/* ============================================
   NAVIGATION.CSS - Glass Navigation Bar
   Fixed header with glass morphism effect
   ============================================ */

.glass-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(255, 255, 255, 0.8);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition-base);
}

.dark .glass-nav {
  background: rgba(0, 0, 0, 0.8);
  border-bottom-color: var(--digital-border-light);
}

/* Scrolled state */
.glass-nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.dark .glass-nav.scrolled {
  background: rgba(0, 0, 0, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

/* Nav Container */
.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.nav-logo {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--accent-primary);
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.nav-logo:hover {
  transform: scale(1.05);
}

/* Desktop Navigation */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav-link {
  position: relative;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link:hover {
  color: var(--accent-primary);
}

.nav-link.active {
  color: var(--accent-primary);
}

/* Nav Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

/* Theme Toggle Button */
.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: transparent;
  border: 2px solid var(--border-medium);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
}

.theme-toggle:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: rotate(15deg) scale(1.1);
}

.theme-toggle i {
  font-size: 1.125rem;
  transition: transform var(--transition-base);
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.mobile-menu-btn span {
  width: 25px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
  border-radius: 2px;
}

.mobile-menu-btn:hover span {
  background: var(--accent-primary);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 400px;
  height: 100vh;
  background: var(--bg-primary);
  z-index: 2000;
  padding: 2rem;
  transition: right var(--transition-base);
  overflow-y: auto;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
}

.dark .mobile-menu {
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.4);
}

.mobile-menu.active {
  right: 0;
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

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

/* Mobile Menu Close */
.mobile-menu-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mobile-menu-close:hover {
  background: var(--accent-primary);
  color: white;
  transform: rotate(90deg);
}

/* Mobile Menu Links */
.mobile-nav-links {
  list-style: none;
  margin-top: 4rem;
}

.mobile-nav-links .nav-link {
  display: block;
  padding: 1rem 0;
  font-size: 1.25rem;
  border-bottom: 1px solid var(--border-light);
}

.mobile-nav-links .nav-link::after {
  display: none;
}

.mobile-nav-links .nav-link:hover {
  padding-left: 1rem;
}

/* Mobile Theme Toggle */
.mobile-theme-toggle {
  margin-top: 2rem;
  width: 100%;
  padding: 1rem;
  border-radius: 12px;
  background: var(--bg-secondary);
  border: 2px solid var(--border-medium);
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: all var(--transition-base);
}

.mobile-theme-toggle:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links,
  .nav-actions .theme-toggle {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .nav-container {
    padding: 1rem 1.5rem;
  }
}

@media (min-width: 769px) {
  .mobile-menu,
  .mobile-menu-overlay {
    display: none !important;
  }
}