/* ==========================================================================
   MISSIONARY TRAINING COLLEGE (MTC) — HEADER & NAVIGATION STYLES
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. UTILITY / SYNOD TOP BAR
   -------------------------------------------------------------------------- */
.top-utility-bar {
  background-color: var(--color-primary-900);
  color: var(--color-text-light-muted);
  font-size: var(--font-size-xs);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.45rem 0;
  position: relative;
  z-index: 100;
}

.top-utility-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.utility-affiliation {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: var(--font-weight-medium);
}

.utility-motto {
  color: var(--color-accent-400);
  font-style: italic;
  font-family: var(--font-family-serif);
  letter-spacing: 0.05em;
  font-weight: var(--font-weight-semibold);
}

.utility-contact-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.utility-contact-links a {
  color: var(--color-text-light-muted);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: color var(--transition-fast);
}

.utility-contact-links a:hover {
  color: var(--color-text-light);
}

/* --------------------------------------------------------------------------
   2. MAIN SITE HEADER & STICKY BEHAVIOR
   -------------------------------------------------------------------------- */
.site-header {
  background-color: var(--color-surface-white);
  border-bottom: 1px solid var(--color-border-subtle);
  position: sticky;
  top: 0;
  z-index: 990;
  transition: box-shadow var(--transition-normal), background-color var(--transition-normal), padding var(--transition-fast);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-md);
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  min-height: 72px;
}

/* --------------------------------------------------------------------------
   3. BRAND IDENTITY / LOGO
   -------------------------------------------------------------------------- */
.brand-identity {
  display: flex;
  align-items: center;
  gap: 0.95rem;
  text-decoration: none;
  color: var(--color-primary-900);
  flex-shrink: 0;
}

.brand-identity:hover {
  text-decoration: none;
}

.brand-logo-img {
  width: 58px;
  height: 58px;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(15, 39, 66, 0.1));
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.brand-identity:hover .brand-logo-img {
  transform: scale(1.04);
}

.brand-text-block {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.brand-title {
  font-family: var(--font-family-serif);
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  line-height: 1.15;
  color: var(--color-primary-900);
  letter-spacing: -0.01em;
}

.brand-subtitle {
  font-size: 0.8rem;
  color: var(--color-primary-700);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: 2px;
}

/* --------------------------------------------------------------------------
   4. DESKTOP NAVIGATION & ACCESSIBLE DROPDOWNS
   -------------------------------------------------------------------------- */
.desktop-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.35rem;
}

.nav-item {
  position: relative;
}

.nav-link,
.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem 0.85rem;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary-800);
  text-decoration: none;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  cursor: pointer;
  line-height: 1.2;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-link:hover,
.nav-dropdown-toggle:hover {
  color: var(--color-primary-900);
  background-color: var(--color-primary-50);
  text-decoration: none;
}

/* Active Navigation Page Indicator */
.nav-item.is-active > .nav-link,
.nav-link[aria-current="page"] {
  color: var(--color-primary-900);
  background-color: var(--color-primary-100);
  font-weight: var(--font-weight-bold);
}

.nav-item.is-active > .nav-link::after,
.nav-link[aria-current="page"]::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0.85rem;
  right: 0.85rem;
  height: 2px;
  background-color: var(--color-accent-500);
  border-radius: var(--radius-pill);
}

/* Dropdown Arrow Icon */
.dropdown-icon {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.nav-item:hover .dropdown-icon,
.nav-item.is-open .dropdown-icon,
.nav-dropdown-toggle[aria-expanded="true"] .dropdown-icon {
  transform: rotate(180deg);
}

/* Dropdown Menu Container */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 250px;
  background-color: var(--color-surface-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-medium);
  box-shadow: var(--shadow-xl);
  padding: 0.5rem 0;
  list-style: none;
  margin: 0.35rem 0 0 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
  z-index: 1000;
}

/* Dropdown Large for About section */
.dropdown-menu.dropdown-menu-wide {
  min-width: 280px;
  max-height: 420px;
  overflow-y: auto;
}

/* Show Dropdown on Hover or Keyboard Focus */
.nav-item:hover > .dropdown-menu,
.nav-item:focus-within > .dropdown-menu,
.nav-item.is-open > .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  margin: 0;
}

.dropdown-link {
  display: block;
  padding: 0.55rem 1.15rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: background-color var(--transition-fast), color var(--transition-fast), padding-left var(--transition-fast);
  border-left: 3px solid transparent;
}

