255, 0.2);
    border-bottom: 1px solid rgba(255, 0, 255, 0.2);
    display: none;
    flex-direction: column;
    box-shadow: 0 4px 20px rgba(255, 0, 255, 0.1);
    z-index: var(--z-fixed);
  }

  .nav__menu.open {
    display: flex;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
    width: 100%;
  }

  .nav__item {
    border-bottom: 1px solid rgba(255, 0, 255, 0.1);
  }

  .nav__item:last-child {
    border-bottom: none;
  }

  .nav__link {
    display: block;
    padding: var(--spacing-6) var(--spacing-8);
    text-align: left;
    border-radius: 0;
    transition: all var(--duration-fast) var(--ease-cyber-out);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    border-bottom: 1px solid rgba(255, 0, 255, 0.1);
  }

  .nav__link:hover {
    background: rgba(255, 0, 255, 0.1);
    color: var(--color-primary);
  }

  .nav__link::after {
    display: none;
  }

  /* Mobile Menu Animation */
  .nav__menu.open .nav__item {
    animation: slideInDown 0.3s ease-out forwards;
  }

  .nav__menu.open .nav__item:nth-child(1) { animation-delay: 0.1s; }
  .nav__menu.open .nav__item:nth-child(2) { animation-delay: 0.2s; }
  .nav__menu.open .nav__item:nth-child(3) { animation-delay: 0.3s; }
  .nav__menu.open .nav__item:nth-child(4) { animation-delay: 0.4s; }
  .nav__menu.open .nav__item:nth-child(5) { animation-delay: 0.5s; }
}

/* ===== DESKTOP NAVIGATION ===== */

@media (min-width: 1024px) {
  .nav__list {
    display: flex;
  }
  
  /* Dropdown Support */
  .nav__item--has-dropdown {
    position: relative;
  }
  
  .nav__dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 0, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-cyber-out);
    z-index: var(--z-dropdown);
  }
  
  .nav__item--has-dropdown:hover .nav__dropdown,
  .nav__item--has-dropdown:focus-within .nav__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
  }
  
  .nav__dropdown-link {
    display: block;
    padding: var(--spacing-2) var(--spacing-3);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    border-radius: var(--radius-base);
    transition: all var(--duration-fast) var(--ease-cyber-out);
  }
  
  .nav__dropdown-link:hover {
    background: rgba(255, 0, 255, 0.1);
    color: var(--color-primary);
  }
}

/* ===== NAVIGATION ANIMATIONS ===== */

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== SCROLL INDICATOR ===== */

.nav__scroll-indicator {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  box-shadow: 0 0 10px var(--color-primary);
  transition: width var(--duration-slow) var(--ease-cyber-out);
}

/* ===== NAVIGATION UTILITIES ===== */

/* Hide on specific pages */
.top-nav--hidden {
  transform: translateY(-100%);
}

/* Transparent navigation for hero sections */
.top-nav--transparent {
  background: transparent;
  border-bottom: none;
}

.top-nav--transparent .nav__link {
  color: var(--color-text-primary);
}

.top-nav--transparent .nav__logo {
  color: var(--color-text-primary);
}

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

/* High contrast mode */
@media (prefers-contrast: high) {
  .top-nav {
    background: var(--color-bg-primary);
    border-bottom: 2px solid var(--color-primary);
  }
  
  .nav__link {
    border: 1px solid transparent;
  }
  
  .nav__link:hover,
  .nav__link:focus {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: var(--color-text-inverse);
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .nav__menu,
  .nav__link::after,
  .nav__dropdown {
    transition: none;
  }
  
  .nav__menu.open .nav__item {
    animation: none;
  }
}

/* ===== PRINT STYLES ===== */

@media print {
  .top-nav {
    position: static;
    background: transparent;
    border-bottom: 1px solid var(--color-text-primary);
  }
  
  .nav__toggle,
  .nav__dropdown {
    display: none;
  }
  
  .nav__list {
    display: flex;
    flex-direction: row;
    gap: var(--spacing-4);
  }
  
  .nav__link {
    color: var(--color-text-primary);
    text-decoration: underline;
  }
}