/* ===========================================================================
   HEADER — transparent over hero; frosted light on scroll
=========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  min-height: var(--header-h);
  padding: 0 var(--space-5);
  background: transparent;
  box-shadow: none;
  transition:
    background-color 0.3s ease,
    backdrop-filter 0.3s ease,
    -webkit-backdrop-filter 0.3s ease,
    box-shadow 0.3s ease,
    border-color 0.3s ease,
    transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

/* Only apply transform when hiding — avoids a permanent containing block
   that can limit how descendant backdrop-filter samples the page. */
.site-header.is-hidden {
  transform: translateY(-100%);
  pointer-events: none;
}

/* Lightest-white frosted bar on scroll / solid inner pages */
.site-header.is-scrolled,
body.page-solid .site-header {
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  box-shadow: 0 0 0 rgba(0, 0, 0, 0);
}

.site-header .container {
  position: relative;
  z-index: 2;
}

.header-inner {
  /* Equal side columns pin the nav dead-center; logo/CTA size changes won't shift it */
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  column-gap: var(--space-3);
  min-height: var(--header-h);
  transition: min-height 0.3s ease;
}

.site-header.is-scrolled .header-inner {
  min-height: calc(var(--header-h) - 8px);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  justify-self: start;
  color: var(--color-white);
}

/* Inner pages: navy wordmark for legibility on light header (mark size/fills match index) */
.site-header.is-scrolled .logo,
body.page-solid .site-header .logo {
  color: var(--color-black);
}

.logo-mark {
  width: var(--space-8);
  height: auto;
  display: block;
  margin-top: -1px;
  transition: width 0.3s ease, filter 0.3s ease;
}

/* Default — same as index: navy shell, white monogram */
.logo-mark path:first-child {
  fill: var(--color-navy);
  transition: fill 0.3s ease;
}

.logo-mark path:last-child {
  fill: var(--color-white);
  transition: fill 0.3s ease;
}

/* On scroll only: white ↔ blue swap + smaller icon (index + property) */
.site-header.is-scrolled .logo-mark {
  width: var(--space-5);
}

.site-header.is-scrolled .logo-mark path:first-child {
  fill: var(--color-white);
}

.site-header.is-scrolled .logo-mark path:last-child {
  fill: var(--color-navy);
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  line-height: 1;
  letter-spacing: -1.5px;
  color: var(--color-white);
  white-space: nowrap;
  transition: color 0.3s ease, font-size 0.3s ease;
}

body.page-solid .site-header .logo-text {
  color: var(--color-black);
}

.site-header.is-scrolled .logo-text {
  color: var(--color-black);
  font-size: var(--text-xl);
}

body.page-solid .site-header:not(.is-scrolled) .logo-text {
  font-size: var(--text-2xl);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: center;
  grid-column: 2;
  justify-self: center;
}

/* Glass pill — blur on the panel layer (desktop = this + ul share glass) */
.navbar-panel {
  display: flex;
  align-items: center;
}

.navbar ul {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin: 0;
  padding: var(--space-1);
  list-style: none;
  background: rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(14px) saturate(1.15);
  -webkit-backdrop-filter: blur(14px) saturate(1.15);
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: all 0.3s ease;
}

.site-header.is-scrolled .navbar ul,
body.page-solid .site-header .navbar ul {
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border-color: rgba(27, 41, 120, 0.08);
}

.nav-link {
  font-family: var(--font-ui);
  font-weight: 500;
  font-size: var(--text-md-2);
  line-height: 1;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  color: rgba(255, 255, 255, 0.82);
  opacity: 1;
  padding: var(--space-1) 11px;
  border-radius: var(--radius-pill);
  transition:
    color 0.2s ease,
    background-color 0.2s ease,
    text-shadow 0.2s ease;
}

/* Over dark hero (not scrolled): soft white, lift on hover */
body:not(.page-solid) .site-header:not(.is-scrolled) .nav-link {
  color: rgba(255, 255, 255, 0.8);
}

body:not(.page-solid) .site-header:not(.is-scrolled) .nav-link:hover {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.16);
}

body:not(.page-solid) .site-header:not(.is-scrolled) .nav-link.active {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.2);
}

/* Scrolled / solid inner pages: ink */
.site-header.is-scrolled .nav-link,
body.page-solid .site-header .nav-link {
  color: rgba(11, 11, 11, 0.78);
  text-shadow: none;
}

.site-header.is-scrolled .nav-link:hover,
body.page-solid .site-header .nav-link:hover {
  color: var(--color-navy);
  background: rgba(27, 41, 120, 0.08);
}

