/* ==========================================================================
   SSE SOLAR SOLUTIONS — HEADER & NAVIGATION STYLES
   ========================================================================== */

/* Top Utility Bar */
.top-bar {
  background-color: var(--color-dark);
  color: var(--color-text-light);
  font-size: 0.825rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

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

.top-bar-item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: #CBD5E1;
  transition: color var(--transition-fast);
}

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

.top-bar-item svg {
  width: 15px;
  height: 15px;
  color: var(--color-solar-yellow);
}

.top-bar-tag {
  background-color: rgba(22, 163, 74, 0.2);
  color: #4ADE80;
  font-weight: 600;
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
}

/* Main Header Navbar */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: all var(--transition-base);
}

.site-header.is-scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 84px;
  transition: height var(--transition-base);
}

.site-header.is-scrolled .navbar {
  height: 70px;
}

/* Brand Logo */
.brand-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  height: 60px;
}

.brand-logo img {
  height: 52px;
  width: auto;
  transition: height var(--transition-base);
}

.site-header.is-scrolled .brand-logo img {
  height: 44px;
}

/* Desktop Navigation Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  font-family: var(--font-heading);
  font-size: 0.975rem;
  font-weight: 600;
  color: var(--color-dark);
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color var(--transition-fast);
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2.5px;
  background-color: var(--color-primary-green);
  border-radius: var(--radius-full);
  transition: width var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Services Dropdown */
.nav-item-dropdown {
  position: relative;
}

.dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.dropdown-toggle svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.nav-item-dropdown:hover .dropdown-toggle svg {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 280px;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
  padding: 0.75rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  z-index: 1010;
}

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

.dropdown-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-dark);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.dropdown-link:hover {
  background-color: var(--color-light-background);
  color: var(--color-primary-green);
  transform: translateX(3px);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Mobile Menu Toggle Button */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background-color: var(--color-light-background);
  padding: 8px;
  gap: 5px;
  z-index: 1020;
}

.mobile-menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-dark);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.mobile-menu-toggle.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-menu-toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Navigation Drawer */
.mobile-nav-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 85%;
  max-width: 380px;
  height: 100vh;
  background-color: var(--color-white);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.15);
  padding: 5rem 1.75rem 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: right var(--transition-slow);
  z-index: 1015;
  overflow-y: auto;
}

.mobile-nav-drawer.is-open {
  right: 0;
}

.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 1012;
}

.mobile-nav-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mobile-nav-link {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-dark);
  padding: 0.75rem 0.5rem;
  border-bottom: 1px solid var(--color-border-light);
}

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

.mobile-submenu {
  padding-left: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-top: 0.25rem;
  margin-bottom: 0.5rem;
}

.mobile-submenu-link {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  padding: 0.4rem 0;
  display: block;
}

.mobile-submenu-link:hover {
  color: var(--color-primary-green);
}

.mobile-nav-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.5rem;
}