/* Header & Navigation Premium Styles */

/* Sticky glassmorphism header */
.main-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 1000;
  backdrop-filter: blur(12px);
  background: rgba(255,255,255,0.85);
  border-bottom: 1px solid var(--border-medium);
  transition: background var(--transition-normal), border-color var(--transition-normal);
}
[data-theme="dark"] .main-header {
  background: rgba(0,0,0,0.85);
}

/* Navigation container */
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  padding: 0.5rem 0;
}

/* Brand logo spacing */
.brand-logo-img {
  height: 94px;
  max-height: 98px;
  width: auto;
  object-fit: contain;
  display: block;
}

/* Brand logo container */
.brand-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  margin-right: 1.5rem;
  text-decoration: none;
}

/* Nav menu layout */
.nav-menu {
  display: none;
}

@media (min-width: 992px) {
  .nav-menu {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    list-style: none;
    margin: 0;
    padding: 0;
  }
}
.nav-link {
  position: relative;
  color: var(--text-primary);
  font-weight: 600;
  transition: color var(--transition-fast);
}
.nav-link:hover {
  color: var(--sun-gold);
}
/* Underline hover effect */
.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background: var(--sun-gold);
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}
.nav-link:hover::after {
  transform: scaleX(1);
}
/* Active page highlight */
.nav-link.active {
  color: var(--sun-gold);
}
.nav-link.active::after {
  transform: scaleX(1);
}

/* Dropdown (mega menu) */
.dropdown {
  position: relative;
}
.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 280px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1rem;
  box-shadow: var(--shadow-md);
  z-index: 1000;
}
.dropdown:hover .dropdown-content {
  display: block;
}
.dropdown-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.dropdown-list li {
  margin: 0.5rem 0;
}
.dropdown-list a {
  color: var(--text-primary);
  font-weight: 500;
  transition: color var(--transition-fast);
}
.dropdown-list a:hover {
  color: var(--sun-gold);
}

/* Header actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.nav-actions .btn-primary {
  white-space: nowrap;
}
.nav-icon {
  color: var(--text-primary);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  cursor: pointer;
}
.nav-icon:hover {
  color: var(--sun-gold);
}

/* Mobile menu button - hidden on desktop */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  cursor: pointer;
  color: var(--text-primary);
  padding: 0.25rem;
  line-height: 1;
  transition: color var(--transition-fast);
}
.mobile-menu-btn:hover {
  color: var(--sun-gold);
}

/* Scrolled header: deeper shadow */
.main-header.scrolled {
  box-shadow: var(--shadow-lg);
  border-bottom-color: var(--border-medium);
}

/* Mobile Header & Drawer */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: var(--bg-card);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-xl);
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
    z-index: 999;
  }

  .nav-menu.open {
    transform: translateY(0);
  }

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

  .dropdown .dropdown-content {
    position: static;
    box-shadow: none;
    border: none;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 0.5rem 1rem;
    margin-top: 0.25rem;
    display: none;
  }
  .dropdown:hover .dropdown-content,
  .dropdown.open .dropdown-content {
    display: block;
  }
  .nav-actions .btn-primary {
    display: none;
  }
  .nav-actions .theme-toggle-btn,
  .nav-actions .nav-icon {
    display: flex;
  }

  .brand-logo-img {
    height: 48px;
    max-height: 50px;
  }
  .brand-logo {
    margin: 0;
  }
}