/* ================================================
   Modern Navigation - Professional Design
   ================================================ */

.main-nav {
  background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
  border-bottom: 1px solid #e2e8f0;
  position: relative;
  z-index: var(--z-navbar, 900);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
}

/* Nav Menu */
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 5px;
  width: 100%;
}

/* Nav Items */
.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 15px 18px;
  color: #475569;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  border-radius: 8px;
  margin: 5px 0;
}

.nav-link:hover {
  background: rgba(0, 102, 204, 0.08);
  color: #0066cc;
}

.nav-link i {
  font-size: 0.9rem;
  width: 18px;
  text-align: center;
}

/* Campus Indicator */
.campus-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Dropdown Arrow */
.dropdown-arrow {
  font-size: 0.7rem;
  margin-left: 4px;
  transition: transform 0.3s ease;
}

.nav-dropdown.open .dropdown-arrow,
.nav-dropdown:hover .dropdown-arrow {
  transform: rotate(180deg);
}

/* Dropdown Menu */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  border-radius: 12px;
  box-shadow:
    0 10px 40px rgba(0, 0, 0, 0.12),
    0 2px 10px rgba(0, 0, 0, 0.08);
  min-width: 260px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s ease;
  z-index: var(--z-popover, 1300);
  padding: 8px 0;
  border: 1px solid #e2e8f0;
  margin-top: 5px;
}

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

.dropdown-header {
  padding: 12px 18px;
  color: #64748b;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid #e2e8f0;
  margin-bottom: 5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.dropdown-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  color: #475569;
  text-decoration: none;
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.dropdown-link:hover {
  background: linear-gradient(
    90deg,
    rgba(0, 102, 204, 0.1) 0%,
    transparent 100%
  );
  color: #0066cc;
  padding-left: 24px;
}

.dropdown-link i {
  font-size: 0.5rem;
  color: #cbd5e1;
}

.dropdown-link:hover i {
  color: #0066cc;
}

.dropdown-empty {
  padding: 20px 18px;
  color: #94a3b8;
  font-size: 0.9rem;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

/* Mobile Toggle */
.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: 12px;
  background: transparent;
  border: none;
  cursor: pointer;
  margin-left: auto;
  width: 48px;
  height: 48px;
}

.toggle-bar {
  display: block;
  width: 24px;
  height: 3px;
  background: #475569;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.nav-mobile-toggle.active .toggle-bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 6px);
}

.nav-mobile-toggle.active .toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-mobile-toggle.active .toggle-bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -6px);
}

/* ================================================
   Responsive Design
   ================================================ */

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

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-top: 1px solid #e2e8f0;
    max-height: 80vh;
    overflow-y: auto;
    z-index: var(--z-overlay, 1100);
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    padding: 14px 16px;
    justify-content: flex-start;
    border-radius: 8px;
    margin: 2px 0;
  }

  .nav-dropdown .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: #f8fafc;
    border-radius: 8px;
    margin: 5px 0 5px 20px;
    display: none;
    padding: 0;
  }

  .nav-dropdown.open .dropdown-menu {
    display: block;
  }

  .nav-dropdown:hover .dropdown-menu {
    display: none;
  }

  .nav-dropdown.open:hover .dropdown-menu {
    display: block;
  }

  .dropdown-header {
    padding: 10px 15px;
    background: transparent;
    border-bottom: none;
    margin-bottom: 0;
  }

  .dropdown-link {
    padding: 10px 15px;
  }

  .dropdown-link:hover {
    padding-left: 20px;
  }
}

@media (max-width: 768px) {
  .nav-container {
    padding: 0 15px;
  }

  .nav-link {
    padding: 12px 14px;
    font-size: 0.9rem;
  }

  .nav-link i {
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .nav-container {
    padding: 0 10px;
  }

  .nav-link span {
    font-size: 0.9rem;
  }

  .nav-link {
    padding: 11px 12px;
  }

  .dropdown-link {
    padding: 9px 12px;
    font-size: 0.85rem;
  }
}

/* ================================================
   Legacy Support - Old nav styles
   ================================================ */

nav:not(.main-nav) {
  display: none;
}

.mobile-menu-toggle {
  display: none !important;
}

#navMenu {
  display: none !important;
}