/* ==========================================================================
   ENTERPRISE HEADER, NAVBAR, MEGA-MENU & NAVIGATION DRAWER (LIGHT THEME)
   ========================================================================== */

.top-bar {
  background-color: var(--color-slate-900);
  color: var(--color-slate-300);
  font-size: 0.8rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
  z-index: 1001;
}

.top-bar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.top-bar-info {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.top-bar-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-slate-300);
  font-size: 0.8rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  text-decoration: none;
}

.top-bar-item:hover {
  color: var(--color-gold);
}

.top-bar-social {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.social-icon-link {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--color-slate-300);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.social-icon-link:hover {
  background: var(--color-gold);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* Site Header Navbar */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--color-slate-200);
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.05);
  transition: all var(--transition-base);
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 1rem;
}

/* Brand Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo img {
  height: 48px;
  width: auto;
  object-fit: contain;
}

/* Navigation Links */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.6rem 1rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-slate-800);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-light-bg);
}

.nav-link.active {
  color: var(--color-primary);
  background-color: rgba(11, 79, 108, 0.08);
  font-weight: 700;
}

/* Dropdown Menu (Standard Single-Column) */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: #FFFFFF;
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.12);
  padding: 0.6rem 0;
  min-width: 320px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
  z-index: 1100;
}

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

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-slate-700);
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.dropdown-item i {
  font-size: 0.95rem;
  width: 18px;
  text-align: center;
  flex-shrink: 0;
}

.dropdown-item:hover {
  background: rgba(11, 79, 108, 0.06);
  color: var(--color-primary);
  padding-left: 1.5rem;
}

/* Header Actions (CTA + Mobile Toggle) */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-shrink: 0;
}

/* Mobile Toggle Hamburger Button */
.mobile-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--color-light-bg);
  border: 1px solid var(--color-slate-200);
  color: var(--color-slate-900);
  font-size: 1.25rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mobile-toggle:hover,
.mobile-toggle:active {
  background: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
}

/* Responsive Header Breakpoints */
@media (max-width: 992px) {
  .top-bar {
    display: none !important;
  }

  .nav-menu {
    display: none !important;
  }

  .header-actions .btn.open-quote-modal {
    display: none !important;
  }

  .mobile-toggle {
    display: flex;
    width: 44px;
    height: 44px;
    font-size: 1.3rem;
  }

  .navbar {
    height: 68px;
  }

  .brand-logo img {
    height: 42px;
    max-width: 160px;
  }
}

@media (max-width: 768px) {
  .top-bar {
    display: none !important;
  }

  .navbar {
    height: 64px;
  }

  .brand-logo img {
    height: 38px;
    max-width: 145px;
  }

  .mobile-toggle {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }
}

@media (max-width: 420px) {
  .brand-logo img {
    height: 36px;
    max-width: 130px;
  }

  .mobile-toggle {
    width: 38px;
    height: 38px;
    font-size: 1.15rem;
  }
}

/* Mobile Drawer Overlay & Sliding Menu (Hidden by default) */
.mobile-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

.mobile-drawer {
  position: absolute;
  top: 0;
  right: 0;
  width: 320px;
  max-width: 85vw;
  height: 100%;
  background: #FFFFFF;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.2);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
}

.mobile-drawer-overlay.active .mobile-drawer {
  transform: translateX(0);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-slate-200);
}

.drawer-close {
  font-size: 1.5rem;
  color: var(--color-slate-700);
  cursor: pointer;
  padding: 0.25rem;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.mobile-nav-link {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-slate-800);
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--color-primary);
}

.mobile-submenu-trigger {
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  font-size: inherit;
  font-weight: inherit;
  padding: 0.5rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  -webkit-tap-highlight-color: transparent;
}

.mobile-submenu {
  display: none;
  flex-direction: column;
  gap: 0.75rem;
  padding-left: 1rem;
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
  border-left: 2px solid var(--color-primary);
}

.mobile-submenu.active,
.mobile-submenu.open {
  display: flex !important;
}

.mobile-submenu a {
  font-size: 0.95rem;
  color: var(--color-slate-700);
  text-decoration: none;
  padding: 0.35rem 0;
  display: block;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.mobile-submenu a:hover,
.mobile-submenu a.active {
  color: var(--color-primary);
  font-weight: 600;
  transform: translateX(4px);
}