/* Header */
.site-header {
  position: sticky; top: 0; z-index: 1000; background: #fff;
  border-bottom: 1px solid var(--color-divider);
}
.utility-bar {
  background: var(--color-navy); color: var(--color-on-dark-muted); font-size: 12.5px;
}
.utility-bar__inner {
  min-height: var(--header-utility);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.utility-bar__meta { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; }
.utility-bar__item { color: var(--color-on-dark-muted); }
.utility-bar a.utility-bar__item:hover { color: var(--color-orange); }
.utility-bar__item--muted { opacity: .85; }

.nav-bar__inner {
  min-height: var(--header-nav);
  display: flex; align-items: center; gap: 16px;
}
.primary-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
  min-width: 0; /* allow shrink without forcing line wraps inside links */
  position: static;
}
.primary-nav__list {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  position: relative;
  z-index: 2;
}
.primary-nav__item { flex: 0 0 auto; }
.primary-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-heading);
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--color-navy);
  padding: 10px 8px;
  border-radius: var(--radius-1);
  white-space: nowrap; /* keep VI labels on one line */
}
.primary-nav__link:hover, .primary-nav__item.is-active > .primary-nav__link {
  color: var(--color-orange);
}
.primary-nav__link--btn { background: transparent; }
.caret {
  width: 0; height: 0; border-left: 3.5px solid transparent; border-right: 3.5px solid transparent;
  border-top: 4.5px solid currentColor; opacity: .7; flex: none;
}
.nav-bar__cta {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
}
/* Compact CTA so primary nav has room for long VI labels */
.nav-bar__cta .btn {
  min-height: 40px;
  padding: 0 14px;
  font-size: 13.5px;
}
.nav-bar__cta .icon-btn {
  width: 40px;
  height: 40px;
}
.nav-bar .logo {
  flex: 0 0 auto;
  max-width: 148px;
}
.nav-bar .logo__img {
  height: 48px;
  max-width: 148px;
}
.menu-toggle { display: none; flex-direction: column; gap: 5px; }
.menu-toggle__bar { width: 20px; height: 1.8px; background: currentColor; display: block; }

/* Mega menu */
.mega-menu {
  position: absolute; left: 0; right: 0; top: 100%;
  background: #fff; border-bottom: 1px solid var(--color-divider);
  box-shadow: var(--shadow-md); padding: 36px 0 40px;
}
.primary-nav { position: static; }
.site-header { position: sticky; }
.nav-bar { position: relative; }
.mega-menu__inner { display: grid; grid-template-columns: 280px 1fr; gap: 40px; }
.mega-menu__inner--compact {
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding-top: 8px;
  padding-bottom: 8px;
}
.mega-menu__title { font-size: 22px; margin: 12px 0 12px; }
.mega-menu__desc { font-size: 14.5px; color: var(--color-steel); line-height: 1.65; margin-bottom: 20px; }
.mega-menu__cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.mega-menu__inner--compact .mega-menu__cols { gap: 32px; }
.mega-col__head { display: block; margin-bottom: 14px; padding-bottom: 12px; border-bottom: 2px solid var(--div-color); }
.mega-col__code { display: block; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; color: var(--div-color); margin-bottom: 6px; }
.mega-col__title { font-family: var(--font-heading); font-weight: 700; font-size: 18px; color: var(--color-navy); }
.mega-col__list a { display: block; padding: 10px 0; border-bottom: 1px solid var(--color-divider); }
.mega-col__list--compact a { padding: 11px 0; border-bottom: 1px solid var(--color-divider); }
.mega-col__link-title { display: block; font-weight: 600; font-size: 14.5px; color: var(--color-navy); }
.mega-col__link-sub { display: block; font-size: 12.5px; color: var(--color-steel); margin-top: 3px; }
.mega-col__list a:hover .mega-col__link-title { color: var(--color-orange); }
.mega-col__link-simple { display: block; }
.mega-col__link-simple:hover .mega-col__link-title { color: var(--color-orange); }
.mega-menu__footer-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: flex-end;
  padding-top: 8px;
  border-top: 1px solid var(--color-divider);
}