.dropdown-link:hover,
.dropdown-link:focus {
  background-color: var(--color-primary-50);
  color: var(--color-primary-800);
  border-left-color: var(--color-accent-500);
  padding-left: 1.35rem;
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   5. MOBILE HAMBURGER BUTTON
   -------------------------------------------------------------------------- */
.mobile-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: var(--color-surface-white);
  border: 1.5px solid var(--color-primary-900);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
  z-index: 1001;
  color: var(--color-primary-900);
  box-shadow: var(--shadow-sm);
}

.mobile-nav-toggle:hover,
.mobile-nav-toggle:focus-visible {
  background-color: var(--color-primary-50);
  border-color: var(--color-primary-800);
  outline: 2px solid var(--color-accent-500);
}

.hamburger-line,
.hamburger-bar {
  display: block;
  width: 22px;
  height: 2.5px;
  background-color: var(--color-primary-900);
  border-radius: var(--radius-pill);
  transition: transform var(--transition-normal), opacity var(--transition-normal), background-color var(--transition-normal);
}

/* Hamburger Active / Open Transform */
.mobile-nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(1),
.mobile-nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.mobile-nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(2),
.mobile-nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(2) {
  opacity: 0;
}

.mobile-nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(3),
.mobile-nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   6. MOBILE NAVIGATION DRAWER & BACKDROP
   -------------------------------------------------------------------------- */
.mobile-nav-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(10, 27, 45, 0.6);
  backdrop-filter: blur(4px);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

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

.mobile-nav-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 86vw;
  max-width: 380px;
  height: 100vh;
  background-color: var(--color-surface-white);
  box-shadow: var(--shadow-xl);
  z-index: 999;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

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

.mobile-drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem;
  border-bottom: 1px solid var(--color-border-subtle);
  background-color: var(--color-primary-50);
}

.mobile-drawer-close {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-primary-900);
}

.mobile-drawer-close:hover {
  background-color: var(--color-surface-white);
}

.mobile-nav-list {
  list-style: none;
  padding: 1rem 0.75rem;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.mobile-nav-item {
  border-bottom: 1px solid var(--color-border-subtle);
  padding-bottom: 0.35rem;
}

.mobile-nav-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  min-height: 48px;
  padding: 0.85rem 1rem;
  font-family: var(--font-family-sans);
  font-size: 1.05rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary-900);
  text-decoration: none;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  text-align: left;
  cursor: pointer;
  -webkit-tap-highlight-color: rgba(15, 39, 66, 0.1);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link:active,
.mobile-nav-link:focus-visible {
  background-color: var(--color-primary-50);
  color: var(--color-primary-800);
  text-decoration: none;
  outline: none;
}

.mobile-nav-link .dropdown-icon,
.mobile-nav-link .mobile-chevron {
  width: 18px;
  height: 18px;
  color: var(--color-primary-800);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.mobile-submenu-toggle[aria-expanded="true"] .dropdown-icon,
.mobile-submenu-toggle[aria-expanded="true"] .mobile-chevron {
  transform: rotate(180deg);
}

.mobile-submenu {
  list-style: none;
  padding: 0.35rem 0 0.5rem 0.5rem;
  margin: 0;
  display: none;
  flex-direction: column;
  gap: 0.35rem;
}

.mobile-submenu.is-expanded {
  display: flex;
}

.mobile-submenu-link,
.mobile-sublink {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-weight: var(--font-weight-normal);
  -webkit-tap-highlight-color: rgba(15, 39, 66, 0.1);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.mobile-submenu-link:hover,
.mobile-sublink:hover,
.mobile-submenu-link:active,
.mobile-sublink:active,
.mobile-submenu-link:focus-visible,
.mobile-sublink:focus-visible {
  color: var(--color-primary-900);
  background-color: var(--color-primary-50);
  text-decoration: none;
}

.mobile-submenu-link.is-active,
.mobile-sublink.is-active,
.mobile-submenu-link[aria-current="page"],
.mobile-sublink[aria-current="page"] {
  color: var(--color-primary-900);
  font-weight: var(--font-weight-bold);
  background-color: var(--color-primary-100);
  border-left: 4px solid var(--color-accent-500);
  padding-left: calc(1rem - 4px);
}

.mobile-drawer-footer {
  margin-top: auto;
  padding: 1.25rem;
  background-color: var(--color-surface-stone);
  border-top: 1px solid var(--color-border-subtle);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}