/* ==========================================================================
   header.css - Header Navigation + Mega Menu Styles
   ========================================================================== */

/* ------------------------------------------------------------------
   Header Wrapper
   ------------------------------------------------------------------ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-fixed);
  background-color: var(--color-white);
  transition: box-shadow var(--transition-base);
  box-shadow: var(--shadow-nav);
}

/* ------------------------------------------------------------------
   Top Bar
   ------------------------------------------------------------------ */
.header__top {
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: var(--text-xs);
  line-height: var(--leading-none);
  padding: var(--space-2) 0;
}

.header__top-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header__lang-btn {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--color-white);
  font-size: var(--text-xs);
  font-family: var(--font-primary);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-1);
  transition: all var(--transition-fast);
}

.header__lang-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

.header__lang-btn i {
  font-size: 0.7rem;
}

/* Language Switcher Dropdown */
.header__lang-switcher {
  position: relative;
}

.header__lang-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: var(--space-2);
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 120px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  z-index: 100;
}

.header__lang-switcher:hover .header__lang-dropdown,
.header__lang-btn[aria-expanded="true"] + .header__lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.header__lang-item {
  display: block;
  padding: var(--space-2) var(--space-4);
  color: var(--color-gray-900);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: background-color var(--transition-fast);
}

.header__lang-item:first-child {
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.header__lang-item:last-child {
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.header__lang-item:hover {
  background-color: var(--color-gray-100);
}

/* ------------------------------------------------------------------
   Top Bar Contact Info
   ------------------------------------------------------------------ */
.header__contact {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.header__contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-white);
  text-decoration: none;
  font-size: var(--text-xs);
  transition: opacity var(--transition-fast);
}

.header__contact-item:hover {
  opacity: 0.8;
}

.header__contact-item i {
  font-size: 0.8rem;
}

.header__top-link:hover {
  opacity: 0.8;
}

.header__top-link i {
  font-size: 0.8rem;
}

/* ------------------------------------------------------------------
   Main Bar
   ------------------------------------------------------------------ */
.header__main {
  height: 80px;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-gray-100);
}

.header__main-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ------------------------------------------------------------------
   Logo
   ------------------------------------------------------------------ */
.header__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  flex-shrink: 0;
}

.header__logo img {
  display: block;
  width: auto;
  height: 60px; /* Increased from 40px to 60px */
  object-fit: contain;
}

/* ------------------------------------------------------------------
   Desktop Navigation
   ------------------------------------------------------------------ */
.header__nav {
  display: flex;
  align-items: stretch;
  height: 100%;
}

.header__nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-2);
  align-items: stretch;
  height: 100%;
}

.header__nav-item {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.header__nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  font-size: 17px; /* Fixed size as requested */
  font-weight: 700; /* Bold font weight */
  color: var(--color-gray-700);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast);
  position: relative;
}

.header__nav-link:hover,
.header__nav-link--active {
  color: var(--color-accent);
}

/* Underline at the bottom of nav item (header bar bottom) */
.header__nav-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--transition-base);
  transform-origin: center;
}

.header__nav-item:hover::after,
.header__nav-item--active::after {
  transform: scaleX(1);
}

.header__nav-link i {
  font-size: 0.6rem;
  transition: transform var(--transition-fast);
}

/* Dropdown arrow rotation on hover */
.header__nav-item:hover > .header__nav-link i {
  transform: rotate(180deg);
}

/* ------------------------------------------------------------------
   CTA Button (Contact Us)
   ------------------------------------------------------------------ */
.header__cta {
  flex-shrink: 0;
  margin-left: var(--space-4);
}

.header__cta .btn {
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
  background-color: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
  border-radius: var(--radius);
}

.header__cta .btn:hover {
  background-color: var(--color-accent-light);
  border-color: var(--color-accent-light);
}

/* ------------------------------------------------------------------
   Hamburger Button
   ------------------------------------------------------------------ */
.header__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}

.header__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

/* Hamburger active state (X shape) */
.header__hamburger--active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__hamburger--active span:nth-child(2) {
  opacity: 0;
}

