.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar::before {
  content: '';
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--brand-accent), transparent);
  opacity: 0;
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-xl);
  border-bottom-color: var(--brand-accent);
}

.navbar.scrolled::before {
  opacity: 1;
}

.navbar.nav-hidden {
  transform: translateY(-100%);
}

.nav-container {
  max-width: 1600px;
  margin: 0 auto;
}

.auth-link {
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.auth-link:hover {
  background: var(--brand-pale);
  border-color: var(--brand-accent);
  box-shadow: var(--shadow-lg);
}

.register-btn {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-light) 100%);
  color: #fff !important;
  box-shadow: var(--shadow-brand);
  border: 1px solid var(--brand-accent);
}

.register-btn:hover {
  background: linear-gradient(135deg, var(--brand-light) 0%, var(--brand) 100%);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

.nav-dropdown {
  position: relative;
}

.dropdown-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  cursor: pointer;
  user-select: none;
}

.dropdown-toggle:hover {
  background: var(--brand-pale);
  border-color: var(--brand-accent);
}

.dropdown-toggle.active {
  background: var(--brand-pale);
  border-color: var(--brand);
  box-shadow: var(--shadow-lg);
}

.user-avatar-mini {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--brand), var(--brand-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 0.85rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.dropdown-toggle:hover .user-avatar-mini {
  transform: scale(1.1);
  box-shadow: var(--shadow-brand);
}

.dropdown-arrow {
  transition: var(--transition);
  font-size: 0.9rem;
}

.dropdown-toggle.active .dropdown-arrow {
  transform: rotate(180deg);
  color: var(--brand);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 1rem);
  right: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--brand-accent);
  border-radius: var(--radius-2xl);
  min-width: 320px;
  backdrop-filter: var(--blur);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-20px) scale(0.95);
  transition: var(--transition);
  z-index: 1001;
  overflow: hidden;
}

.dropdown-menu::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--brand), var(--brand-light));
}

.dropdown-menu::after {
  content: '';
  position: absolute;
  top: -8px;
  right: 2rem;
  width: 16px;
  height: 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--brand-accent);
  border-bottom: none;
  border-right: none;
  transform: rotate(45deg);
  border-radius: 2px 0 0 0;
}

.dropdown-menu.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.dropdown-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem;
  background: var(--brand-pale);
  border-bottom: 1px solid var(--brand-accent);
  position: relative;
}

.user-avatar-large {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--brand), var(--brand-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 900;
  font-size: 1.5rem;
  box-shadow: var(--shadow-brand);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  border: 3px solid rgba(255, 255, 255, 0.2);
}

.user-info {
  flex: 1;
  position: relative;
  z-index: 1;
}

.user-name {
  font-weight: 800;
  color: var(--text-primary);
  margin: 0 0 0.5rem 0;
  font-size: 1.2rem;
  line-height: 1.2;
}

.user-email {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0 0 0.75rem 0;
  word-break: break-word;
}

.user-role {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--brand);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: rgba(255, 255, 255, 0.1);
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  border: 1px solid var(--brand-accent);
  backdrop-filter: var(--blur-sm);
}

.dropdown-items {
  padding: 1rem 0;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1rem 2rem;
  text-decoration: none;
  color: var(--text-secondary);
  transition: var(--transition);
  font-weight: 500;
  position: relative;
  overflow: hidden;
}

.dropdown-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--brand-pale);
  opacity: 0;
  transition: var(--transition);
  transform: translateX(-100%);
}

.dropdown-item:hover {
  color: var(--brand);
  transform: translateX(8px);
}

.dropdown-item:hover::before {
  opacity: 1;
  transform: translateX(0);
}

.dropdown-item i {
  font-size: 1.2rem;
  width: 24px;
  text-align: center;
  position: relative;
  z-index: 1;
  transition: var(--transition);
}

.dropdown-item span {
  position: relative;
  z-index: 1;
  font-size: 1rem;
  flex: 1;
}

.dropdown-item:hover i {
  transform: scale(1.1);
}

.admin-item {
  background: rgba(236, 116, 0, 0.05);
  border: 1px solid var(--brand-accent);
  margin: 0 1rem;
  border-radius: var(--radius-lg);
}

.logout-item {
  color: #ef4444 !important;
  font-weight: 600;
}

.logout-item i {
  color: #ef4444;
}

.logout-item:hover {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444 !important;
  transform: none;
}

.notification-badge {
  background: #ef4444;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.25rem 0.5rem;
  border-radius: 50px;
  min-width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.4);
}

.dropdown-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 0.75rem 1rem;
}

.hamburger {
  flex-direction: column;
  justify-content: center;
  cursor: pointer;
  padding: 0.75rem;
  gap: 6px;
  border-radius: var(--radius-lg);
  transition: var(--transition);
  background: transparent;
  border: none;
}

.hamburger:hover {
  background: var(--brand-pale);
  transform: scale(1.05);
}

.hamburger-line {
  width: 24px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
  transform-origin: center;
}

.hamburger.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
  background: var(--brand);
}

.hamburger.active .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
  background: var(--brand);
}

.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  background: transparent;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  z-index: 9999;
  pointer-events: none;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--brand), var(--brand-light));
  width: 0%;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 0 2px 2px 0;
  box-shadow: 0 0 15px var(--brand);
  position: relative;
}

.progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 30px;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3));
  animation: shimmer 2s infinite;
}

.navbar .logo-icon::before {
  content: none;
  background: none;
}

.navbar .logo-icon {
  position: relative;
  overflow: hidden;
}

.navbar .logo-icon img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

@keyframes shimmer {
  0% {
    transform: translateX(-30px);
  }
  100% {
    transform: translateX(30px);
  }
}

.nav-link:focus-visible,
.dropdown-toggle:focus-visible,
.dropdown-item:focus-visible,
.hamburger:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 2px;
}

@media (max-width: 1200px) {
  .nav-container {
    padding: 1rem 1.5rem;
  }
}

@media (max-width: 1024px) {
  .dropdown-menu {
    right: -1rem;
  }
}

@media (max-width: 768px) {
  .dropdown-menu {
    position: static;
    margin-top: 1rem;
    transform: none;
    opacity: 1;
    visibility: visible;
    background: var(--bg-card);
    border: 1px solid var(--border);
    min-width: auto;
    width: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .dropdown-menu.active {
    max-height: 500px;
  }

  .dropdown-menu::after {
    display: none;
  }

  .dropdown-header {
    padding: 1.5rem;
  }

  .user-avatar-large {
    width: 50px;
    height: 50px;
    font-size: 1.25rem;
  }

  .dropdown-items {
    padding: 0.5rem 0;
  }

  .dropdown-item {
    padding: 1rem 1.5rem;
  }

  .nav-container {
    padding: 1rem;
  }

  .nav-menu {
    max-height: calc(100vh - 80px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
}

@media (max-width: 480px) {
  .nav-logo {
    font-size: 1.4rem;
  }

  .dropdown-header {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
    padding: 1.25rem;
  }

  .user-info {
    text-align: center;
  }

  .dropdown-item {
    padding: 0.875rem 1.25rem;
  }

  .hamburger-line {
    width: 20px;
    height: 2px;
  }
}

@media (prefers-contrast: high) {
  .dropdown-menu {
    border: 2px solid var(--brand);
  }
}

@media print {
  .navbar,
  .hamburger,
  .mobile-menu-overlay,
  .scroll-progress {
    display: none !important;
  }
}