.site-header.is-scrolled .nav-link.active,
body.page-solid .site-header .nav-link.active {
  color: var(--color-navy);
  background: rgba(27, 41, 120, 0.1);
  font-weight: 600;
}

.header-cta {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  justify-self: end;
  grid-column: 3;
  min-width: 0;
}

/* Top of page: light CTA over hero; scroll / solid pages: dark pill */
body:not(.page-solid) .site-header:not(.is-scrolled) .header-cta .btn-pill--dark {
  background: var(--color-white);
  color: var(--color-navy);
}

body:not(.page-solid) .site-header:not(.is-scrolled) .header-cta .btn-pill--dark .btn-pill-dot {
  background: var(--color-navy);
}

.mobile-nav-toggle {
  display: none;
  font-size: var(--text-xl);
  color: var(--color-white);
  cursor: pointer;
  line-height: 1;
  transition: color 0.3s ease;
}

.site-header.is-scrolled .mobile-nav-toggle,
body.page-solid .site-header .mobile-nav-toggle {
  color: var(--color-black);
}

@media (prefers-reduced-motion: reduce) {
  .site-header,
  .logo-mark,
  .logo-mark path,
  .logo-text,
  .navbar ul,
  .navbar-panel,
  .nav-link,
  .mobile-nav-toggle {
    transition: none;
  }
}

@media (max-width: 1100px) {
  .navbar ul {
    gap: var(--space-2);
    padding: 0 var(--space-2);
  }

  .nav-link {
    font-size: var(--text-sm);
  }

  .logo-text {
    font-size: var(--text-xl);
  }

  .site-header.is-scrolled .logo-text {
    font-size: var(--text-lg);
  }
}

@media (max-width: 992px) {
  .site-header {
    padding: var(--space-2);
  }

  .header-inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .header-cta {
    display: none;
  }

  .mobile-nav-toggle {
    display: block;
  }

  .navbar {
    position: static;
    grid-column: 2;
    justify-self: end;
  }

  /*
    Glass lives on .navbar-panel (overflow: hidden only for radius clip).
    Scroll lives on the inner ul — putting overflow: auto + backdrop-filter
    on the same node is broken in WebKit and often ignored in Blink.
  */
  .navbar-panel {
    display: none;
    position: absolute;
    top: calc(100% + 6px);
    left: var(--space-2);
    right: var(--space-2);
    max-height: var(--mobile-nav-max-h);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.62);
    backdrop-filter: blur(20px) saturate(1.35);
    -webkit-backdrop-filter: blur(20px) saturate(1.35);
    border: 1px solid rgba(255, 255, 255, 0.55);
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.14);
    z-index: 50;
    overflow: hidden;
    isolation: isolate;
  }

  .navbar.navbar-open .navbar-panel {
    display: block;
  }

  .navbar ul {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    height: auto;
    max-height: var(--mobile-nav-max-h);
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    gap: 0;
    padding: var(--space-2);
    border-radius: 0;
    border: 0;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: none;
  }

  .navbar ul li {
    border-bottom: 1px solid rgba(27, 41, 120, 0.08);
  }

  .navbar ul li:last-child {
    border-bottom: 0;
  }

  .nav-link {
    display: block;
    padding: 14px var(--space-2);
    font-size: var(--text-md);
    color: var(--color-black);
    border-radius: var(--radius-sm);
    text-shadow: none;
    background: transparent;
  }

  .site-header:not(.is-scrolled) .navbar.navbar-open .nav-link {
    color: var(--color-black);
    text-shadow: none;
  }

  body:not(.page-solid) .site-header:not(.is-scrolled) .navbar.navbar-open .nav-link:hover,
  body:not(.page-solid) .site-header:not(.is-scrolled) .navbar.navbar-open .nav-link.active {
    color: var(--color-navy);
    background: rgba(27, 41, 120, 0.08);
    text-shadow: none;
  }

  .logo-mark {
    width: var(--space-6);
  }

  .site-header.is-scrolled .logo-mark {
    width: 36px;
  }

  .logo-text {
    font-size: var(--text-xl);
  }

  .logo {
    min-width: 0;
  }

  .logo-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

@media (max-width: 576px) {
  .site-header {
    padding: 10px var(--space-1);
  }

  .header-inner {
    min-height: var(--space-6);
  }

  .logo-text {
    font-size: var(--text-lg);
  }

  .navbar-panel {
    left: var(--space-1);
    right: var(--space-1);
  }
}