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

/* ------------------------------------------------------------------
   Dropdown Menus (Simple)
   ------------------------------------------------------------------ */
.header__dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 220px;
  background-color: var(--color-white);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: var(--shadow-lg);
  border-top: 2px solid var(--color-accent);
  padding: var(--space-2) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(8px);
  transition: opacity var(--transition-fast), visibility var(--transition-fast), transform var(--transition-fast);
  z-index: var(--z-dropdown);
}

.header__nav-item:hover > .header__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.header__dropdown-item {
  display: block;
  padding: var(--space-3) var(--space-4) var(--space-3) var(--space-5);
  font-size: var(--text-base);
  color: var(--color-gray-700);
  text-decoration: none;
  transition: all var(--transition-fast);
  line-height: var(--leading-normal);
  position: relative;
}

.header__dropdown-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-4);
  right: var(--space-4);
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--transition-base);
  transform-origin: left;
}

.header__dropdown-item:hover::after {
  transform: scaleX(1);
}

.header__dropdown-item:hover {
  background-color: var(--color-gray-50);
  color: var(--color-primary);
  padding-left: var(--space-6);
}

/* ------------------------------------------------------------------
   Mega Menu (Product)
   ------------------------------------------------------------------ */
.header__mega {
  position: fixed;
  top: 114px; /* top-bar height + main bar height */
  left: 0;
  width: 100%;
  background-color: var(--color-white);
  border-top: 2px solid var(--color-accent);
  box-shadow: var(--shadow-xl);
  padding: var(--space-8) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition-fast), visibility var(--transition-fast), transform var(--transition-fast);
  z-index: var(--z-dropdown);
}

.header__nav-item:hover > .header__mega {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.header__mega-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
}

/* Mega Menu Column */
.header__mega-col {
  min-width: 0;
}

.header__mega-heading {
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-accent);
}

/* Mega Menu Item */
.header__mega-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
}

/* Card-style mega menu (Ultimate Solutions) */
.header__mega-inner--cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-5);
  max-width: var(--container-content);
  margin: 0 auto;
}

/* Ultimate Solutions - larger images, 4 columns */
.header__mega-inner--solutions {
  grid-template-columns: repeat(4, 1fr);
}

.header__mega-inner--solutions .header__mega-thumb {
  height: 220px;
}

.header__mega-inner--solutions .header__mega-title {
  font-size: var(--text-lg);
}

.header__mega-item--card {
  flex-direction: column;
  padding: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.header__mega-item--card .header__mega-thumb {
  width: 100%;
  height: 180px;
  border-radius: 0;
}

.header__mega-item--card .header__mega-info {
  padding: var(--space-3) var(--space-4);
}

.header__mega-item--card .header__mega-title {
  font-size: var(--text-base);
  font-weight: var(--font-bold);
}

.header__mega-item--card:hover {
  background-color: var(--color-gray-50);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.header__mega-item--card::after {
  display: none;
}

.header__mega-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--transition-base);
  transform-origin: left;
}

.header__mega-item:hover::after {
  transform: scaleX(1);
}

.header__mega-item:hover {
  background-color: var(--color-gray-50);
  border-radius: var(--radius-sm);
}

.header__mega-thumb {
  width: 120px;
  height: 80px;
  flex-shrink: 0;
  background-color: var(--color-gray-200);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background-size: cover;
  background-position: center;
}

.header__mega-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.header__mega-thumb i {
  color: var(--color-white);
  font-size: 1.4rem;
}

.header__mega-info {
  flex: 1;
  min-width: 0;
}

.header__mega-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-gray-800);
  margin: 0 0 2px 0;
  line-height: var(--leading-snug);
}

.header__mega-item:hover .header__mega-title {
  color: var(--color-primary);
}

.header__mega-desc {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  margin: 0;
  line-height: var(--leading-snug);
}

/* Badges */
.badge {
  display: inline-block;
  font-size: 0.6rem;
  font-weight: var(--font-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  line-height: var(--leading-none);
  flex-shrink: 0;
}