/* Compact dropdown (About / Capabilities) */
.primary-nav__item.has-dropdown { position: relative; }
.nav-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 280px;
  max-width: min(360px, 92vw);
  background: #fff;
  border: 1px solid var(--color-divider);
  box-shadow: var(--shadow-md);
  padding: 16px 18px 14px;
  z-index: 1100;
}
/* Safe bridge between trigger and panel */
.nav-dropdown::before {
  content: "";
  position: absolute;
  left: 0; right: 0;
  top: -14px;
  height: 14px;
}
.nav-dropdown__intro {
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-steel);
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-divider);
}
.nav-dropdown__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.nav-dropdown__link {
  display: block;
  padding: 10px 8px;
  border-radius: var(--radius-1);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 14.5px;
  color: var(--color-navy);
  white-space: nowrap;
}
.nav-dropdown__link:hover,
.nav-dropdown__link.is-active {
  background: #F4F6F7;
  color: var(--color-orange);
}
.primary-nav__item.has-dropdown.is-open > .primary-nav__link,
.primary-nav__item.has-mega .primary-nav__link[aria-expanded="true"] {
  color: var(--color-orange);
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 1100;
  background: rgba(12,27,42,.55);
  height: 100%;
  max-height: 100dvh;
  overscroll-behavior: contain;
}
.mobile-menu[hidden] {
  display: none !important;
}
.mobile-menu__panel {
  position: absolute;
  inset: 0 0 0 auto;
  width: min(100%, 420px);
  max-height: 100%;
  background: #fff;
  display: flex;
  flex-direction: column;
  padding: 20px;
  overflow: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}
.mobile-menu__top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; gap: 12px; }
.mobile-menu__top-actions { display: inline-flex; align-items: center; gap: 4px; }
/* Search above mobile drawer when opened from menu */
.search-overlay { z-index: 1200; }
.mobile-menu__nav a, .mobile-acc__btn {
  display: flex; width: 100%; text-align: left; align-items: center; justify-content: space-between;
  min-height: 48px;
  padding: 12px 4px; border-bottom: 1px solid var(--color-divider);
  font-family: var(--font-heading); font-weight: 600; font-size: 17px; color: var(--color-navy);
  gap: 12px;
}
.mobile-acc__btn--sub { font-size: 15.5px; color: var(--color-graphite); }
.mobile-acc__chev {
  width: 10px; height: 10px; flex: none;
  border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
  transform: rotate(45deg); transition: transform .2s ease; margin-right: 6px; opacity: .7;
}
.mobile-acc__btn[aria-expanded="true"] .mobile-acc__chev {
  transform: rotate(-135deg); margin-top: 4px;
}
.mobile-acc__panel { padding: 4px 0 12px 10px; }
.mobile-acc__panel > a { font-size: 15px; font-weight: 500; padding: 12px 4px; min-height: 44px; }
.mobile-acc__div { color: var(--color-orange) !important; margin-top: 4px; }
.mobile-acc.nested-acc { border-bottom: 1px solid var(--color-divider); }
.mobile-menu__footer { margin-top: auto; display: grid; gap: 10px; padding-top: 24px; }

/* Search overlay */
.search-overlay {
  position: absolute; left: 0; right: 0; top: 100%; background: #fff;
  border-bottom: 1px solid var(--color-divider); box-shadow: var(--shadow-md);
  padding: 20px 0;
}
.search-form { display: flex; gap: 12px; align-items: center; width: min(100% - 48px, var(--container)); margin: 0 auto; }
.search-form input {
  flex: 1; min-height: 48px; border: 1.5px solid var(--color-border); padding: 0 14px; border-radius: var(--radius-1);
}

