/* ============================================================
   V5 NAVIGATION — Frosted glass, always dark
   Matches prototype/index.html nav specification
   ============================================================ */

/* --- Site header base --- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 68px;
  display: flex;
  align-items: center;
  padding: 0 clamp(16px, 4vw, 64px);
  background: transparent;
  transition: all .5s var(--e);
}

/* Scrolled state — frosted glass */
.site-header.nav-scrolled {
  background: rgba(6,13,20,.92);
  backdrop-filter: blur(28px) saturate(1.3);
  -webkit-backdrop-filter: blur(28px) saturate(1.3);
  box-shadow: 0 1px 0 var(--t4), 0 8px 32px rgba(0,0,0,.3);
}

/* --- Nav inner container --- */
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

/* --- Logo --- */
.site-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}
.site-logo img {
  height: 26px;
  width: auto;
  opacity: .95;
  transition: opacity .25s;
}
.site-logo:hover img { opacity: 1 }

/* Always show light logo on dark site */
.site-logo-light { display: block !important }
.site-logo-dark { display: none !important }

/* --- Nav menu links --- */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-family: 'Poppins', 'Poppins-fallback', sans-serif;
  font-weight: 500;
  font-size: .6rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--t2);
  transition: color .25s;
  position: relative;
  padding: 4px 0;
  text-decoration: none;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -6px; left: 0;
  width: 0; height: 1px;
  background: var(--sky);
  transition: width .35s var(--e);
}
.nav-link:hover { color: var(--t1) }
.nav-link:focus-visible {
  outline: 2px solid var(--sky);
  outline-offset: 3px;
  border-radius: 4px;
}
.nav-link:hover::after,
.nav-link.active::after { width: 100% }

/* --- Schedule CTA button in nav --- */
.nav-cta { margin-left: 8px }
.nav-cta a {
  border: 1px solid var(--t3);
  padding: 8px 20px;
  border-radius: 999px;
  font-size: .6rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  transition: all .3s var(--e);
  color: var(--t1);
  text-decoration: none;
}
.nav-cta a:hover {
  background: var(--sky);
  border-color: var(--sky);
}
.nav-cta a::after { display: none }

/* --- Hamburger --- */
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 102;
}
.nav-hamburger span {
  display: block;
  width: 20px; height: 1.5px;
  background: var(--t2);
  margin: 4.5px 0;
  transition: all .3s var(--e);
}
.nav-hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(4px, 4px) }
.nav-hamburger.open span:nth-child(2) { opacity: 0 }
.nav-hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(4px, -4px) }

/* --- Mobile overlay --- */
.mobile-nav-overlay {
  display: none;
  position: fixed; inset: 0;
  z-index: 101;
  background: rgba(6,13,20,.97);
  backdrop-filter: blur(32px);
  -webkit-backdrop-filter: blur(32px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.mobile-nav-overlay.open { display: flex }

.mobile-nav-link {
  font-family: 'Fraunces', 'Fraunces-fallback', serif;
  font-weight: 200;
  font-size: 2rem;
  color: var(--t2);
  letter-spacing: -.02em;
  padding: 8px 0;
  transition: color .25s;
  text-decoration: none;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .4s var(--e2), transform .4s var(--e2), color .25s;
}
.mobile-nav-overlay.open .mobile-nav-link {
  opacity: 1;
  transform: translateY(0);
}
.mobile-nav-overlay.open .mobile-nav-link:nth-child(2) { transition-delay: 80ms }
.mobile-nav-overlay.open .mobile-nav-link:nth-child(3) { transition-delay: 160ms }
.mobile-nav-overlay.open .mobile-nav-link:nth-child(4) { transition-delay: 240ms }
.mobile-nav-overlay.open .mobile-nav-link:nth-child(5) { transition-delay: 320ms }
.mobile-nav-overlay.open .mobile-nav-link:nth-child(6) { transition-delay: 400ms }
.mobile-nav-overlay.open .mobile-nav-link:nth-child(7) { transition-delay: 480ms }