.badge--new {
  background-color: var(--color-green);
  color: var(--color-white);
}

.badge--top {
  background-color: var(--color-info);
  color: var(--color-white);
}

.badge--hot {
  background-color: #FF5722;
  color: var(--color-white);
}

/* Mega Menu Sub-Groups (Portable Solar Panels) */
.header__mega-subgroup {
  margin-bottom: var(--space-3);
}

.header__mega-subgroup:last-child {
  margin-bottom: 0;
}

.header__mega-subgroup-title {
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  color: var(--color-gray-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
}

/* ------------------------------------------------------------------
   Mobile Navigation Overlay
   ------------------------------------------------------------------ */
.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, var(--opacity-overlay));
  z-index: var(--z-overlay);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

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

/* ------------------------------------------------------------------
   Mobile Navigation Panel
   ------------------------------------------------------------------ */
.header__mobile-nav {
  position: fixed;
  top: 0;
  right: 0;
  width: 320px;
  max-width: 85vw;
  height: 100%;
  background-color: var(--color-white);
  z-index: var(--z-modal);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.header__mobile-nav--open {
  transform: translateX(0);
}

.header__mobile-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-gray-200);
}

.header__mobile-close {
  background: none;
  border: none;
  font-size: var(--text-xl);
  color: var(--color-gray-600);
  cursor: pointer;
  padding: var(--space-1);
  line-height: 1;
  transition: color var(--transition-fast);
}

.header__mobile-close:hover {
  color: var(--color-primary);
}

.header__mobile-body {
  padding: var(--space-4) 0;
}

/* Mobile nav items */
.header__mobile-item {
  border-bottom: 1px solid var(--color-gray-100);
}

.header__mobile-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-gray-800);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.header__mobile-link:hover {
  color: var(--color-primary);
  background-color: var(--color-gray-50);
}

.header__mobile-link i {
  font-size: 0.6rem;
  transition: transform var(--transition-fast);
}

/* Mobile accordion dropdown */
.header__mobile-dropdown {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
  background-color: var(--color-gray-50);
}

.header__mobile-dropdown--open {
  max-height: 1000px;
}

.header__mobile-dropdown-item {
  display: block;
  padding: var(--space-2) var(--space-5) var(--space-2) var(--space-8);
  font-size: var(--text-sm);
  color: var(--color-gray-600);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.header__mobile-dropdown-item:hover {
  color: var(--color-primary);
  background-color: var(--color-gray-100);
}

/* Rotate chevron on open */
.header__mobile-item--open > .header__mobile-link i {
  transform: rotate(180deg);
}

/* Mobile CTA */
.header__mobile-cta {
  padding: var(--space-5);
}

.header__mobile-cta .btn {
  width: 100%;
  text-align: center;
  padding: var(--space-3) var(--space-6);
}

/* ------------------------------------------------------------------
   Responsive: Tablet & Mobile (<1024px)
   ------------------------------------------------------------------ */
@media (max-width: 1024px) {
  .header__contact {
    display: none;
  }

  .header__hamburger {
    display: flex;
  }

  .header__nav {
    display: none;
  }

  .header__cta {
    display: none;
  }

  /* Recalculate mega menu top position with header--scrolled if needed */
  .header__mega {
    top: auto;
    position: relative;
    box-shadow: none;
    border-top: none;
    padding: 0;
    transform: none;
  }
}

/* ------------------------------------------------------------------
   Responsive: Mobile (<768px)
   ------------------------------------------------------------------ */
@media (max-width: 768px) {
  .header__top {
    display: none;
  }

  .header__main {
    height: 64px;
  }

  .header__mobile-nav {
    width: 280px;
  }

  .header__logo {
    font-size: var(--text-xl);
  }
}

/* ------------------------------------------------------------------
   Responsive: Small Mobile (<480px)
   ------------------------------------------------------------------ */
@media (max-width: 480px) {
  .header__mobile-nav {
    width: 100%;
    max-width: 100vw;
  }
}