/* Footer */
.site-footer { background: var(--color-navy); color: var(--color-on-dark-dim); margin-top: auto; }
.footer-cta {
  background: var(--color-navy-raised); border-bottom: 1px solid rgba(255,255,255,.06);
  padding: 48px 0;
}
.footer-cta__inner { display: flex; justify-content: space-between; gap: 32px; align-items: center; flex-wrap: wrap; }
.footer-cta__title { color: #fff; font-size: 28px; margin-bottom: 10px; }
.footer-cta__sub { color: var(--color-on-dark-soft); max-width: 560px; }
.footer-cta__actions { display: flex; gap: 12px; flex-wrap: wrap; }
.footer-main { padding: 64px 0 48px; }
.footer-main__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.1fr; gap: 40px; }
.footer-tagline { color: var(--color-on-dark-soft); margin: 16px 0 20px; font-size: 15.5px; line-height: 1.7; font-weight: 600; }
.footer-legal-lines { display: grid; gap: 8px; font-size: 14px; line-height: 1.6; }
.footer-legal-lines a { color: var(--color-on-dark-soft); }
.footer-legal-lines a:hover { color: var(--color-orange); }
.footer-col__title {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em;
  color: var(--color-orange); margin-bottom: 16px;
}
.footer-col__title--sm { margin-top: 28px; }
.footer-links { display: grid; gap: 10px; }
.footer-links a { color: var(--color-on-dark-soft); font-size: 14.5px; }
.footer-links a.is-sub { color: var(--color-on-dark-muted); font-size: 13.5px; padding-left: 10px; }
.footer-links a:hover { color: var(--color-orange); }
.footer-col__desc { font-size: 14.5px; line-height: 1.65; margin-bottom: 16px; color: var(--color-on-dark-muted); }
.footer-hours { font-size: 14px; color: var(--color-on-dark-soft); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08); padding: 18px 0; font-size: 13px;
}
.footer-bottom__links {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.footer-bottom__sep { color: var(--color-on-dark-muted); opacity: .6; }
.footer-credit { color: var(--color-on-dark-muted); }
.footer-credit a {
  color: var(--color-on-dark-soft);
  font-weight: 600;
  text-decoration: none;
}
.footer-credit a:hover { color: var(--color-orange); }

/* Back to top — icon only */
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 24px;
  z-index: 900;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--color-navy);
  color: #fff;
  box-shadow: 0 8px 24px rgba(12, 27, 42, 0.28);
  cursor: pointer;
  transition: opacity .2s ease, transform .2s ease, background .2s ease;
}
.back-to-top:hover { background: var(--color-orange); color: var(--color-navy); }
.back-to-top[hidden] { display: none !important; }
.footer-bottom__inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--color-on-dark-muted); }
.footer-bottom a { color: var(--color-on-dark-muted); }
.footer-bottom a:hover { color: var(--color-orange); }
@media (max-width: 768px) {
  .back-to-top {
    right: 14px;
    bottom: 88px; /* above sticky mobile CTA */
    width: 44px;
    height: 44px;
  }
  .footer-bottom__inner { flex-direction: column; align-items: flex-start; }
}

/* Page hero */
.page-hero {
  background: var(--color-navy); color: #fff; padding: 56px 0 64px;
  border-bottom: 4px solid var(--color-orange);
}
.page-hero .eyebrow { margin-bottom: 16px; }
.page-hero h1 { color: #fff; max-width: 900px; }
.page-hero .lead { color: var(--color-on-dark-soft); margin-top: 18px; max-width: 720px; }
.page-hero .breadcrumbs { padding-top: 0; margin-bottom: 24px; }
.page-hero .breadcrumbs, .page-hero .breadcrumbs a, .page-hero .breadcrumbs span { color: var(--color-on-dark-muted); }
.page-hero .breadcrumbs__item:not(:last-child)::after { color: rgba(255,255,255,.25); }

/* Sticky mobile CTA — pinned to visual bottom (JS may set --sticky-cta-offset) */
.sticky-cta {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  bottom: var(--sticky-cta-offset, 0px);
  z-index: 900;
  width: 100%;
  max-width: 100%;
  margin: 0;
  box-sizing: border-box;
  background: var(--color-navy);
  padding: 12px 16px;
  gap: 10px;
  border-top: 1px solid rgba(255,255,255,.08);
  padding-bottom: max(12px, env(safe-area-inset-bottom, 0px));
  flex-direction: row;
  align-items: center;
  transform: translateZ(0); /* own layer; avoid mid-screen float bugs */
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}