/* Mobile sub-links (quick access to key services) */
.mobile-sub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 4px 0 16px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .4s var(--e2), transform .4s var(--e2);
}
.mobile-nav-overlay.open .mobile-sub-links {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 200ms;
}
.mobile-sub-links a {
  padding: 6px 16px;
  border-radius: 999px;
  border: 1px solid var(--t4);
  background: rgba(255,255,255,.04);
  color: var(--t2);
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .02em;
  text-decoration: none;
  transition: all .25s var(--e);
}
.mobile-sub-links a:hover {
  background: var(--sky);
  border-color: var(--sky);
  color: #fff;
}
.mobile-sub-links a:focus-visible {
  outline: 2px solid var(--sky);
  outline-offset: 2px;
  border-radius: 999px;
}

.mobile-nav-link:hover { color: var(--skyL) }
.mobile-nav-link:focus-visible {
  outline: 2px solid var(--sky);
  outline-offset: 2px;
  border-radius: 4px;
}

.mobile-nav-link.mob-cta {
  margin-top: 24px;
  font-family: 'Poppins', 'Poppins-fallback', sans-serif;
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  background: var(--sky);
  color: #fff;
  padding: 14px 32px;
  border-radius: 999px;
}

/* Mobile close button */
.mobile-close {
  position: absolute;
  top: 20px; right: 24px;
  background: none; border: none;
  cursor: pointer;
  color: var(--t2);
  font-size: 1.8rem;
  line-height: 1;
  padding: 8px;
  z-index: 10;
}

/* --- Responsive --- */
@media (max-width: 1023px) {
  .nav-menu { display: none }
  .nav-hamburger { display: block }
  .site-header { height: 56px }
}

/* --- Kill GP default nav --- */
.main-navigation,
.inside-navigation,
#site-navigation {
  display: none !important;
}

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  .mobile-nav-link {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* Homepage: nav sits below topbar */
body.home .site-header {
  top: 36px;
}
body.home .site-header.nav-scrolled {
  top: 0;
}
@media (max-width: 767px) {
  /* Topbar hidden on mobile, nav goes to top */
  body.home .site-header {
    top: 0;
  }
}

/* ============================================================
   DROPDOWN MENUS — Frosted glass, V5 aesthetic
   ============================================================ */

.has-dropdown {
  position: relative;
}

.dd-chevron {
  display: inline-block;
  vertical-align: middle;
  margin-left: 2px;
  transition: transform .3s var(--e);
}
.has-dropdown:hover .dd-chevron {
  transform: rotate(180deg);
}

.dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 200px;
  background: rgba(6,13,20,.95);
  backdrop-filter: blur(28px) saturate(1.3);
  -webkit-backdrop-filter: blur(28px) saturate(1.3);
  border: 1px solid var(--t4);
  border-radius: 12px;
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s var(--e), transform .25s var(--e), visibility .25s;
  z-index: 200;
  box-shadow: 0 16px 48px rgba(0,0,0,.4);
}

.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown a {
  display: block;
  padding: 10px 20px;
  font-family: 'Poppins', 'Poppins-fallback', sans-serif;
  font-size: .65rem;
  font-weight: 400;
  letter-spacing: .08em;
  color: var(--t2);
  text-decoration: none;
  text-transform: none;
  transition: color .2s, background .2s;
  white-space: nowrap;
}

.dropdown a:hover {
  color: var(--t1);
  background: rgba(255,255,255,.04);
}

.dropdown a:first-child {
  border-radius: 8px 8px 0 0;
}

.dropdown a:last-child {
  border-radius: 0 0 8px 8px;
}

/* First item (hub link) gets subtle emphasis */
.dropdown a:first-child {
  font-weight: 500;
  color: var(--skyL);
  border-bottom: 1px solid var(--t4);
  padding-bottom: 10px;
  margin-bottom: 4px;
}

/* Hover line under dropdown parent links — disable since dropdown handles it */
.has-dropdown > .nav-link::after {
  display: none;
}

/* Keep the parent link hover color */
.has-dropdown:hover > .nav-link {
  color: var(--t1);
}

/* Scrolled state: dropdown stays dark regardless */
.site-header.nav-scrolled .dropdown {
  background: rgba(6,13,20,.97);
}

/* Mobile: hide dropdowns (mobile overlay handles navigation) */
@media (max-width: 1023px) {
  .dropdown { display: none }
  .dd-chevron { display: none }
}