/* ==========================================================================
   HEADER & NAVIGATION STYLES
   ========================================================================== */

/* Sticky Header Base */
.bi-site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bi-neutral-0);
  border-bottom: 1px solid var(--bi-neutral-200);
  transition: var(--bi-transition);
}

.bi-site-header.bi-is-scrolled {
  box-shadow: var(--bi-shadow-md);
}

.bi-header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

/* Brand Logo */
.bi-header-logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.bi-logo-text {
  font-family: var(--bi-font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--bi-primary-900);
  line-height: 1;
  letter-spacing: -0.02em;
}

.bi-logo-accent {
  color: var(--bi-primary-500);
}

.bi-logo-subtext {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--bi-neutral-500);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: 2px;
}

/* Desktop Navigation Links */
.bi-primary-nav {
  display: none;
}

@media (min-width: 992px) {
  .bi-primary-nav {
    display: block;
  }
}

.bi-nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.75rem;
}

.bi-nav-link {
  font-family: var(--bi-font-heading);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--bi-neutral-800);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem 0;
}

.bi-nav-link:hover {
  color: var(--bi-primary-600);
}

.bi-chevron-icon {
  transition: transform 0.2s ease;
}

.bi-nav-item.bi-has-megamenu:hover .bi-chevron-icon {
  transform: rotate(180deg);
}

/* Mega Menu Activation */
.bi-nav-item.bi-has-megamenu {
  position: static;
}

.bi-megamenu-panel {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background-color: var(--bi-neutral-0);
  border-bottom: 2px solid var(--bi-primary-100);
  box-shadow: var(--bi-shadow-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: var(--bi-transition);
  pointer-events: none;
}

.bi-nav-item.bi-has-megamenu:hover .bi-megamenu-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.bi-megamenu-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  padding-top: 2rem;
  padding-bottom: 2.5rem;
}

.bi-megamenu-heading {
  display: block;
  font-family: var(--bi-font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--bi-neutral-500);
  margin-bottom: 1rem;
}

.bi-megamenu-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.bi-megamenu-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.5rem;
  border-radius: var(--bi-radius-sm);
}

.bi-megamenu-item:hover {
  background-color: var(--bi-primary-50);
}

.bi-flag-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.bi-megamenu-item strong {
  display: block;
  font-size: 0.875rem;
  color: var(--bi-neutral-900);
}

.bi-megamenu-item small {
  display: block;
  font-size: 0.75rem;
  color: var(--bi-neutral-500);
  line-height: 1.2;
}

.bi-megamenu-simple a {
  font-size: 0.875rem;
  color: var(--bi-neutral-700);
  font-weight: 500;
}

.bi-megamenu-simple a:hover {
  color: var(--bi-primary-600);
}

.bi-megamenu-card {
  background-color: var(--bi-neutral-100);
  padding: 1.25rem;
  border-radius: var(--bi-radius-md);
  border: 1px solid var(--bi-neutral-200);
}

.bi-megamenu-banner h4 {
  font-size: 1rem;
  margin: 0.5rem 0;
}

.bi-megamenu-banner p {
  font-size: 0.8125rem;
  color: var(--bi-neutral-600);
  margin-bottom: 1rem;
}

/* Button UI Components */
.bi-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--bi-font-heading);
  font-weight: 600;
  border-radius: var(--bi-radius-md);
  transition: var(--bi-transition);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.bi-btn-sm {
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
}

.bi-btn-block {
  width: 100%;
  padding: 0.75rem 1rem;
}

.bi-btn-accent {
  background-color: var(--bi-accent-500);
  color: var(--bi-neutral-0);
}

.bi-btn-accent:hover {
  background-color: var(--bi-accent-600);
  color: var(--bi-neutral-0);
  box-shadow: var(--bi-shadow-md);
}

.bi-btn-primary {
  background-color: var(--bi-primary-600);
  color: var(--bi-neutral-0);
}

.bi-btn-primary:hover {
  background-color: var(--bi-primary-800);
  color: var(--bi-neutral-0);
}

.bi-badge {
  display: inline-block;
  background-color: var(--bi-primary-100);
  color: var(--bi-primary-600);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.25rem 0.5rem;
  border-radius: var(--bi-radius-sm);
}

/* Mobile Toggle Hamburger */
.bi-mobile-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
}

@media (min-width: 992px) {
  .bi-mobile-toggle {
    display: none;
  }
}

.bi-hamburger-bar {
  width: 100%;
  height: 2px;
  background-color: var(--bi-neutral-900);
  border-radius: 2px;
  transition: var(--bi-transition);
}

/* Mobile Drawer Shell */
.bi-drawer-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.6);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: var(--bi-transition);
}

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

.bi-mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 85%;
  max-width: 380px;
  background-color: var(--bi-neutral-0);
  z-index: 1100;
  transform: translateX(100%);
  transition: var(--bi-transition);
  display: flex;
  flex-direction: column;
  box-shadow: var(--bi-shadow-xl);
}

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

.bi-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--bi-neutral-200);
}

.bi-drawer-close {
  font-size: 2rem;
  background: none;
  border: none;
  cursor: pointer;
  line-height: 1;
  color: var(--bi-neutral-600);
}

.bi-drawer-content {
  padding: 1.5rem;
  overflow-y: auto;
  flex: 1;
}

.bi-mobile-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.bi-mobile-menu a {
  font-family: var(--bi-font-heading);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--bi-neutral-900);
}

.bi-mobile-submenu {
  list-style: none;
  padding-left: 1rem;
  margin-top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.bi-mobile-submenu a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--bi-neutral-600);
}

.bi-drawer-footer {
  margin-top: 2rem;
}

/* Mobile Sticky Conversion Bar */
.bi-mobile-sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background-color: var(--bi-neutral-0);
  border-top: 1px solid var(--bi-neutral-200);
  z-index: 990;
  display: flex;
  align-items: center;
  justify-content: space-around;
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.08);
}

@media (min-width: 992px) {
  .bi-mobile-sticky-bar {
    display: none;
  }
}

.bi-sticky-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: var(--bi-neutral-700);
  font-size: 0.6875rem;
  font-weight: 600;
  flex: 1;
  height: 100%;
}

.bi-sticky-whatsapp {
  color: #25D366;
}

.bi-sticky-highlight {
  background-color: var(--bi-accent-500);
  color: var(--bi-neutral-0);
}

/* Hide Desktop CTA button on mobile/tablet screens */
@media (max-width: 991px) {
  .bi-desktop-cta-btn {
    display: none !important;
  }
}