.navbar {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-sticky);
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-normal), box-shadow var(--transition-normal);
}

@supports (backdrop-filter: blur(16px)) {
  .navbar {
    backdrop-filter: blur(24px) saturate(1.15);
    -webkit-backdrop-filter: blur(24px) saturate(1.15);
  }
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
  background: var(--bg-glass-hover);
  border-bottom-color: var(--border-strong);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--text-primary);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
  min-height: 44px;
  transition: opacity var(--transition-fast);
}

.nav-logo:hover {
  opacity: 0.85;
}

html[lang="ar"] .nav-logo {
  font-family: var(--font-ar);
  font-size: 1.45rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: var(--space-1);
}

.nav-item a {
  padding: 10px 16px;
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  min-height: 44px;
  display: flex;
  align-items: center;
}

.nav-item > a {
  transition: all var(--transition-fast);
}

.nav-item > a:hover,
.nav-item.active > a {
  color: var(--color-primary);
  background: var(--color-primary-muted);
}

.nav-item-dropdown {
  position: relative;
}

.nav-item-dropdown > a {
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-item-dropdown > a::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  margin-top: 2px;
  transition: transform var(--transition-fast);
  opacity: 0.7;
}

.nav-item-dropdown:hover > a::after {
  transform: rotate(180deg);
}

.nav-dropdown {
  display: block;
  visibility: hidden;
  opacity: 0;
  transform: translateY(8px);
  position: absolute;
  top: calc(100% + 6px);
  inset-inline-start: 0;
  min-width: 220px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  padding: var(--space-2);
  list-style: none;
  z-index: var(--z-dropdown);
  transition: all var(--transition-bounce);
}

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

.nav-dropdown li a {
  display: flex;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.nav-dropdown li a:hover,
.nav-dropdown li a.active {
  color: var(--color-primary);
  background: var(--color-primary-muted);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-toggle-btn {
  background: var(--bg-inset);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.nav-toggle-btn:hover {
  background: var(--color-primary-muted);
  border-color: var(--border-strong);
  color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-xs);
}

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--space-2);
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.mobile-menu-toggle:hover {
  background: var(--color-primary-muted);
}

@media (max-width: 992px) {
  .mobile-menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: var(--space-6);
    gap: var(--space-2);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-item {
    width: 100%;
    text-align: center;
  }

  .nav-item a {
    display: flex;
    padding: 14px 12px;
    width: 100%;
    font-size: var(--text-base);
    justify-content: center;
  }

  .nav-item-dropdown {
    position: static;
  }

  .nav-item-dropdown > a::after {
    display: none;
  }

  .nav-dropdown {
    position: static;
    display: block;
    box-shadow: none;
    border: none;
    padding: 0;
    background: transparent;
    visibility: visible;
    opacity: 1;
    transform: none;
  }

  .nav-dropdown li a {
    padding: 10px 12px;
    font-size: var(--text-sm);
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .nav-container { height: 60px; }
  .nav-menu { top: 60px; padding: var(--space-5) var(--space-4); }
  .nav-logo { font-size: 1.05rem; }
  html[lang="ar"] .nav-logo { font-size: 1.15rem; }
  .nav-actions { gap: 6px; }
}

/* Notifications */
.notif-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.notif-bell {
  position: relative;
}

.notif-badge {
  position: absolute;
  top: -2px;
  inset-inline-end: -2px;
  min-width: 17px;
  height: 17px;
  padding: 0 5px;
  border-radius: var(--radius-full);
  background: var(--color-danger);
  color: #fff;
  font-size: 0.6rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  pointer-events: none;
  z-index: 2;
  box-shadow: 0 2px 6px rgba(220, 38, 38, 0.35);
}

.notif-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  inset-inline-end: 0;
  width: 360px;
  max-height: 440px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  z-index: 1100;
  overflow: hidden;
  flex-direction: column;
}

.notif-dropdown.open {
  display: flex;
}

.notif-dropdown-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-tertiary);
}

.notif-title {
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--text-primary);
}

.notif-mark-all {
  background: none;
  border: none;
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  transition: background var(--transition-fast);
}

.notif-mark-all:hover {
  background: var(--color-primary-muted);
}

.notif-list {
  overflow-y: auto;
  max-height: 360px;
  flex: 1;
}

.notif-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  cursor: pointer;
  transition: background var(--transition-fast);
  border-bottom: 1px solid var(--border-color);
}

.notif-item:last-child {
  border-bottom: none;
}

.notif-item:hover {
  background: var(--color-primary-muted);
}

.notif-item.notif-unread {
  background: var(--color-primary-muted);
  border-inline-start: 3px solid var(--color-primary);
}

.notif-item-content {
  flex: 1;
  min-width: 0;
}

.notif-item-text {
  font-size: var(--text-sm);
  color: var(--text-primary);
  line-height: 1.45;
  word-wrap: break-word;
}

.notif-item-time {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: 2px;
}

.notif-mark-read,
.notif-dismiss {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-full);
  color: var(--text-muted);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  margin-top: 2px;
  transition: all var(--transition-fast);
}

.notif-mark-read:hover {
  color: var(--color-success);
  background: var(--color-success-light);
}

.notif-dismiss:hover {
  color: var(--color-danger);
  background: var(--color-danger-light);
}

.notif-empty {
  padding: var(--space-8) var(--space-4);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--text-muted);
}

@media (max-width: 480px) {
  .notif-dropdown {
    width: calc(100vw - 32px);
    inset-inline-end: -60px;
    max-height: 360px;
  }
}