/* ==========================================================================
   Varnamala Technologies – Header & Navigation Styles
   Source: Header & Navigation Sheet
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: var(--soft);
  border-bottom: 1px solid var(--line);
  z-index: 1000;
  transition: background-color var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
  background-color: rgba(243, 245, 246, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Brand Logo */
.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

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

/* Desktop Navigation */
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 28px;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-family: var(--font-body);
  font-size: var(--nav-size);
  font-weight: 700;
  color: var(--body);
  padding: 12px 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition);
}

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

.caret-icon {
  width: 10px;
  height: 10px;
  transition: transform var(--transition);
}

.nav-item:hover .caret-icon {
  transform: rotate(180deg);
}

/* Dropdown Menus */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 280px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 1001;
}

.dropdown-menu.mega-menu {
  min-width: 580px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.dropdown-link {
  display: block;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  transition: background var(--transition), color var(--transition);
}

.dropdown-link:hover {
  background-color: var(--soft);
  color: var(--blue);
}

.dropdown-desc {
  display: block;
  font-size: 12px;
  color: var(--muted);
  font-weight: 400;
  margin-top: 2px;
}

/* Header Right Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.partner-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 700;
  color: var(--navy);
}

.partner-badge .sap-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--gold);
}

.btn-contact-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  font-family: var(--font-body);
  font-size: var(--btn-size);
  font-weight: 800;
  color: var(--body);
  background-color: transparent;
  border: 2px solid var(--body);
  border-radius: var(--radius-pill);
  text-decoration: none;
  transition: all var(--transition);
}

.btn-contact-nav:hover {
  background-color: var(--body);
  color: var(--white);
}

/* Mobile Hamburger Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 12px;
  min-width: 48px;
  min-height: 48px;
  align-items: center;
  justify-content: center;
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--ink);
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger-line + .hamburger-line {
  margin-top: 5px;
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  max-width: 380px;
  height: 100vh;
  background-color: var(--white);
  box-shadow: var(--shadow-lg);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 24px;
}

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

.drawer-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(18, 33, 42, 0.4);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
  z-index: 1999;
}

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

/* Responsive Header Breakpoints */
@media (max-width: 1024px) {
  .site-header {
    height: var(--header-height-mobile);
  }
  .desktop-nav,
  .partner-badge {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }
}